J2EE中使用Filter過濾器清除網頁緩衝

package www.csdn.dbshop.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletResponse;public class CacheFilter implements Filter {public void init(FilterConfig filterConfig) throws ServletException {System.out.println("初始化");}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {// response對象HttpServletResponse res = (HttpServletResponse) response;// 設定網頁的到期時間，一旦到期則必須到伺服器上重新調用res.setDateHeader("Expires", -1);// Cache-Control 指定請求和響應應遵循的緩衝機制 no-cache指示請求或響應訊息是不能緩衝的res.setHeader("Cache-Control", "no-cache");// 用於設定禁止瀏覽器從本機快取中調用頁面內容，設定後一旦離開頁面就無法從Cache中再調出res.setHeader("Pragma", "no-cache");// 允許存取chain.doFilter(request, res);}public void destroy() {System.out.println("銷毀");}}

原帖地址：http://blog.csdn.net/qxs965266509/article/details/8848856