package com.bjsxt.service;

import com.bjsxt.dao.UserDAO;

import com.bjsxt.model.User;

public class UserService {

    private UserDAO userDAO;  

    public void init() {

        System.out.println("init");

    }

    public void add(User user) {

        userDAO.save(user);

    }

    public UserDAO getUserDAO() {

        return userDAO;

    }

    public void setUserDAO(UserDAO userDAO) {

        this.userDAO = userDAO;

    }

    public UserService(UserDAO userDAO) {

        super();

        this.userDAO = userDAO;

    }

    public void destroy() {

        System.out.println("destroy");

    }

}

<?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-2.5.xsd">

  <bean id="u" class="com.bjsxt.dao.impl.UserDAOImpl">

  </bean>

  <bean id="userService" class="com.bjsxt.service.UserService" init-method="init" destroy-method="destroy" scope="prototype">

      <!--

      <property name="userDAO" ref="u" />

       -->

       <constructor-arg>

           <ref bean="u"/>

       </constructor-arg>

  </bean>

</beans>

@Test

    public void testAdd() throws Exception {

        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");

        UserService service = (UserService)ctx.getBean("userService");

        UserService service2 = (UserService)ctx.getBean("userService");   //一般来说 不要和protytyoe混用 这样看不到destory  如果是singleton 则看到两次init 两次deatory

        ctx.destroy();

    }