@Resource注解使用

a) 加入：j2ee/common-annotations.jar

b) 默认按名称，名称找不到，按类型

c) 可以指定特定名称

d) 推荐使用

package com.zchen.service;
import javax.annotation.Resource;
import com.zchen.dao.UserDAO;
import com.zchen.model.User;
public class UserService {
	private UserDAO userDAO;  		
	public void add(User user) {
		userDAO.save(user);
	}
	public UserDAO getUserDAO() {
		return userDAO;
	}	
	@Resource
	public void setUserDAO( UserDAO userDAO) {
		this.userDAO = userDAO;
	}
}

 

<?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-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd">
	<context:annotation-config />
  <bean id="userDAO" class="com.bjsxt.dao.impl.UserDAOImpl"/>
  <bean id="ud" class="com.bjsxt.dao.impl.UserDAOImpl">
  <bean id="userService" class="com.bjsxt.service.UserService" />	
</beans>