一文带你了解SpringBoot的停机方式

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
      ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);

      try {
         TimeUnit.SECONDS.sleep(10);
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
      //启动10秒以后，自动关闭
      context.close();
    }
}

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);

        try {
            TimeUnit.SECONDS.sleep(5);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //5秒后，关闭服务
        exitApplication(context);
    }

    public static void exitApplication(ConfigurableApplicationContext context) {
     //获取退出码
        int exitCode = SpringApplication.exit(context, (ExitCodeGenerator) () -> 0);
        //退出码传递给jvm，安全退出程序
        System.exit(exitCode);
    }

}

@Component
public class AppListener implements CommandLineRunner, DisposableBean {

    @Override
    public void run(String... args) throws Exception {
        System.out.println("应用启动成功，预加载相关数据");
    }

    @Override
    public void destroy() throws Exception {
        System.out.println("应用正在关闭，清理相关数据");
    }

}

@Component
public class AppDestroyConfig {

    @PreDestroy
    public void PreDestroy(){
        System.out.println("应用程序正在关闭。。。");
    }
}

@Component
public class JobTaskListener implements ApplicationListener {

    @Override
    public void onApplicationEvent(ApplicationEvent applicationEvent) {
        // 在spring bean容器销毁之前执行的事件，防止数据库连接池在任务终止前销毁
        if (applicationEvent instanceof ContextClosedEvent) {
            System.out.println("关闭相关的定时任务");
        }
    }
}