servlet-响应的定时刷新

 

package servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * 案例- 定时刷新
 * @author Administrator
 *
 */
public class ResponseDemo3 extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        /*
         * 定时刷新
         * 原理：浏览器认识refresh头，得到refresh头之后重新请求当前资源
         */
        //response.setHeader("refresh", "1"); // 每隔1秒刷新次页面
        
        /*
         * 隔n秒之后跳转另外的资源
         */
        response.setHeader("refresh", "5, url=/day09/adv.html");
    }

}