【下载文档:  JSP实例教程Servlet解决网页缓存问题.txt 】

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JSP 开发之Servlet解决网页缓存问题
JSP 开发之Servlet解决网页缓存问题
（1）我们为什么要防止游览器页面缓存的问题：
所以在不需要缓存的页面中需要实现不缓存页面；
代码如下：
package com.lc.HttpTest;
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;
public class CacheJiejue extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//指定该页面不缓存
response.setDateHeader("Expires",-1); //IE游览器支持的
//保证兼容性
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragme", "no-cache");
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
}
（2）但是如果要实现特定时间内的页面缓存 则代码如下：
package com.lc.HttpTest;
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;
public class CacheJiejue extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//指定该页面不缓存
//response.setDateHeader("Expires",-1); //IE游览器支持的
//缓存一定的时间 缓存 一天的时间
response.setDateHeader("Expires",System.currentTimeMillis()+3600*1000*24);
//保证兼容性
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragme", "no-cache");
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
}
以上就是Servlet解决网页缓存的实例详解，如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！