页面禁止缓存

1. 禁止客户端缓存
   
   
   <META HTTP-EQUIV="pragma" CONTENT="no-cache"> 
   <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
   
   
2. 服务器中禁止缓存
   
   
   response.setHeader("Pragma","No-cache"); 
   response.setHeader("Cache-Control","no-cache"); 
   response.setDateHeader("Expires", 0);