Spring中数组，List,Map,Set注入方式

本文通过具体示例展示了Spring框架中如何使用不同类型的集合（数组、List、Set、Map）进行依赖注入，并提供了完整的代码实现及运行结果。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1.--User类

package org.stelcomtech;

import java.util.List;
import java.util.Map;
import java.util.Set;

public class User {
private String username;

private int age;

private Home myHome;

private Home[] homes;

private List homesList;

private Set homesSet;

private Map homesMap;

public Home[] getHomes() {
return homes;
}

public void setHomes(Home[] homes) {
this.homes = homes;
}

public List getHomesList() {
return homesList;
}

public void setHomesList(List homesList) {
this.homesList = homesList;
}

public Map getHomesMap() {
return homesMap;
}

public void setHomesMap(Map homesMap) {
this.homesMap = homesMap;
}

public Set getHomesSet() {
return homesSet;
}

public void setHomesSet(Set homesSet) {
this.homesSet = homesSet;
}

public Home getMyHome() {
return myHome;
}

public void setMyHome(Home myHome) {
this.myHome = myHome;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}

2.---Home类

package org.stelcomtech;

public class Home {
private String homeAddr;

public String getHomeAddr() {
return homeAddr;
}

public void setHomeAddr(String homeAddr) {
this.homeAddr = homeAddr;
}

}

3.--测试类 MainTest

package org.stelcomtech;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

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

public class MainTest {
public static void main(String[]args){
  ApplicationContext ac=new FileSystemXmlApplicationContext("org/stelcomtech/applicationContext.xml");
  User user=(User)ac.getBean("userid");
  Home[] homes=user.getHomes();
  System.out.println("************数组注入***************");
  for(int i=0;i<homes.length;i++){
   System.out.println("家庭地址："+homes[i].getHomeAddr());
  }
  System.out.println("************List注入********************");
  List list=user.getHomesList();
  Iterator ir=list.iterator();
  while(ir.hasNext()){
   //Home home1=(Home)ir.next();
   System.out.println("家庭地址："+ir.next().toString());
  }
  System.out.println("***********Set注入******************");
  Set set=user.getHomesSet();
  Iterator ir1=set.iterator();
  while(ir1.hasNext()){
   System.out.println("家庭地址："+ir1.next().toString());
  }
  System.out.println("************Map注入**************");
  Map map=user.getHomesMap();

   Home home11=(Home)map.get("1");
   System.out.println("家庭地址："+home11.getHomeAddr().toString());
   Home home111=(Home)map.get("2");
   System.out.println("家庭地址："+home111.getHomeAddr().toString());
  }

}

4.配置文件 applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<bean id="myHome1" class="org.stelcomtech.Home" abstract="false"
  lazy-init="default" dependency-check="default">
  <property name="homeAddr">
   <value>wuhan</value>
  </property>
</bean>
<bean id="myHome2" class="org.stelcomtech.Home" abstract="false"
  lazy-init="default" dependency-check="default">
  <property name="homeAddr">
   <value>shanghai</value>
  </property>
</bean>

<bean id="userid" class="org.stelcomtech.User" abstract="false"
    lazy-init="default" dependency-check="default">
  <property name="username">
   <value>haiyang</value>
  </property>
  <property name="age">
   <value>22</value>
  </property>

  
  <property name="homes">
  <list>
   <ref bean="myHome1" />
   <ref bean="myHome2" />
  </list>
  </property>
  
   <property name="homesList">
   <list>
    <ref bean="myHome1" />
    <ref bean="myHome2" />
    <value>haha</value>

   </list>
  </property>
  
   <property name="homesSet">
   <set>
    <value>hello</value>
    <ref bean="myHome2" />
    <ref bean="myHome1" />
   </set>
  </property>
  
  <property name="homesMap">
   <map>
    <entry key="1">
     <ref bean="myHome1" />
    </entry>
    <entry key="2">
    <ref bean="myHome2" />
    </entry>
   </map>
  </property>

</bean>
</beans>

5.运行结果

log4j:WARN No appenders could be found for logger (org.springframework.context.support.FileSystemXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
************数组注入***************
家庭地址：wuhan
家庭地址：shanghai
************List注入********************
家庭地址：org.stelcomtech.Home@1d7ad1c
家庭地址：org.stelcomtech.Home@65a77f
家庭地址：haha
***********Set注入******************
家庭地址：hello
家庭地址：org.stelcomtech.Home@65a77f
家庭地址：org.stelcomtech.Home@1d7ad1c
************Map注入**************
家庭地址：wuhan
家庭地址：shanghai