设置浏览器和缓存服务器不缓存页面信息

//浏览器和缓存服务器都不应该缓存页面信息
//java
httpServletResponse.setHeader("Pragma", "No-cache");
httpServletResponse.setHeader("Cache-Control", "no-cache");
httpServletResponse.setDateHeader("Expires", 0);

//jsp
<％
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
％>

//html




//ajax
xhr.setRequestHeader("If-Modified-Since","0");
xhr.setRequestHeader("Cache-Control","no-cache");