禁止浏览器缓存

禁止浏览器缓存

html

   < meta  http-equiv ="pragma"  content ="no-cache" >
   < meta  http-equiv ="cache-control"  content ="no-cache" >
   < meta  http-equiv ="expires"  content ="0" >

servlet

          response.setHeader( " pragma " , " no-cache " );
          response.setHeader( " cache-control " , " no-cache " );
          response.setDateHeader( " expires " ,  0 );