清空瀏覽器緩存

1. 增加清除遊覽器緩存方法

response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setHeader("Cache-Control", "no-store");
		response.setDateHeader("Expires", 0);
		response.setCharacterEncoding("UTF-8");