Android|Android 文件上传 Android文件上传

【Android|Android 文件上传】android 文件上传主要有两种方式，HttpUrlConnection上传和Socket上传，
下面贴出实现代码：

public class HttpUploadFileHelper { private final static String TAG = HttpUploadFileHelper.class.getSimpleName(); /** * http 请求消息体中的上传文件边界标识 */ private static final String BOUNDARY = UUID.randomUUID().toString(); /** * 文件类型 */ private static final String CONTENT_TYPE = "multipart/form-data"; private static final String PREFIX = "--"; /** * http 请求消息体中的回车换行 */ private static final String CRLF = "\r\n"; private static final String CHARSET_UTF_8 = "UTF-8"; /** * 表单名 */ private static final String FORM_NAME = "upload_file"; private HttpUploadFileHelper() {}/** * 使用HttpUrlConnection来向服务器上传文件，在上传大文件时，会造成内存溢出 * * @param url * @param filePath * @param listener */ public static void sendByHttpUrlConnection(final String url, final String filePath, final UploadResultListener listener) { if (TextUtils.isEmpty(url) || TextUtils.isEmpty(filePath)) {//校验上传路径和文件 return; }final File uploadFile = new File(filePath); if (uploadFile.exists() && uploadFile.isFile()) { new AsyncTask() {@Override protected Boolean doInBackground(Void... params) {try { StringBuffer headBuffer = new StringBuffer(); //构建文件头部信息 headBuffer.append(PREFIX); headBuffer.append(BOUNDARY); headBuffer.append(CRLF); headBuffer.append("Content-Disposition: form-data; name=\"" + FORM_NAME + "\"; filename=\"" + uploadFile.getName() + "\"" + CRLF); //模仿web上传文件提交一个form表单给服务器，表单名随意起 headBuffer.append("Content-Type: application/octet-stream" + CRLF); //若服务器端有文件类型的校验，必须明确指定Content-Type类型 headBuffer.append(CRLF); Log.i(TAG, headBuffer.toString()); byte[] headBytes = headBuffer.toString().getBytes(); StringBuffer endBuffer = new StringBuffer(); //构建文件结束行 endBuffer.append(CRLF); endBuffer.append(PREFIX); endBuffer.append(BOUNDARY); endBuffer.append(PREFIX); endBuffer.append(CRLF); byte[] endBytes = endBuffer.toString().getBytes(); URL remoteUrl = new URL(url); HttpURLConnection httpURLConnection = (HttpURLConnection) remoteUrl.openConnection(); httpURLConnection.setDoOutput(true); //打开输出流 httpURLConnection.setDoInput(true); //打开输入流 httpURLConnection.setUseCaches(false); httpURLConnection.setRequestMethod("POST"); //上传文件必须要POST请求 httpURLConnection.setRequestProperty("Charset", CHARSET_UTF_8); //设置编码 httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY); //设置http消息头部的Content-Type String contentLength = String.valueOf(headBytes.length + endBytes.length + uploadFile.length()); httpURLConnection.setRequestProperty("Content-Length", contentLength); //设置内容长度OutputStream outputStream = httpURLConnection.getOutputStream(); outputStream.write(headBytes); //输出文件头部FileInputStream fileInputStream = new FileInputStream(uploadFile); byte[] buffer = new byte[1024]; int length; while ((length = fileInputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, length); //输出文件内容 } fileInputStream.close(); outputStream.write(endBytes); //输出结束行 outputStream.close(); if (httpURLConnection.getResponseCode() == 200) {//发送成功 return true; } else { return false; }} catch (MalformedURLException e) { e.printStackTrace(); return false; } catch (IOException e) { e.printStackTrace(); return false; } }@Override protected void onPostExecute(Boolean result) { super.onPostExecute(result); if (listener != null) { if (result) { listener.onSuccess(); } else { listener.onFailure(); } } }}.execute(); } }/** * 使用Socket向服务器上传文件，上传大文件时建议使用Socket，才不会造成内存溢出 * * @param url * @param filePath * @param listener */ public static void sendBySocket(final String url, String filePath, final UploadResultListener listener) { if (TextUtils.isEmpty(url) || TextUtils.isEmpty(filePath)) { return; }final File uploadFile = new File(filePath); if (uploadFile.exists() && uploadFile.isFile()) { new AsyncTask() {@Override protected Boolean doInBackground(Void... params) { try { StringBuffer headBuffer = new StringBuffer(); //构建文件头部信息 headBuffer.append(PREFIX); headBuffer.append(BOUNDARY); headBuffer.append(CRLF); headBuffer.append("Content-Disposition: form-data; name=\"" + FORM_NAME + "\"; filename=\"" + uploadFile.getName() + "\"" + CRLF); //模仿web上传文件提交一个form表单给服务器，表单名随意起 headBuffer.append("Content-Type: application/octet-stream" + CRLF); //若服务器端有文件类型的校验，必须明确指定Content-Type类型 headBuffer.append(CRLF); Log.i(TAG, headBuffer.toString()); byte[] headBytes = headBuffer.toString().getBytes(); StringBuffer endBuffer = new StringBuffer(); //构建文件结束行 endBuffer.append(CRLF); endBuffer.append(PREFIX); endBuffer.append(BOUNDARY); endBuffer.append(PREFIX); endBuffer.append(CRLF); byte[] endBytes = endBuffer.toString().getBytes(); URL remoteUrl = new URL(url); Socket socket = new Socket(remoteUrl.getHost(), remoteUrl.getPort()); OutputStream outputStream = socket.getOutputStream(); PrintStream printStream = new PrintStream(outputStream, true, CHARSET_UTF_8); //输出请求头，用println输出可以省了后面的换行 printStream.println("POST " + url + " HTTP/1.1"); printStream.println("Content-Type: multipart/form-data; boundary=" + BOUNDARY); String contentLength = String.valueOf(headBytes.length + endBytes.length + uploadFile.length()); printStream.println("Content-Length: " + contentLength); printStream.println(); //根据 HTTP 协议，空行将结束头信息outputStream.write(headBytes); //输出文件头部FileInputStream fileInputStream = new FileInputStream(uploadFile); byte[] buffer = new byte[1024]; int length; while ((length = fileInputStream.read(buffer)) != -1) {//输出文件内容 outputStream.write(buffer, 0, length); } fileInputStream.close(); outputStream.write(endBytes); //输出结束行 outputStream.close(); return true; } catch (MalformedURLException e) { e.printStackTrace(); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return false; }@Override protected void onPostExecute(Boolean result) { super.onPostExecute(result); if (listener != null) { if (result) { listener.onSuccess(); } else { listener.onFailure(); } } }}.execute(); }}/** * 监听上传结果 */ public static interface UploadResultListener {/** * 上传成功 */ public void onSuccess(); /** * 上传失败 */ public void onFailure(); } }

对于文件上传需要注意的是，如果是大文件就要采用Socket上传，以免发生OOM，而大文件的上传也可以实现为断点上传，需要服务端配合实现，和断点下载实现类似，也采用RandomAccessFile来做文件移动，具体的断点上传实现代码如下：

客户端：

/** * 上传文件 * @param uploadFile */ private void uploadFile(final File uploadFile) { new Thread(new Runnable() { @Override public void run() { try { uploadbar.setMax((int)uploadFile.length()); String souceid = logService.getBindId(uploadFile); String head = "Content-Length="+ uploadFile.length() + "; filename="+ uploadFile.getName() + "; sourceid="+ (souceid==null? "" : souceid)+"\r\n"; Socket socket = new Socket("192.168.1.78",7878); OutputStream outStream = socket.getOutputStream(); outStream.write(head.getBytes()); PushbackInputStream inStream = new PushbackInputStream(socket.getInputStream()); String response = StreamTool.readLine(inStream); String[] items = response.split("; "); String responseid = items[0].substring(items[0].indexOf("=")+1); String position = items[1].substring(items[1].indexOf("=")+1); if(souceid==null){//代表原来没有上传过此文件，往数据库添加一条绑定记录 logService.save(responseid, uploadFile); } RandomAccessFile fileOutStream = new RandomAccessFile(uploadFile, "r"); fileOutStream.seek(Integer.valueOf(position)); byte[] buffer = new byte[1024]; int len = -1; int length = Integer.valueOf(position); while(start&&(len = fileOutStream.read(buffer)) != -1){ outStream.write(buffer, 0, len); length += len; Message msg = new Message(); msg.getData().putInt("size", length); handler.sendMessage(msg); } fileOutStream.close(); outStream.close(); inStream.close(); socket.close(); if(length==uploadFile.length()) logService.delete(uploadFile); } catch (Exception e) { e.printStackTrace(); } } }).start(); } }

服务端代码如下：

public SocketServer(int port) { this.port = port; // 初始化线程池 executorService = Executors.newFixedThreadPool(Runtime.getRuntime() .availableProcessors() * 50); }// 启动服务 public void start() throws Exception { ss = new ServerSocket(port); while (!quit) { Socket socket = ss.accept(); // 接受客户端的请求 // 为支持多用户并发访问，采用线程池管理每一个用户的连接请求 executorService.execute(new SocketTask(socket)); // 启动一个线程来处理请求 } }// 退出 public void quit() { this.quit = true; try { ss.close(); } catch (IOException e) { e.printStackTrace(); } }public static void main(String[] args) throws Exception { SocketServer server = new SocketServer(7878); server.start(); }private class SocketTask implements Runnable { private Socket socket; public SocketTask(Socket socket) { this.socket = socket; }@Override public void run() { try { System.out.println("accepted connenction from " + socket.getInetAddress() + " @ " + socket.getPort()); PushbackInputStream inStream = new PushbackInputStream( socket.getInputStream()); // 得到客户端发来的第一行协议数据：Content-Length=143253434; filename=xxx.3gp; sourceid= // 如果用户初次上传文件，sourceid的值为空。 String head = StreamTool.readLine(inStream); System.out.println(head); if (head != null) { // 下面从协议数据中读取各种参数值 String[] items = head.split("; "); String filelength = items[0].substring(items[0].indexOf("=") + 1); String filename = items[1].substring(items[1].indexOf("=") + 1); String sourceid = items[2].substring(items[2].indexOf("=") + 1); Long id = System.currentTimeMillis(); FileLog log = null; if (null != sourceid && !"".equals(sourceid)) { id = Long.valueOf(sourceid); log = find(id); //查找上传的文件是否存在上传记录 } File file = null; int position = 0; if(log==null){//如果上传的文件不存在上传记录,为文件添加跟踪记录 String path = new SimpleDateFormat("yyyy/MM/dd/HH/mm").format(new Date()); File dir = new File(uploadPath+ path); if(!dir.exists()) dir.mkdirs(); file = new File(dir, filename); if(file.exists()){//如果上传的文件发生重名，然后进行改名 filename = filename.substring(0, filename.indexOf(".")-1)+ dir.listFiles().length+ filename.substring(filename.indexOf(".")); file = new File(dir, filename); } save(id, file); }else{// 如果上传的文件存在上传记录,读取上次的断点位置 file = new File(log.getPath()); //从上传记录中得到文件的路径 if(file.exists()){ File logFile = new File(file.getParentFile(), file.getName()+".log"); if(logFile.exists()){ Properties properties = new Properties(); properties.load(new FileInputStream(logFile)); position = Integer.valueOf(properties.getProperty("length")); //读取断点位置 } } }OutputStream outStream = socket.getOutputStream(); String response = "sourceid="+ id+ "; position="+ position+ "\r\n"; //服务器收到客户端的请求信息后，给客户端返回响应信息：sourceid=1274773833264; position=0 //sourceid由服务生成，唯一标识上传的文件，position指示客户端从文件的什么位置开始上传 outStream.write(response.getBytes()); RandomAccessFile fileOutStream = new RandomAccessFile(file, "rwd"); if(position==0) fileOutStream.setLength(Integer.valueOf(filelength)); //设置文件长度 fileOutStream.seek(position); //移动文件指定的位置开始写入数据 byte[] buffer = new byte[1024]; int len = -1; int length = position; while( (len=inStream.read(buffer)) != -1){//从输入流中读取数据写入到文件中 fileOutStream.write(buffer, 0, len); length += len; Properties properties = new Properties(); properties.put("length", String.valueOf(length)); FileOutputStream logFile = new FileOutputStream(new File(file.getParentFile(), file.getName()+".log")); properties.store(logFile, null); //实时记录文件的最后保存位置 logFile.close(); } if(length==fileOutStream.length()) delete(id); fileOutStream.close(); inStream.close(); outStream.close(); file = null; } } catch (Exception e) { e.printStackTrace(); } finally { try { if(socket != null && !socket.isClosed()) socket.close(); } catch (IOException e) {} } }}

最后是目前使用的OKHTTP上传文件代码：

//通过“addFormDataPart”可以添加多个上传的文件。 publicclass OkHttpCallBackWrap { public void post(String url) throws IOException{ File file = new File("D:/app/dgm/3.mp4"); RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); RequestBody requestBody = new MultipartBody.Builder() .setType(MultipartBody.FORM) .addFormDataPart("application/octet-stream", "1.mp4", fileBody) .build(); Request request = new Request.Builder() .url(url) .post(requestBody) .build(); final okhttp3.OkHttpClient.Builder httpBuilder = new OkHttpClient.Builder(); OkHttpClient okHttpClient= httpBuilder //设置超时 .connectTimeout(100, TimeUnit.SECONDS) .writeTimeout(150, TimeUnit.SECONDS) .build(); okHttpClient.newCall(request).enqueue(new Callback() {@Override public void onResponse(Call call, Response response) throws IOException { System.out.println(response.body().string()); }@Override public void onFailure(Call arg0, IOException e) { // TODO Auto-generated method stub System.out.println(e.toString()); }}); } }