14、(知識篇)Spring使用Annotation配置bean01

/**
* Spring配置註解
* @Component 
* @Repository
* @Service
* @Controller
* 
* 使用@Autowired 自動裝配
* @Qualifier 指定裝配的名字
* 

*/

測試類:

package com.spring.test;

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

import com.spring.controller.UserController;

public class Test {
	public static void main(String[] args) {
		ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		
		/**
		 * Spring配置註解
		 * @Component 
		 * @Repository
		 * @Service
		 * @Controller
		 * 
		 * 使用@Autowired 自動裝配
		 * @Qualifier 指定裝配的名字
		 * 
		 */
		
		UserController userController = (UserController) ctx.getBean("userController");
		userController.save();
	}
}

Controller部分:

package com.spring.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import com.spring.service.UserService;

@Controller
public class UserController {
	
	@Autowired
	private UserService service;
	
	public void save(){
		service.save();
	}
}

Service部分:

package com.spring.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import com.spring.dao.UserDao;

@Service
public class UserService {
	
	@Autowired
	@Qualifier("userDao")
	private UserDao userDao;
	
	public void save(){
		userDao.save();
	}
	
}

Dao部分:

package com.spring.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.spring.bean.User;

@Repository("userDao")
public class UserDao {

	@Autowired
	private User user;
	
	public void save() {
		// TODO Auto-generated method stub
		user.setUserName("SuperMan");
		System.out.println(user + " == userDaoSave");
	}

}

VO部分:

package com.spring.bean;

import org.springframework.stereotype.Component;

@Component
public class User {

	private String userName;

	public User() {
		super();
		// TODO Auto-generated constructor stub
	}

	public User(String userName) {
		super();
		this.userName = userName;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	@Override
	public String toString() {
		return "User [userName=" + userName + "]";
	}
	
}

applicationContext.xml部分:

<?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.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">

	<!-- use-default-filters="false" 使用默認scan的annotation，如果爲false，則只使用include-flter的annotation -->
	<context:component-scan base-package="com.spring" >
		<!--
		排除Annotation， 指定Annotaion無效 (type=annotation)
		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
		 -->
		<!-- 
		指定Annotation有效
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
		 -->
		<!--
		指定類（及子類）無效  (type=assignable)
		<context:exclude-filter type="assignable" expression="com.spring.controller.UserController"/>
		 -->
		<!-- <context:include-filter type="assignable" expression="com.spring.controller.UserController"/> -->
	</context:component-scan>
</beans>