类似%E4%B8%AD%E5%9B%BD这种字符转换问题
服务器端：String encodeStr = URLEncoder.encode("中国", "utf-8"); System.out.println("处理后:" + encodeStr); //处理后:%E4%B8%AD%E5%9B%BD 客户端：String decodeStr = URLDecoder.decode(encodeStr, "utf-8
