使用HttpUrlConnection上传文件，tomcat已在server.xml设置编码为UTF-8 部分请求代码如下 这种情况下，临时附件的中文文件名还是出现了乱码，看以前的回复都是设置环境，请问该如何设置，或是需要添加什么请求头吗？ URL url = new URL(uploadUrl); connection = (HttpURLConnection) url.openConnection(); connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); connection.setRequestMethod("POST"); connection.setConnectTimeout(UPLOAD_TIME_OUT); connection.setReadTimeout(UPLOAD_TIME_OUT); connection.setRequestProperty("Charset", "UTF-8"); connection.setRequestProperty("connection", "keep-alive"); connection.setRequestProperty("Content-Type", "multipart/form-data" + ";boundary=" + boundary); connection.setRequestProperty("Content-Length", String.valueOf(fileSize)); dos = new DataOutputStream(connection.getOutputStream()); StringBuilder sb = new StringBuilder(); sb.append(PREFIX); sb.append(boundary); sb.append(LINE_END); String s = "Content-Disposition: form-data; name=\"media\"; filename=\"" + fileName + "\"" + LINE_END; sb.append(s); sb.append("Content-Type: application/octet-stream; charset=" + CHARSET_DEFAULT + LINE_END); sb.append(LINE_END); dos.write(sb.toString().getBytes()); byte[] bytes = new byte[8 * 1024]; int len = 0; while ((len = is.read(bytes)) != -1) { dos.write(bytes, 0, len); } dos.write(LINE_END.getBytes()); byte[] end_data = (PREFIX + boundary + PREFIX + LINE_END).getBytes(); dos.write(end_data); dos.flush();