package spring.beans.annotation.controller;

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

import org.springframework.stereotype.Controller;

import spring.beans.annotation.service.UserService;

@Controller

public class UserController {

    @Autowired

    private UserService userService;

    public  void add() {

        System.out.println("UserController add...");

        userService.add();

    }

}

package spring.beans.annotation.service;

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

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.stereotype.Service;

import spring.beans.annotation.repository.UserRepository;

import spring.beans.annotation.repository.UserRepositoryImpl;

@Service

public class UserService {

    @Autowired

    @Qualifier("userRepositoryImpl")

    private UserRepository userRepository;

    public void add(){

        System.out.println("UserService add...");

        userRepository.add();

    }

}

package spring.beans.annotation.repository;

public interface UserRepository {

    public void add();

}

package spring.beans.annotation.repository;

import org.springframework.stereotype.Repository;

@Repository//("userRepository")

//这里设置的value="userRepository",也可以用@Qualifier("userRepositoryImpl")写在装配它的地方

public class UserRepositoryImpl implements UserRepository {

    @Override

    public void add() {

        System.out.println("UserRepositoryImpl add...");

    }

}

<?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-4.3.xsd">

    <!-- 扫描指定spring IOC容器的类 -->

    <!--使用resource-pattern扫描特定的类 -->

    <!--

    <context:component-scan base-package="spring.beans.annotation"

        resource-pattern="repository/*.class">

    </context:component-scan>

     -->

     <!-- 筛选扫描 -->

    <context:component-scan base-package="spring.beans.annotation"

    >

        <!-- 扫描不包含指定类型（表达式）的类 -->

        <!--

        <context:exclude-filter type="annotation"

        expression="org.springframework.stereotype.Repository"/>

         -->

         <!-- 扫描包含指定类型（表达式）的类(context下设置use-default-filters="false")配合使用 -->

         <!-- <context:include-filter type="annotation"

         expression="org.springframework.stereotype.Repository"/>

          -->

          <!-- 扫描除了该接口 或该接口实现类的类 -->

          <!-- <context:exclude-filter type="assignable"

          expression="spring.beans.annotation.repository.UserRepository"/>

           -->

          <!-- 只扫描包含该接口 或该接口实现类的类 (context下设置use-default-filters="false")配合使用-->

          <!-- <context:include-filter type="assignable"

          expression="spring.beans.annotation.repository.UserRepository"/>

             -->

    </context:component-scan>

</beans>