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public static String filenameEncoding(String filename, HttpServletRequest request) throws IOException {String agent = request.getHeader("User-Agent"); //获取浏览器if (agent.contains("Firefox")) {Encoder base64Encoder = Base64.getEncoder();filename = "=?utf-8?B?"+ base64Encoder.encodeToString(filename.getBytes("utf-8"))+ "?=";} else if(agent.contains("MSIE")) {filename = URLEncoder.encode(filename, "utf-8");} else {filename = URLEncoder.encode(filename, "utf-8");}return filename;}