Servlet启程:防止页面被客户端缓存

HttpServlet可通过设置特定HTTP响应头来禁止客户端缓存页面,以下示范代码中的response变量引用HttpServletResponse对象:

response.addHeader("Pragma","no-cache");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Expires","0");