Spring Bean垃圾回收

• 覆盖对象的finalize

finalize()并不是必须要执行的，它只能执行一次或者0次。

Spring Bean垃圾回收肯定是在关闭Spring上下文之后.

Rumenz.java

1package com.rumenz;
2
3public class Rumenz {
4    public void print(){
5        System.out.println(".......");
6    }
7    //覆盖finalize方法
8    @Override
9    public void finalize() throws Throwable {
10        System.out.println("Rumenz对象被回收");
11    }
12}
13

DemoApplication.java

1package com.rumenz;
2
3
4import org.springframework.context.annotation.AnnotationConfigApplicationContext;
5import org.springframework.context.annotation.Bean;
6
7
8public class DemoApplication {
9    public static  void main(String[] args) throws InterruptedException {
10        AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext();
11
12        ac.register(DemoApplication.class);
13
14        //启动Spring上下文
15        ac.refresh();
16        //关闭Spring上下文
17        ac.close();
18        System.out.println("Spring上下文已关闭");
19        Thread.sleep(5000L);
20        //强制进行GC是为了观察回收过程
21        System.gc();
22        Thread.sleep(5000L);
23    }
24
25    @Bean("rumenzz")
26    public static Rumenz rumenz(){
27        Rumenz rumenz = new Rumenz();
28        return rumenz;
29    }
30
31}
32

输出

1Spring上下文已关闭
2Rumenz对象被回收

由于finalize不是每次一定会被调用,如果没有结果需要多运行几次. 原文: https://rumenz.com/rumenbiji/Spring-Bean-GC.html