Spring3.0 Component的用法(可以省去bean的定义)

来源：互联网发布：java run 编辑：程序博客网时间：2024/06/15 16:43

1.applicationContext.xml加入如下配置

<?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           ">   <!--可以使用注解-->   <context:annotation-config/>
   <!--自动扫描com.nantian下面标注@Component的bean-->   <context:component-scan base-package="com.nantian"/>      <bean id="userService" class="com.nantian.service.UserService"></bean>
</beans>

2.容器将自动扫描com.nantian下面所有的带@Component的bean。UserDao.java

package com.nantian.dao;import org.springframework.stereotype.Component;@Componentpublic class UserDao {public void getUser(){System.out.println("userDao be used!");}}