上传多个图像文件使用HttpURLConnection

我想使用HttpURLConnection上传多个图像文件,并且图像数量不固定到从android上传多less个文件。

请不要发送MultiPartEntity.I的链接,只是想用HttpURLConnection完成此操作,而不想使用任何其他外部库来上传文件。

我想用HTTPUrlConnection上传文件,例如请参考这个链接

http://www.17od.com/2010/02/18/multipart-form-upload-on-android/

这是单个file upload代码,我想上传多个

并请以php脚本为例。

Solutions Collecting From Web of "上传多个图像文件使用HttpURLConnection"

是的,最后我得到了答案。

在android侧。

Fileuploader.java

public class FileUploader { private final String boundary; private static final String LINE_FEED = "\r\n"; private HttpURLConnection httpConn; private String charset; private OutputStream outputStream; private PrintWriter writer; public FileUploader(String requestURL, String charset) throws IOException { this.charset = charset; // creates a unique boundary based on time stamp boundary = "===" + System.currentTimeMillis() + "==="; URL url = new URL(requestURL); httpConn = (HttpURLConnection) url.openConnection(); httpConn.setUseCaches(false); httpConn.setDoOutput(true); // indicates POST method httpConn.setDoInput(true); httpConn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); httpConn.setRequestProperty("User-Agent", "CodeJava Agent"); httpConn.setRequestProperty("Test", "Bonjour"); outputStream = httpConn.getOutputStream(); writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), true); } /** * Adds a form field to the request * @param name field name * @param value field value */ public void addFormField(String name, String value) { writer.append("--" + boundary).append(LINE_FEED); writer.append("Content-Disposition: form-data; name=\"" + name + "\"") .append(LINE_FEED); writer.append("Content-Type: text/plain; charset=" + charset).append( LINE_FEED); writer.append(LINE_FEED); writer.append(value).append(LINE_FEED); writer.flush(); } /** * Adds a upload file section to the request * @param fieldName name attribute in <input type="file" name="..." /> * @param uploadFile a File to be uploaded * @throws IOException */ public void addFilePart(String fieldName, File uploadFile) throws IOException { String fileName = uploadFile.getName(); writer.append("--" + boundary).append(LINE_FEED); writer.append( "Content-Disposition: form-data; name=\"" + fieldName + "\"; filename=\"" + fileName + "\"") .append(LINE_FEED); writer.append( "Content-Type: " + URLConnection.guessContentTypeFromName(fileName)) .append(LINE_FEED); writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED); writer.append(LINE_FEED); writer.flush(); FileInputStream inputStream = new FileInputStream(uploadFile); byte[] buffer = new byte[4096]; int bytesRead = -1; while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } outputStream.flush(); inputStream.close(); writer.append(LINE_FEED); writer.flush(); } /** * Adds a header field to the request. * @param name - name of the header field * @param value - value of the header field */ public void addHeaderField(String name, String value) { writer.append(name + ": " + value).append(LINE_FEED); writer.flush(); } /** * Completes the request and receives response from the server. * @return a list of Strings as response in case the server returned * status OK, otherwise an exception is thrown. * @throws IOException */ public List<String> finish() throws IOException { List<String> response = new ArrayList<String>(); writer.append(LINE_FEED).flush(); writer.append("--" + boundary + "--").append(LINE_FEED); writer.close(); // checks server's status code first int status = httpConn.getResponseCode(); if (status == HttpURLConnection.HTTP_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader( httpConn.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { response.add(line); } reader.close(); httpConn.disconnect(); } else { throw new IOException("Server returned non-OK status: " + status); } return response; } } 

在mainactivity文件上

关于mainactivity.java只是调用这个函数,imgPaths是图像path的数组。

  public void uploadFile(ArrayList<String> imgPaths) { String charset = "UTF-8"; //File uploadFile1 = new File("e:/Test/PIC1.JPG"); //File uploadFile2 = new File("e:/Test/PIC2.JPG"); File sourceFile[] = new File[imgPaths.size()]; for (int i=0;i<imgPaths.size();i++){ sourceFile[i] = new File(imgPaths.get(i)); // Toast.makeText(getApplicationContext(),imgPaths.get(i),Toast.LENGTH_SHORT).show(); } String requestURL = "your API"; try { FileUploader multipart = new FileUploader(requestURL, charset); multipart.addHeaderField("User-Agent", "CodeJava"); multipart.addHeaderField("Test-Header", "Header-Value"); multipart.addFormField("description", "Cool Pictures"); multipart.addFormField("keywords", "Java,upload,Spring"); for (int i=0;i<imgPaths.size();i++){ multipart.addFilePart("uploaded_file[]", sourceFile[i]); } /*multipart.addFilePart("fileUpload", uploadFile1); multipart.addFilePart("fileUpload", uploadFile2);*/ List<String> response = multipart.finish(); System.out.println("SERVER REPLIED:"); for (String line : response) { System.out.println(line); } } catch (IOException ex) { System.err.println(ex); } } 

uploader.php

 foreach ($_FILES["uploaded_file"]["error"] as $key => $error) { if ($error == UPLOAD_ERR_OK) { $tmp_name = $_FILES["uploaded_file"]["tmp_name"][$key]; $name = $_FILES["uploaded_file"]["name"][$key]; $file_path = "../post_uploaded_images/"; $file_path = $file_path . $name; if(@move_uploaded_file($tmp_name, $file_path)) { echo "success"; } else{ echo "fail"; } } }