servlet--禁用浏览器缓存

response.setHeader("Cache-Control", "no-cache");
		response.setHeader("pragma", "no-cache");
		response.setDateHeader("expires", -1);
		response.getWriter().print("hello hello!");

<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">