随TOMCAT启动 启动一个线程

建立一个类,
实现ServletContextListener接口
在web.xml里加上监听

import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;public class socketMain implements ServletContextListener {    @Override    public void contextInitialized(ServletContextEvent sce) {        new   MyThread().start();    }    @Override    public void contextDestroyed(ServletContextEvent sce) {    }    class   MyThread   extends   Thread    {        public   void   run()        {            System.out.println("测试开始");        }    }}

web.xml加上

<listener>    <listener-class>com.calanger.app.admin.websocket.socketMain</listener-class>  </listener>