Spring开发环境搭建以及创建示例工程

一、环境搭建

Spring开发包的下载位置http://repo.spring.io/release/org/springframework/spring/

二、创建示例工程

1、建立Java Project工程

File-> new other->Java->Java Project        工程名为 Test

        在工程文件下新建lib文件夹，将spring-framework压缩包中的libs文件夹中的jar文件拷贝到工程文件中的lib文件中，点击刷新

    为了在工程中使用上述Jar文件，需要添加到Build Path中

        右键Propertries选择 Java Build Path,点击Libraries 下的Add JARs  选择Test工程下的lib中的所有jar文件

      


  点击OK



完成后的工程目录

       


2、编写Java文件

       a.新建Java Interface 

         


在IHelloMessage中创建方法

       

package com.cc.test;
public interface IHelloMessage {
public String sayHello();

}

       b.创建接口实现类HelloWorld, 接口实现类，向用户输出“Hello everybody”信息

package com.cc.test;

public class HelloWorld implements IHelloMessage {

@Override
public String sayHello() {
// TODO Auto-generated method stub
return "Hello World!";
}

}

  c.创建HelloChina实现类

package com.cc.test;

public class HelloChina implements IHelloMessage {

@Override
public String sayHello() {
// TODO Auto-generated method stub
return "大家好";
}
}

 d.创建Person类,调用IHelloMessage接口，向用户输出问候信息

         在Person类中引用IHelloMessage类，并为helloMessage创建get和set方法，右键helloMessage

 选择Source->Generate Getters and Setters

         


         选择Select All 点击OK

       

public class Person {
private IHelloMessage helloMessage;

public IHelloMessage getHelloMessage() {
return helloMessage;
}

public void setHelloMessage(IHelloMessage helloMessage) {
this.helloMessage = helloMessage;
}

public String sayHello() {
return this.helloMessage.sayHello();
}

}

       e.创建Main程序入口，用于加载配置文件，以及IOC容器，调用人物类，向用户输出问候信息

在创建类时需要选择public static void main(String [] args)方法

package com.cc.test;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;

public class Main {

public static void main(String[] args) {
// TODO Auto-generated method stub
Resource resource = new FileSystemResource("helloMessage.xml"); // 用于读取配置文件
BeanFactory factory = new XmlBeanFactory(resource); // 用于加载配置文件
Person  person=(Person)factory.getBean("person");
String string=person.sayHello();
System.out.println(string);

}

}

     

3、编写配置文件

a.新建配置文件helloMessage.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
"http://www.springframework.org/dtd/spring-bin.dtd">
<beans>
<bean id ="helloWorld" class="com.cc.test.HelloWorld"></bean>
<bean id="helloChina"  class="com.cc.test.HelloChina"></bean>
<bean id="person"      class="com.cc.test.Person">
<property name="helloMessage" ref="helloChina"></property>
</bean>

</beans>

4、运行事例工程

出现错误

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.<init>(DefaultSingletonBeanRegistry.java:83)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.<init>(FactoryBeanRegistrySupport.java:43)
at org.springframework.beans.factory.support.AbstractBeanFactory.<init>(AbstractBeanFactory.java:178)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:160)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:171)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.<init>(DefaultListableBeanFactory.java:193)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:78)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
at com.cc.test.Main.main(Main.java:13)

Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 9 more

是因为缺少缺少 commons-logging.jar

下载地址  http://download.csdn.net/detail/lrici/9743894

运行结果



修改helloMessage文件



运行结果



源码地址http://download.csdn.net/detail/lrici/9743891