Spring中常用注解
<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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><!-- <context:annotation-config /> --><context:component-scan base-package="com.zzt.test" /></beans>

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IUserService.java

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package com.zzt.test;public interface IUserService {public void service();}

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UserServiceImpl.java

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package com.zzt.test;import org.springframework.stereotype.Service;@Servicepublic class UserServiceImpl implements IUserService {@Overridepublic void service() {System.out.println("service ...");}}

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Person.java

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package com.zzt.test;public interface Person {void testPerson();}

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Man.java

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package com.zzt.test;import org.springframework.stereotype.Component;@Component//("man")public class Man implements Person {@Overridepublic void testPerson() {System.out.println("===========man===========");}}

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Woman.java

package com.zzt.test;import org.springframework.stereotype.Component;@Component//("woman")public class Woman implements Person {@Overridepublic void testPerson() {System.out.println("===========woman=========");}}

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用于测试的类：TestAction.java

package com.zzt.test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Controller;@Controllerpublic class TestAction {@Autowiredpublic IUserService userService;@Autowired@Qualifier("woman")private Person person;public void test() {userService.service();person.testPerson();}}

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程序入口：Demo.java

package com.zzt.test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Demo {public static void main(String[] args) throws InterruptedException {ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");TestAction action = (TestAction) context.getBean("testAction");action.test();}}

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?getBean的默认名称是类名（头字母小 写），如果想自定义，可以@Service(“aaaaa”)这样来指定，这种bean默认是单例的，如果想改变，可以使用 @Service(“beanName”) @Scope(“prototype”)来改变。可以使用以下方式指定初始化方法和销毁方法（方法名任意）：?

@PostConstruct public void init() { ?

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@PreDestroy public void destory() { ?

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关于更多注解的使用，参考：http://www.iteye.com/topic/295348