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有3 个HTTP 响应头字段都可以禁止浏览器缓存当前页面,它们在 Servlet 中的示例代码如下:
1 response.setDateHeader("Expires",-1);
2 response.setHeader("Cache-Control","no-cache");
3 response.setHeader("Pragma","no-cache");
并不是所有的浏览器都能完全支持上面的三个响应头,因此最好是同时使用上面的三个响应头。
1 package me.gacl.web.filter;
2
3 import java.io.IOException;
4
5 import javax.servlet.Filter;
6 import javax.servlet.FilterChain;
7 import javax.servlet.FilterConfig;
8 import javax.servlet.ServletException;
9 import javax.servlet.ServletRequest;
10 import javax.servlet.ServletResponse;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13
14 /**
15 * @ClassName: NoCacheFilter
16 * @Description: 禁止浏览器缓存所有动态页面
17 * @author: 孤傲苍狼
18 * @date: 2014-8-31 下午11:25:40
19 *
20 */
21 public class NoCacheFilter implements Filter {
22
23
24 public void doFilter(ServletRequest req, ServletResponse resp,
25 FilterChain chain) throws IOException, ServletException {
26 //把ServletRequest强转成HttpServletRequest
27 HttpServletRequest request = (HttpServletRequest) req;
28 //把ServletResponse强转成HttpServletResponse
29 HttpServletResponse response = (HttpServletResponse) resp;
30 //禁止浏览器缓存所有动态页面
31 response.setDateHeader("Expires", -1);
32 response.setHeader("Cache-Control", "no-cache");
33 response.setHeader("Pragma", "no-cache");
34
35 chain.doFilter(request, response);
36 }
37
38 public void init(FilterConfig filterConfig) throws ServletException {
39
40 }
41
42 public void destroy() {
43
44 }
45 }
web.xml文件中的配置如下:
1 <filter>
2 <filter-name>NoCacheFilter</filter-name>
3 <filter-class>me.gacl.web.filter.NoCacheFilter</filter-class>
4 </filter>
5
6 <filter-mapping>
7 <filter-name>NoCacheFilter</filter-name>
8 <!--只拦截Jsp请求-->
9 <servlet-name>*.jsp</servlet-name>
10 </filter-mapping>
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原文地址:http://www.cnblogs.com/Java-Iverson/p/5099492.html