JSP禁用缓存常用方法
MusicPeng 2013-10-24
JSP禁用缓存常用方法
jsp页面禁止缓存设置
1.客户端缓存要在<head>中加入类似如下内容：
<METAHTTP-EQUIV="pragma"CONTENT="no-cache">
<METAHTTP-EQUIV="Cache-Control"CONTENT="no-cache,must-revalidate">
<METAHTTP-EQUIV="expires"CONTENT="Wed,26Feb199708:21:57GMT">
或
<metahttp-equiv="pragma"content="no-cache">
<metahttp-equiv="cache-control"content="no-cache">
<metahttp-equiv="expires"content="0">
2.在服务器的动态网页中禁止缓存，要加入类似如下脚本
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0);
3.设置有限时间的缓存
intminutes=10;
Dated=newDate();
StringmodDate=d.toGMTString();
StringexpDate=null;
expDate=(newDate(d.getTime()+minutes*60000)).toGMTString();
response.setHeader("Last-Modified",modDate);
response.setHeader("Expires",expDate);
response.setHeader("Cache-Control","public");//HTTP/1.1
response.setHeader("Pragma","Pragma");//HTTP/1.0
建议：jspcache最好做在过滤器上,把需要缓冲的页面集中在同一个目录下,每次更改只须更改web.xml就可以完成缓冲设置,这样比较方便.
