spring @Autowired @Qualifier

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userservice

package com.bjsxt.service;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import com.bjsxt.dao.UserDAO;import com.bjsxt.model.User;public class UserService {private UserDAO userDAO;  public void add(User user) {userDAO.save(user);}public UserDAO getUserDAO() {return userDAO;}@Autowiredpublic void setUserDAO(@Qualifier("userDAO") UserDAO userDAO) {this.userDAO = userDAO;}}

beans.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"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd           http://www.springframework.org/schema/context           http://www.springframework.org/schema/context/spring-context-3.0.xsd"><context:annotation-config></context:annotation-config>  <bean name="userDAO" class="com.bjsxt.dao.impl.UserDAOImpl"></bean> <bean name="u" class="com.bjsxt.dao.impl.UserDAOImpl"></bean>  <bean id="userService" class="com.bjsxt.service.UserService" >  <!--<property name="userDAO" ref="userDAO"> </property>   -->  </bean></beans>

test

package com.bjsxt.service;import org.junit.Test;import org.springframework.beans.factory.BeanFactory;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.bjsxt.model.User;public class UserServiceTest {@Testpublic void testAdd() throws Exception {BeanFactory applicationContext = new ClassPathXmlApplicationContext("beans.xml");UserService service = (UserService)applicationContext.getBean("userService");service.add(new User());}}