服务端控制各种浏览器禁止缓存页面资源 学习笔记

Posted 2020-10-31

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 Demo2 extends HttpServlet {

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

                //服务端控制各种浏览器禁止缓存页面资源
                response.setHeader("expires","-1");
                response.setHeader("cache-control","no-cache");
                response.setHeader("pragma","no-cache");

                //服务端向浏览器输出内容
                response.getWriter().write("haha");             

    }

}

总结：
想让浏览器有何种行为，服务端只能通过响应头的方式来设置
想让服务器知道何种行为，浏览器只能通过请求头的方式来设置