2.用setHeader("refresh"...跳转：
马克-to-win：使用response对象的setHeader（）方法可以实现在某个时间点跳转到某个页面的作用。比如response.setHeader("refresh",60);可以实现六十秒以后，又一次访问当前页面。而response.setHeader("refresh","3;URL=http://localhost:8080/ServletHello/cookie.html"); 实现3秒后访问新页面：http://localhost:8080/ServletHello/cookie.html。
例：3.2.1
package com;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DeleteCookie extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setHeader("refresh","2;URL=http://localhost:8080/ServletHello/cookie.html");
}
}
更多请看：https://blog.csdn.net/qq_44594371/article/details/103163870
