Spring 从零開始-03

这里说说bean装配集合。spring的支持的集合元素，其基本使用方式如同与Java的集合，所以假设对Java的集合不太了解的能够先找个帖子好好学习一下， 时间关系这里就不说了。

~~

list的样例

public interface Instrument {
void play();
}

public class Guitar implements Instrument {

@Override
public void play() {
// TODO Auto-generated method stub
System.out.println("dang dang dang");
}

}

public class Piano implements Instrument{

@Override
public void play() {
// TODO Auto-generated method stub
System.out.println("ding ding ding");
}

}

public class Saxophone implements Instrument{

@Override
public void play() {
// TODO Auto-generated method stub
System.out.println("wu wu wu ");
}

}

public class Band {
private Collection<Instrument> instrument;

public Collection<Instrument> getInstrument() {
return instrument;
}

public void setInstrument(Collection<Instrument> instrument) {
this.instrument = instrument;
}

public void play(){
for(Instrument ins:instrument)
ins.play();
}
}

public class test {

public static void main(String[] args) {
// TODO Auto-generated method stub
ApplicationContext ac = new ClassPathXmlApplicationContext("blog3/bean.xml");
Band band = (Band) ac.getBean("band");
band.play();
}

}

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> 
<bean id="band" class="blog3.Band">
<property name="instrument">
<list>
<ref bean="guitar"/>
<ref bean="piano"/>
<ref bean="saxophone"/>
</list>
</property>
</bean>

<bean id="guitar" class="blog3.Guitar"/>
<bean id="piano" class="blog3.Piano"/>
<bean id="saxophone" class="blog3.Saxophone"/>

set和list使用方式一致。把list换成set就好了，主要是set中元素不能反复。另外多说一点，为了解耦Spring推荐使用基于接口的编程方式。

另外数组也是使用这样的装配方式。

map

<bean id="bandmap" class="blog3.Band">
<property name="mapIns">
<map>
<entry key="GUITAR" value-ref="guitar"/>
<entry key="PINAO" value-ref="piano"/>
<entry key="SAXOPHONE" value-ref="saxophone"/>
</map>
</property>
</bean>

public class Band {
private Collection<Instrument> instrument;
private Map<String, Instrument> mapIns;

public Map<String, Instrument> getMapIns() {
return mapIns;
}

public void setMapIns(Map<String, Instrument> mapIns) {
this.mapIns = mapIns;
}

public Collection<Instrument> getInstrument() {
return instrument;
}

public void setInstrument(Collection<Instrument> instrument) {
this.instrument = instrument;
}

public void play(){
for(Instrument ins:instrument)
ins.play();
}

public void mapPlay(){
for(String key:mapIns.keySet()){
System.out.println(key);
Instrument tmp = mapIns.get(key);
tmp.play();
}

}
}

public static void main(String[] args) {
// TODO Auto-generated method stub
ApplicationContext ac = new ClassPathXmlApplicationContext("blog3/bean.xml");
//      Band band = (Band) ac.getBean("band");
//      band.play();

Band band2 = (Band) ac.getBean("bandmap");
band2.mapPlay();
}

properties装配，对照与map，properties的key和value仅仅能是string类型。其余都差点儿相同

好了，差点儿相同了。上代码吧。

http://download.csdn.net/detail/wsrspirit/8868347