spring中集合的注入方式

在Spring中相应的可以用来定义和设置类型为java的List，Set，Map和Properties。

对集合的注入方法进行总结：

对于List，Set，Map和Properties 来说都是类似的，都是要先把注入的信息注入到集合中去，然后再把集合注入到相关的Bean中。

======================练习一：List=================

------------------------------------HelloWord 类-------------------------------

package com.gc.action;

import java.util.List;
public class HelloWord {
 private List msg;

 public HelloWord() {
  super();
 }

 public HelloWord(List msg) {
  super();
  this.msg = msg;
 }
 //getXxx和SetXxx
 public List getMsg() {
  return msg;
 }

 public void setMsg(List msg) {
  this.msg = msg;
 }
}

------------------------config.xml-----------------------------

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
 "http://www./dtd/spring-beans.dtd">

<beans>
 <bean id="HelloWord" class="com.gc.action.HelloWord" >
  <property name="msg">
   <list>
    <value>zx1</value>
    <value>zx2</value>
    <value>zx3</value>
   </list>
  </property>
 </bean>
</beans>

----------------------------TestHelloWord 测试类----------------

package com.gc.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.gc.action.HelloWord;

public class TestHelloWord {

 /**
  * @param args
  */
 public static void main(String[] args) {
  ApplicationContext ac =new FileSystemXmlApplicationContext("classpath:/config.xml");
  HelloWord hw =(HelloWord) ac.getBean("HelloWord");
  System.out.println(hw.getMsg());
 }
}

---------------结果---------------

[zx1, zx2, zx3]

====================练习二：Set=================

-------------------HelloWord 类----------------

package com.gc.action;

import java.util.List;
import java.util.Set;
public class HelloWord {
 private Set msg;

 public HelloWord() {
  super();
 }

 public HelloWord(Set msg) {
  super();
  this.msg = msg;
 }
 //getXxx和SetXxx
 public Set getMsg() {
  return msg;
 }

 public void setMsg(Set msg) {
  this.msg = msg;
 }

}
---------------------------------config.xml-----------------------------

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
 "http://www./dtd/spring-beans.dtd">

<beans>
 <bean id="HelloWord" class="com.gc.action.HelloWord" >
  <property name="msg">
   <set>
    <value>111</value>
    <value>222</value>
    <value>333</value>
   </set>
  </property>
 </bean>
</beans>

--------------------TestHelloWord 测试类----------------------------

package com.gc.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.gc.action.HelloWord;

public class TestHelloWord {
 public static void main(String[] args) {
  ApplicationContext ac =new FileSystemXmlApplicationContext("classpath:/config.xml");
  HelloWord hw =(HelloWord) ac.getBean("HelloWord");
  System.out.println(hw.getMsg());
 }
}

-------------------结果-------------

[111, 222, 333]

======================练习三：Map==================

package com.gc.action;

import java.util.Map;
import java.util.Set;
public class HelloWord {
 private Map msg;

 public HelloWord() {
  super();
 }

 public HelloWord(Map msg) {
  super();
  this.msg = msg;
 }

 public Map getMsg() {
  return msg;
 }

 public void setMsg(Map msg) {
  this.msg = msg;
 }
}

-----------------------config.xml-------------

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
 "http://www./dtd/spring-beans.dtd">

<beans>
 <bean id="HelloWord" class="com.gc.action.HelloWord" >
  <property name="msg">
   <map>
    <entry key="z">
     <value>aaa </value>
    </entry>
    <entry key="x">
     <value>bbb </value>
    </entry>
   </map>
  </property>
 </bean>
</beans>

--------------------------TestHelloWord 测试类------------

package com.gc.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.gc.action.HelloWord;

public class TestHelloWord {
 public static void main(String[] args) {
  ApplicationContext ac =new FileSystemXmlApplicationContext("classpath:/config.xml");
  HelloWord hw =(HelloWord) ac.getBean("HelloWord");
  System.out.println(hw.getMsg());
 }
}

----------------结果-------------

{z=aaa , x=bbb }

==========================练习四：Properties===============

--------------HelloWord 类---------------------

package com.gc.action;

import java.util.Properties;

public class HelloWord {
 private Properties msg;

 public HelloWord(Properties msg) {
  super();
  this.msg = msg;
 }

 public HelloWord() {
  super();
 }

 public Properties getMsg() {
  return msg;
 }

 public void setMsg(Properties msg) {
  this.msg = msg;
 }
}

-----------------------------config.xml--------------------

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
 "http://www./dtd/spring-beans.dtd">

<beans>
 <bean id="HelloWord" class="com.gc.action.HelloWord" >
  <property name="msg">
   <props>
    <prop key="zz">aaa</prop>
    <prop key="xx">bbb</prop>
   </props>
  </property>
 </bean>
</beans>

--------------------------------TestHelloWord测试类-----------------------------

package com.gc.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.gc.action.HelloWord;

public class TestHelloWord {
 public static void main(String[] args) {
  ApplicationContext ac =new FileSystemXmlApplicationContext("classpath:/config.xml");
  HelloWord hw =(HelloWord) ac.getBean("HelloWord");
  System.out.println(hw.getMsg());
 }
}
-------------------结果------------

{zz=aaa, xx=bbb}