【JSP开发】response的页面定时跳转和控制浏览器缓存

页面定时跳转

package cn.edu.Response;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;

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

public class ResponseDemo5 extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//假设这是一个处理用户登录的servlet

		//假设程序运行到此，用户登陆成功了
		String message="<meta http-equiv='refresh' content='3;url=/day06/index.jsp'>恭喜你，登陆成功，本页面将在3秒内跳转，若没有跳转，请点击<a href='/day06/index.jsp'>超链接</a>";
		this.getServletContext().setAttribute("message",message);
		this.getServletContext().getRequestDispatcher("/message.jsp").forward(request, response);

	}

	private void text2(HttpServletResponse response) throws IOException {
		//假设这是一个处理用户登录的servlet

		//假设程序运行到此，用户登陆成功了
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		response.setHeader("refresh", "3;url='/day06/index.jsp'");
		response.getWriter().write("恭喜你，登陆成功，本页面将在3秒内跳转，若没有跳转，请点击<a href='/day06/index.jsp'>超链接</a>");
	}

	private void text1(HttpServletResponse response) throws IOException {
		response.setHeader("refresh", "3");
		String data = new Random().nextInt(10000) + "";
		response.getWriter().write(data);
	}

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

}

控制浏览器缓存

package cn.edu.Response;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//控制浏览器缓存
public class ResponseDemo6 extends HttpServlet {

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

		response.setDateHeader("expires", System.currentTimeMillis()+1000*3600);
		String data="aaaaaaaaaaaa";
		response.getWriter().write(data);
	}

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

       doGet(request,response);
	}

}