@Scope的使用很简单，直接在类上加上就行
@PostConstruct：相当于xml配置方式的init-method方法
@PreDestroy：相当于xml配置方式的destroy-method方法
例如：userService
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | package com.fz.annotation.service;import javax.annotation.PostConstruct;import javax.annotation.PreDestroy;import javax.annotation.Resource;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Component;import com.fz.annotation.dao.UserDao;import com.fz.xml.entity.User;@Service("userService")@Scope("prototype")public class UserService { private UserDao userDao; public void userAdd(){ User user = new User(); user.setUsername("zhangsan"); user.setPassword("zhangsan"); userDao.userAdd(user); } public UserDao getUserDao() { return userDao; } @Resource(name="userDaoImpl") public void setUserDao(UserDao userDao) { this.userDao = userDao; } @PostConstruct public void init(){ System.out.println("init..."); } @PreDestroy public void destroy(){ System.out.println("destroy..."); }} |
applicationContext.xml配置很简单：
1 2 3 4 5 6 7 8 9 10 11 12 | <?xml version="1.0" encoding="UTF-8"?> xsi:schemaLocation="http://www.springframework.org/schema/beans <context:annotation-config/> <context:component-scan base-package="com.fz.annotation"></context:component-scan> </beans> |
测试代码：
1 2 3 4 5 6 7 8 9 | @Testpublic void getProperties(){ ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext_annotation.xml"); UserService userService = (UserService) ctx.getBean("userService"); UserService userService1 = (UserService) ctx.getBean("userService"); userService.userAdd(); System.out.println(userService == userService1); ctx.destroy();} |
结果如下：
可以看出init还是执行了两次，两个对象也不是同一个对象，但是destroy同样还是不执行了。。。。
SpringAnnotation注解之@PreDestroy，@PostConstruct，@Scope
原文：http://www.cnblogs.com/meet/p/4758204.html