/*** 文件上傳* @param actionUrl:上傳接口地址* @param files:需上傳的文件集合* @return* @throws IOException*/ public static String upLoadFilePost(String actionUrl, Map<String, File> files) throws IOException {String BOUNDARY = java.util.UUID.randomUUID().toString();String PREFIX = "--", LINEND = "\r\n";String MULTIPART_FROM_DATA = "multipart/form-data";String CHARSET = "UTF-8";URL uri = new URL(actionUrl);HttpURLConnection conn = (HttpURLConnection) uri.openConnection();conn.setReadTimeout(5 * 1000);conn.setDoInput(true);// 允許輸入conn.setDoOutput(true);// 允許輸出conn.setUseCaches(false);conn.setRequestMethod("POST"); // Post方式conn.setRequestProperty("connection", "keep-alive");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA+ ";boundary=" + BOUNDARY);DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());// 發送文件數據if (files != null)for (Map.Entry<String, File> file : files.entrySet()) {StringBuilder sb1 = new StringBuilder();sb1.append(PREFIX);sb1.append(BOUNDARY);sb1.append(LINEND);sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""+ file.getKey() + "\"" + LINEND);sb1.append("Content-Type: application/octet-stream; charset="+ CHARSET + LINEND);sb1.append(LINEND);outStream.write(sb1.toString().getBytes());InputStream is = new FileInputStream(file.getValue());byte[] buffer = new byte[1024];int len = 0;while ((len = is.read(buffer)) != -1) {outStream.write(buffer, 0, len);}is.close();outStream.write(LINEND.getBytes());}// 請求結束標志byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();outStream.write(end_data);outStream.flush();// 得到響應碼int res = conn.getResponseCode();if (res == 200) {InputStream in = conn.getInputStream();InputStreamReader isReader = new InputStreamReader(in);BufferedReader bufReader = new BufferedReader(isReader);String line = "";String data = "";while ((line = bufReader.readLine()) != null) {data += line;}outStream.close();conn.disconnect();return data;}outStream.close();conn.disconnect();return ""; }

PS：在子線程中調用。

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