response:用Expires控制浏览器的缓存

response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setDateHeader("expires", System.currentTimeMillis()+1000*3600);
String data="小贱人";
response.getWriter().write(data);

--------------------------------------------------

禁用浏览器缓存：

response.setHeader("Cache-Control", "no-cache");
response.setHeader("pragma", "no-cache");
response.setIntHeader("expries", -1);

--------------------------------------

在index.jsp文件中:

<meta></meta>里面的内容，可以充当响应头