标签：mvn cti ica 概述 str const pen ota void
1、概述
1.1、Spring对Bean的生命周期的操作提供了支持，提供2种方式：
1.1.1、java配置方式：
使用@Bean的initMethod,destoryMethod属性（相当于xml 配置文件中的init-method，destory-method）；
1.1.2、注解方式：
使用JSR-250的@PostConstruct，@PreDestroy
需要使用JSR-250支持：
<!-- https://mvnrepository.com/artifact/javax.annotation/jsr250-api -->
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>
1.1.3、eg：
package com.an.config;
import com.an.service.bean.BeanWayService;
import com.an.service.bean.JSR250WayService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
/**
* @description:
* @author: anpeiyong
* @date: Created in 2019/11/19 16:02
* @since:
*/
@Configuration
@ComponentScan(value = "com.an")
public class PrePostConfig {
//第一种方式：java配置
@Bean(initMethod = "init",destroyMethod = "destroy")
BeanWayService beanWayService(){
return new BeanWayService();
}
//第二种方式：注解方式
@Bean
JSR250WayService jsr250WayService(){
return new JSR250WayService();
}
}
package com.an.service.bean;
/**
* @description:
* @author: anpeiyong
* @date: Created in 2019/11/19 16:04
* @since:
*/
public class BeanWayService {
public BeanWayService(){
super();
System.out.println("初始化构造函数-BeanWayService");
}
public void init(){
System.out.println("@Bean-init-method");
}
public void destroy(){
System.out.println("@Bean-destroy-method");
}
}
package com.an.service.bean;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
/**
* @description:
* @author: anpeiyong
* @date: Created in 2019/11/19 16:07
* @since:
*/
public class JSR250WayService {
public JSR250WayService(){
super();
System.out.println("初始化构造函数-JSR250WayService");
}
//@PostConstruct在构造函数执行完后执行
@PostConstruct
public void init(){
System.out.println("jsr250-init-method");
}
//@PreDestroy在Bean销毁前执行
@PreDestroy
public void destroy(){
System.out.println("jsr250-destroy-method");
}
}
package com.an.main;
import com.an.config.PrePostConfig;
import com.an.service.bean.BeanWayService;
import com.an.service.bean.JSR250WayService;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
/**
* @description:
* @author: anpeiyong
* @date: Created in 2019/11/19 16:14
* @since:
*/
public class BeanMainTest {
public static void main(String[] args) {
AnnotationConfigApplicationContext annotationConfigApplicationContext=new AnnotationConfigApplicationContext(PrePostConfig.class);
BeanWayService beanWayService=annotationConfigApplicationContext.getBean(BeanWayService.class);
JSR250WayService jsr250WayService=annotationConfigApplicationContext.getBean(JSR250WayService.class);
annotationConfigApplicationContext.close();
}
}
标签：mvn cti ica 概述 str const pen ota void
原文地址：https://www.cnblogs.com/anpeiyong/p/11890348.html
