在Servlet的init方法中创建线程

 servlet代码如下：

package com.weichat.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//测试执行线程的类
public class TestRunThreadServlet extends HttpServlet implements Runnable{
	
	//init servlet
	public void init() throws ServletException {
		System.out.println("开始init...");
		Thread thread = new Thread(new TestRunThreadServlet());
		thread.start();
	}
	//业务类
	public void threadMethod(){
		System.out.println("start thread");
		try {
			System.out.println("线程开始休眠");	
			Thread.sleep(1000*3);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		System.out.println("本次执行完毕");
	}
	@Override
	public void run() {
		while(true){
			threadMethod();
		}
	}
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println("come in post");
		
		System.out.println("go out post");
	}
}

　　

web.xml中添加servlet注册

 	<servlet>  
        <servlet-name>TestRunThreadServlet </servlet-name>  
        <display-name>TestRunThreadServlet </display-name>  
        <servlet-class>com.hseact.fecp.servlet.TestRunThreadServlet </servlet-class>  
        <load-on-startup>1</load-on-startup>  
	</servlet>