Spring4学习笔记-通过注解配置bean

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通过注解配置Bean

TestObject.java

package com.spring.beans.annotation;import org.springframework.stereotype.Component;; @Componentpublic class TestObject { }

UserController.java

package com.spring.beans.annotation.controller; import org.springframework.stereotype.Controller; @Controllerpublic class UserController {     public void execute() {        System.out.println("UserController execute...");    }}

UserRepository.java接口

package com.spring.beans.annotation.repository; public interface UserRepository {     void save();}

UserRepositoryImpl.java

package com.spring.beans.annotation.repository; import org.springframework.stereotype.Repository; @Repository("userRepository")public class UserRepositoryImpl implements UserRepository{     @Override    public void save() {        // TODO Auto-generated method stub        System.out.println("UserRepositoryImpl save...");             } }

UserService.java

package com.spring.beans.annotation.service; import org.springframework.stereotype.Service; @Servicepublic class UserService {     public void add() {        System.out.println("UserService add...");    }}

beans-annotation.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:aop="http://www.springframework.org/schema/aop"    xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="    http://www.springframework.org/schema/context      http://www.springframework.org/schema/context/spring-context.xsd    http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd    http://www.springframework.org/schema/aop      http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">     <!-- 指定spring IOC容器扫描的包 -->    <!-- 通过resource-pattern指定扫描的资源 -->    <!--  只扫描repository下的类    <context:component-scan base-package="com.spring.beans.annotation" resource-pattern="repository/*.class"></context:component-scan>    -->    <!-- 不扫描repository注解的类 。可以配置多个。    <context:component-scan base-package="com.spring.beans.annotation" >        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Repository"/>    </context:component-scan>    -->    <!--  只扫描repository注解的类。可以配置多个。    <context:component-scan base-package="com.spring.beans.annotation"  use-default-filters="false">        <context:include-filter type="annotation" expression="org.springframework.stereotype.Repository"/>    </context:component-scan>    -->    <!--  不扫描某个接口。可以配置多个。使用assignable类型    <context:component-scan base-package="com.spring.beans.annotation"  use-default-filters="true">        <context:exclude-filter type="assignable" expression="com.spring.beans.annotation.repository.UserRepository"/>    </context:component-scan>    -->    <!--  只扫描某个接口。    <context:component-scan base-package="com.spring.beans.annotation"  use-default-filters="false">        <context:include-filter type="assignable" expression="com.spring.beans.annotation.repository.UserRepository"/>    </context:component-scan>    -->         <context:component-scan base-package="com.spring.beans.annotation" ></context:component-scan>     </beans>

Main.java

package com.spring.beans.annotation; import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext; import com.spring.beans.annotation.controller.UserController;import com.spring.beans.annotation.repository.UserRepository;import com.spring.beans.annotation.service.UserService; public class Main {     public static void main(String[] args) {        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("beans-annotation.xml");                 TestObject testObject = (TestObject) applicationContext.getBean("testObject");        System.out.println(testObject);                 UserController userController = (UserController) applicationContext.getBean("userController");        System.out.println(userController);                 UserService userService = (UserService) applicationContext.getBean("userService");        System.out.println(userService);                 UserRepository userRepository = (UserRepository) applicationContext.getBean("userRepository");        System.out.println(userRepository);    }}

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