spring <context:annotation-config> 跟 <context:component-scan>诠释及区别
2014-08-18 10:16
441 查看
<context:annotation-config> 和 <context:component-scan>的区别
sanning的方式)上面的注解。
下面我们通过例子来详细查看他们的区别,
有三个class A,B,C,并且B,C的对象被注入到A中.
[java] view
plaincopy
package com.xxx;
public class B {
public B() {
System.out.println("creating bean B: " + this);
}
}
package com.xxx;
public class C {
public C() {
System.out.println("creating bean C: " + this);
}
}
package com.yyy;
import com.xxx.B;
import com.xxx.C;
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
在applicationContext.xml中加入下面的配置 :
加载applicationContext.xml配置文件,将得到下面的结果:
OK, 这个结果没什么好说的,就是完全通过xml的方式,不过太过时了,下面通过注解的方式来简化我们的xml配置文件
首先,我们使用autowire的方式将对象bbb和ccc注入到A中:
[java] view
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package com.yyy;
import org.springframework.beans.factory.annotation.Autowired;
import com.xxx.B;
import com.xxx.C;
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
@Autowired
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
@Autowired
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
然后,我们就可以从applicationContext.xml中移除下面的配置
移除之后,我们的applicationContext.xml配置文件就简化为下面的样子了
当我们加载applicationContext.xml配置文件之后,将得到下面的结果:
OK, 结果是错误的的,究竟是因为什么呢?为什么我们的属性没有被注入进去呢?
是因为注解本身并不能够做任何事情,它们只是最基本的组成部分,我们需要能够处理这些注解的处理工具来处理这些注解
我们将applicationContext.xml配置文件作如下修改:
当我们加载applicationContext.xml配置文件之后,将得到下面的结果:
OK, 结果正确了
但是如果我们将代码作如下修改:
[java] view
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package com.xxx;
import org.springframework.stereotype.Component;
@Component
public class B {
public B() {
System.out.println("creating bean B: " + this);
}
}
package com.xxx;
import org.springframework.stereotype.Component;
@Component
public class C {
public C() {
System.out.println("creating bean C: " + this);
}
}
package com.yyy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.xxx.B;
import com.xxx.C;
@Component
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
@Autowired
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
@Autowired
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
applicationContext.xml配置文件修改为:
当我们加载applicationContext.xml配置文件之后,却没有任何输出,这是为什么呢?
那是因为<context:annotation-config />仅能够在已经在已经注册过的bean上面起作用。
对于没有在spring容器中注册的bean,它并不能执行任何操作。
但是不用担心,
/>的功能之外,还具有自动将带有@component,@service,@Repository等注解的对象注册到spring容器中的功能。
我们将applicationContext.xml配置文件作如下修改:
当我们加载applicationContext.xml的时候,会得到下面的结果:
这是什么原因呢?
是因为我们仅仅扫描了com.xxx包及其子包的类,而class A是在com.yyy包下,所以就扫描不到了
下面我们在applicationContext.xml中把com.yyy也加入进来:
哇,结果正确啦 !
回头看下我们的applicationContext.xml文件,已经简化为:
了。
那如果我们在applicationContext.xml手动加上下面的配置,也就是说既在applicationContext.xml中手动的注册了A的实例对象,同时,通过component-scan去扫描并注册B,C的对象
结果仍是正确的:
虽然class A并不是通过扫描的方式注册到容器中的 ,但是
那么,如果我们通过下面的方式呢?我们既配置了<context:annotation-config />,又配置了<context:component-scan base-package="com.xxx" />,它们都具有处理在容器中注册的bean里面的注解的功能。会不会出现重复注入的情况呢?
不用担心,不会出现的:
因为
哪怕是你手动的注册了多个处理器,spring仍然只会处理一次:
[xml] view
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<context:annotation-config />
<context:component-scan base-package="com.xxx" />
<bean id="aBean" class="com.yyy.A" />
<bean id="bla" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla1" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla2" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla3" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
结果仍是正确的:
Difference between <context:annotation-config> vs <context:component-scan>
<context:annotation-config>是用于激活那些已经在spring容器里注册过的bean(无论是通过xml的方式还是通过package
sanning的方式)上面的注解。
<context:component-scan>除了具有
<context:annotation-config>的功能之外,
<context:component-scan>还可以在指定的package下扫描以及注册javabean 。
下面我们通过例子来详细查看他们的区别,
有三个class A,B,C,并且B,C的对象被注入到A中.
[java] view
plaincopy
package com.xxx;
public class B {
public B() {
System.out.println("creating bean B: " + this);
}
}
package com.xxx;
public class C {
public C() {
System.out.println("creating bean C: " + this);
}
}
package com.yyy;
import com.xxx.B;
import com.xxx.C;
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
在applicationContext.xml中加入下面的配置 :
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.B"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> <</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"cBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.C"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"aBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.yyy.A"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> <</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">property name</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bbb"</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> ref</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bBean"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">property name</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"ccc"</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> ref</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"cBean"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> </</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">></span></code>
加载applicationContext.xml配置文件,将得到下面的结果:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@c2ff5 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@1e8a1f6 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@1e152c5 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@c2ff5 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@1e8a1f6</span></code>
OK, 这个结果没什么好说的,就是完全通过xml的方式,不过太过时了,下面通过注解的方式来简化我们的xml配置文件
首先,我们使用autowire的方式将对象bbb和ccc注入到A中:
[java] view
plaincopy
package com.yyy;
import org.springframework.beans.factory.annotation.Autowired;
import com.xxx.B;
import com.xxx.C;
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
@Autowired
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
@Autowired
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
然后,我们就可以从applicationContext.xml中移除下面的配置
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">property name</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bbb"</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> ref</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bBean"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> <</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">property name</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"ccc"</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> ref</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"cBean"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
移除之后,我们的applicationContext.xml配置文件就简化为下面的样子了
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.B"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"cBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.C"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"aBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.yyy.A"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
当我们加载applicationContext.xml配置文件之后,将得到下面的结果:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@5e5a50 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@54a328 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@a3d4cf</span></code>
OK, 结果是错误的的,究竟是因为什么呢?为什么我们的属性没有被注入进去呢?
是因为注解本身并不能够做任何事情,它们只是最基本的组成部分,我们需要能够处理这些注解的处理工具来处理这些注解
这就是<context:annotation-config>所做的事情
我们将applicationContext.xml配置文件作如下修改:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">annotation</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">config </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> <</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"bBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.B"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"cBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx.C"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> <</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"aBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.yyy.A"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
当我们加载applicationContext.xml配置文件之后,将得到下面的结果:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@15663a2 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@cd5f8b creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@157aa53 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@15663a2 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@cd5f8b</span></code>
OK, 结果正确了
但是如果我们将代码作如下修改:
[java] view
plaincopy
package com.xxx;
import org.springframework.stereotype.Component;
@Component
public class B {
public B() {
System.out.println("creating bean B: " + this);
}
}
package com.xxx;
import org.springframework.stereotype.Component;
@Component
public class C {
public C() {
System.out.println("creating bean C: " + this);
}
}
package com.yyy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.xxx.B;
import com.xxx.C;
@Component
public class A {
private B bbb;
private C ccc;
public A() {
System.out.println("creating bean A: " + this);
}
@Autowired
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
@Autowired
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
applicationContext.xml配置文件修改为:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">annotation</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">config </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
当我们加载applicationContext.xml配置文件之后,却没有任何输出,这是为什么呢?
那是因为<context:annotation-config />仅能够在已经在已经注册过的bean上面起作用。
对于没有在spring容器中注册的bean,它并不能执行任何操作。
但是不用担心,
<context:component-scan>除了具有<context:annotation-config
/>的功能之外,还具有自动将带有@component,@service,@Repository等注解的对象注册到spring容器中的功能。
我们将applicationContext.xml配置文件作如下修改:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">component</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">scan base</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">package</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
当我们加载applicationContext.xml的时候,会得到下面的结果:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@1be0f0a creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@80d1ff</span></code>
这是什么原因呢?
是因为我们仅仅扫描了com.xxx包及其子包的类,而class A是在com.yyy包下,所以就扫描不到了
下面我们在applicationContext.xml中把com.yyy也加入进来:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">component</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">scan base</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">package</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span></code><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;"><</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">context</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">:</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">component</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">-</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">scan base</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">-</span><span class="kwd" style="font-family: 'Courier New', Courier, monospace; color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">package</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">=</span><span class="str" style="font-family: 'Courier New', Courier, monospace; color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">"com.xxx,com.yyy"</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">/></span>
然后加载applicationContext.xml就会得到下面的结果:<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"></code>
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@cd5f8b creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@15ac3c9 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@ec4a87 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@cd5f8b setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@15ac3c9</span></code>
哇,结果正确啦 !
回头看下我们的applicationContext.xml文件,已经简化为:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">component</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">scan base</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">package</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span></code><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;"><</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">context</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">:</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">component</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">-</span><span class="pln" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">scan base</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">-</span><span class="kwd" style="font-family: 'Courier New', Courier, monospace; color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">package</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">=</span><span class="str" style="font-family: 'Courier New', Courier, monospace; color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">"com.xxx,com.yyy"</span><span class="pun" style="font-family: 'Courier New', Courier, monospace; border: 0px; padding: 0px; background-color: transparent; margin: 0px; font-size: 1em; vertical-align: baseline;">/></span>
了。
那如果我们在applicationContext.xml手动加上下面的配置,也就是说既在applicationContext.xml中手动的注册了A的实例对象,同时,通过component-scan去扫描并注册B,C的对象
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">component</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">scan base</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">package</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/> </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"aBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.yyy.A"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
结果仍是正确的:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@1d64c37 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87</span></code>
虽然class A并不是通过扫描的方式注册到容器中的 ,但是
<context:component-scan>所产生的的处理那些注解的处理器工具,会处理所有绑定到容器上面的bean,不管是通过xml手动注册的还是通过scanning扫描注册的。
那么,如果我们通过下面的方式呢?我们既配置了<context:annotation-config />,又配置了<context:component-scan base-package="com.xxx" />,它们都具有处理在容器中注册的bean里面的注解的功能。会不会出现重复注入的情况呢?
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">annotation</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">config </span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">context</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">component</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">scan base</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">-</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">package</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.xxx"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"><</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bean id</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"aBean"</span><span class="kwd" style="color: rgb(0, 0, 139); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">class</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">=</span><span class="str" style="color: rgb(128, 0, 0); border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">"com.yyy.A"</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">/></span></code>
不用担心,不会出现的:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@1d64c37 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87</span></code>
因为
<context:annotation-config />和
<context:component-scan>同时存在的时候,前者会被忽略。也就是那些@autowire,@resource等注入注解只会被注入一次
哪怕是你手动的注册了多个处理器,spring仍然只会处理一次:
[xml] view
plaincopy
<context:annotation-config />
<context:component-scan base-package="com.xxx" />
<bean id="aBean" class="com.yyy.A" />
<bean id="bla" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla1" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla2" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean id="bla3" class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
结果仍是正确的:
<code style="border: 0px; padding: 0px; margin: 0px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; vertical-align: baseline;"><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">creating bean B</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 creating bean C</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87 creating bean A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">:</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;"> com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">yyy</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">A@25d2b2 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">bbb with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">B@157aa53 setting A</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">ccc with com</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">xxx</span><span class="pun" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">.</span><span class="pln" style="border: 0px; padding: 0px; background-color: transparent; margin: 0px; vertical-align: baseline;">C@ec4a87</span></code>
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