jsp頁面禁止緩衝設定
1.用戶端緩衝要在<head>中加入類似如下內容：
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">
或
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
2.在伺服器的動態網頁中禁止緩衝，要加入類似如下指令碼
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
3.設定有限時間的緩衝
int minutes = 10;
Date d = new Date();
String modDate = d.toGMTString();
String expDate = null;
expDate = (new Date(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
建議：jsp cache最好做在過濾器上,把需要緩衝的頁面集中在同一個目錄下,每次更改只須更改web.xml就可以完成緩衝設定,這樣比較方便.
4.最後如果以上方法都不行的話，就在你的正常的URL後面加上一個尾巴
在JS中就選擇
var timestamp = (new Date()).valueOf();
URL+"×tamp="+timestamp;
在Java代碼中就選擇
long timestamp=new Date().getTime();
URL+"×tamp="+timestamp;
這樣的話，你的URL始終都在變化，自然瀏覽器就得老老實實的進行更新了，它也無緩衝可拿了。
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