如何捕捉关闭tomcat的事件？

Question

我想要的是每次tomcat服务器启动时都启动一个线程。为此，我需要捕获关闭tomcat的事件。我可以这样做吗？我尝试使用会话来做但有时候会话甚至在关闭后仍然存在下来并重申tomcat？我的选择是什么？

Answer 1

You can try to catch an JVM shutdown event in this way:

    Runtime.getRuntime().addShutdownHook(new Thread() {

        public void run() {
            System.out.println("BYE BYE");
        }
    });

The other option is to implement ServletContextListener by using @WebListener Annotation. No xml configuration is required in this case.

@WebListener
public class MyLifeCycleListener implements ServletContextListener {

      public void contextInitialized(ServletContextEvent event) {
          //TODO ON START
      }

      public void contextDestroyed(ServletContextEvent event) {
          //TODO ON DESTROY
      }
}