Spring單例Bean中注入多例Bean

問題:

當在一個單例Bean中注入一個多例Bean的時候,是獲取不到那個多例對象的,因為,單例在初始化的時候,就直接初始化,這個多例Bean啦, 一直獲取的是第一次初始化的Bean

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: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="single" class="com.lzd.spring.context.resource.test.bean.SingletonObject">
           <property name="prototypeObject" ref="prototype"></property>
        </bean>
       
        <bean id="prototype" class="com.lzd.spring.context.resource.test.bean.PrototypeObject" scope="prototype">
           <property name="name" value="劉東"></property>
           <property name="password" value="123"></property>
           <!-- <aop:scoped-proxy/> -->
        </bean>
</beans>

 

SingletonObject對象:

package com.lzd.spring.context.resource.test.bean;

public class SingletonObject {

   private PrototypeObject prototype;

   public void setPrototypeObject(PrototypeObject prototype){
       this.prototype = prototype;
   }
   
   public PrototypeObject getPrototype(){
       return this.prototype;
   }
   
}

PrototypeObject對象:

package com.lzd.spring.context.resource.test.bean;
/**
 *
 * <P>Description: 這是一個多例的對象</P>
 * @ClassName: PrototypeObject
 * @author lzd  2017年2月15日 上午10:54:52
 */
public class PrototypeObject {

   private String name;
   private String password;
   
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public String getPassword() {
       return password;
   }
   public void setPassword(String password) {
       this.password = password;
   }
}

ApplicationResourceTest測試類:

package com.lzd.spring.context.resource.test;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.lzd.spring.context.resource.test.bean.SingletonObject;

public class ApplicationResourceTest {

   @Test
   public void applicationResource(){
       ApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"classpath:application.xml"});
       
       
       SingletonObject s = (SingletonObject) context.getBean("single");
       
       for (int i = 0; i < 10; i++)
       System.out.println(s.getPrototype());
       
   }
   
}

 

問題解決:

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: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="single" class="com.lzd.spring.context.resource.test.bean.SingletonObject">
           <property name="prototypeObject" ref="prototype"></property>
        </bean>
       
        <bean id="prototype" class="com.lzd.spring.context.resource.test.bean.PrototypeObject" scope="prototype">
           <property name="name" value="劉東"></property>

           <property name="password" value="123"></property>

            <!-- 添加下面,一行,每次創建的,都是一個代理對象,然後注入獲取的都是新的對象 -->

          <aop:scoped-proxy/>
        </bean>
</beans>  

測試結果: