Android通过HttpURLConnection上传多个文件至服务器 - 流传输
16lz
2021-01-23
上传单个文件：
public static void uploadFile(final File file, final String url, final Handler handler, final HttpCallbackListener listener){ new Thread(new Runnable() { @Override public void run() { String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成 String PREFIX = "--" , LINE_END = "\r\n"; String CONTENT_TYPE = "multipart/form-data"; //内容类型 try { URL httpUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection(); conn.setReadTimeout(5000); conn.setConnectTimeout(5000); conn.setDoInput(true); //允许输入流 conn.setDoOutput(true); //允许输出流 conn.setUseCaches(false); //不允许使用缓存 conn.setRequestMethod("POST"); //请求方式 conn.setRequestProperty("Charset", "UTF-8"); //设置编码 conn.setRequestProperty("connection", "keep-alive"); conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY); if(file!=null) { OutputStream outputSteam=conn.getOutputStream(); DataOutputStream dos = new DataOutputStream(outputSteam); StringBuffer sb = new StringBuffer(); sb.append(PREFIX); sb.append(BOUNDARY); sb.append(LINE_END); sb.append("Content-Disposition: form-data; name=\"img\"; filename=\"" + file.getName()+"\""+LINE_END); sb.append("Content-Type: application/octet-stream; charset="+ "UTF-8" +LINE_END); sb.append(LINE_END); dos.write(sb.toString().getBytes()); InputStream is = new FileInputStream(file); byte[] bytes = new byte[1024]; int len = 0; while((len=is.read(bytes))!=-1) { dos.write(bytes, 0, len); } is.close(); dos.write(LINE_END.getBytes()); byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes(); dos.write(end_data); dos.flush(); /** * 获取响应码 200=成功 * 当响应成功，获取响应的流 */ int res = conn.getResponseCode(); // Log.e(TAG, "response code:"+res); if(res==200){ listener.onFinish(res); } } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return; } }).start(); }上传多个文件：
public static void uploadFile(final List files, final String url, final Handler handler, final HttpCallbackListener listener){ new Thread(new Runnable() { @Override public void run() { String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成 String PREFIX = "--" , LINE_END = "\r\n"; String CONTENT_TYPE = "multipart/form-data"; //内容类型 try { URL httpUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection(); conn.setReadTimeout(5000); conn.setConnectTimeout(5000); conn.setDoInput(true); //允许输入流 conn.setDoOutput(true); //允许输出流 conn.setUseCaches(false); //不允许使用缓存 conn.setRequestMethod("POST"); //请求方式 conn.setRequestProperty("Charset", "UTF-8"); //设置编码 conn.setRequestProperty("connection", "keep-alive"); conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY); // if(files.size()!= 0) { /** * 当文件不为空，把文件包装并且上传 */ OutputStream outputSteam=conn.getOutputStream(); DataOutputStream dos = new DataOutputStream(outputSteam); for(int i = 0; i < files.size(); i++){ StringBuffer sb = new StringBuffer(); sb.append(PREFIX); sb.append(BOUNDARY); sb.append(LINE_END); sb.append("Content-Disposition: form-data; name=\"img" + i + "\"; filename=\"" + files.get(i).getName()+"\""+LINE_END); //sb.append("Content-Type: application/octet-stream; charset="+ "UTF-8" +LINE_END); sb.append(LINE_END); dos.write(sb.toString().getBytes()); InputStream is = new FileInputStream(files.get(i)); byte[] bytes = new byte[1024]; int len = -1; while((len=is.read(bytes))!=-1) { dos.write(bytes, 0, len); } dos.write(LINE_END.getBytes()); is.close(); } byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes(); dos.write(end_data); dos.flush(); /** * 获取响应码 200=成功 * 当响应成功，获取响应的流 */ int res = conn.getResponseCode(); // Log.e(TAG, "response code:"+res); if(res==200){ listener.onFinish(res); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return; } }).start(); } 注意填写字节流的时候与单张图片的区别。
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