在spring框架中为Map注入属性
1map映射的对象创建
package com; /**
* Map集合在spring中的使用测试
*/
public class User {
private int id;
private String name;
private String pwd;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Override
public String toString() {
return "User[id=" + id + ", name=" + name + ", pwd=" + pwd + "]";
}
public User(int id, String name, String pwd) {
super();
this.id = id;
this.name = name;
this.pwd = pwd;
}
public User() {
super();
// TODO Auto-generated constructor stub
}
}
2.Map的使用者
package com; import java.util.Map; /**
* Map 集合在spring框架中的使用测试
*/
public class MapDemo {
private int id;
private String name;
private String pwd;
private Map<String,User> user;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
} public Map<String, User> getUser() {
return user;
} public void setUser(Map<String, User> user) {
this.user = user;
} @Override
public String toString() {
return "MapDemo [id=" + id + ", name=" + name + ", pwd=" + pwd + ", user="
+ user + "]";
}
public MapDemo() {
super();
// TODO Auto-generated constructor stub
}
public MapDemo(int id, String name, String pwd, Map<String, User> user) {
super();
this.id = id;
this.name = name;
this.pwd = pwd;
this.user = user;
}
}
3.配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="user1" class="com.User">
<property name="id" value="1"></property>
<property name="name" value="name1"></property>
<property name="pwd" value="pwd1"></property>
</bean>
<bean id="user2" class="com.User">
<property name="id" value="2"></property>
<property name="name" value="name2"></property>
<property name="pwd" value="pwd2"></property>
</bean>
<bean id="user3" class="com.User">
<property name="id" value="3"></property>
<property name="name" value="name3"></property>
<property name="pwd" value="pwd3"></property>
</bean>
<!-- map集合的注入 -->
<util:map id="user">
<entry key="1" value-ref="user1" />
<entry key="2" value-ref="user2"/>
<entry key="2" value-ref="user3"/>
</util:map>
<bean id="mapDemo" class="com.MapDemo">
<property name="id" value="001"/>
<property name="name" value="tom"/>
<property name="pwd" value="123456"/>
<!-- 把User类涉及到Demo2类中-->
<property name="user" ref="user"/>
</bean>
</beans>
4.测试代码
package test; import com.MapDemo;
import org.springframework.context.support.ClassPathXmlApplicationContext; /**
* Created by Administrator on 2016/12/4.
*/
public class MapDemoTest {
public static void main(String[] args) {
ClassPathXmlApplicationContext cx=new ClassPathXmlApplicationContext("demo1.xml");
MapDemo mapDemo=(MapDemo) cx.getBean("mapDemo");
System.out.println(mapDemo);
}
}
备注：在测试的时候出了一个问题。因为有修改过User的类名。所以在MapDemo中也同步替换了属性名和方法名，但是在注入的时候一直失败。提示user的问题。
解决：删除set、get，重新生成。