@PostConstruct与@PreDestroy笔记

本文主要是介绍@PostConstruct与@PreDestroy笔记，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

自测后执行顺序与网上有些不同。

1、构造函数

2、@PostConstruct

3、init

4、@PreDestroy

5、destroy

具体测试类：

package com.sunshine.shine.Test.PostConstructTest;import org.springframework.stereotype.Component;@Component
public class Eraser {public String name="oneEraser";public String desName="oh my god";
}

package com.sunshine.shine.Test.PostConstructTest;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.time.LocalDateTime;@Component
public class Pencil {@Autowiredprivate Eraser eraser;Pencil(){System.out.println("=====构造=====");}@PostConstructpublic void initPencil(){System.out.println("===== my eraser ====="+eraser.name);}public void init(){System.out.println("===== init =====");}@PreDestroypublic void desPencil(){System.out.println("===== destory ====="+eraser.desName);}public void destroy(){System.out.println("==== destroy =====");}
}

package com.sunshine.shine.Test.PostConstructTest;import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;@Component
public class PostConstruct {//    @Autowired
//    private@Bean(initMethod = "init",destroyMethod = "destroy")public Pencil pencil(){return new Pencil();}
}

执行结果：