http发送图片，字节数组的方式

1.根据HttpURLConnection上传

public static JSONObject httpUploadImg(String postUrl,byte[] imgBuffer){URL url = new URL(postUrl);StringBuffer buffer = new StringBuffer();HttpURLConnection conn = (HttpURLConnection) url.openConnection();String boundary = "--------httpUploadImg";Map<String , byte[]> byteparams = new HashMap<String, byte[]>();DataOutputStream ds;StringBuilder sb = new StringBuilder();conn.setDoOutput(true);conn.setUseCaches(false);conn.setConnectTimeout(CONNECTION_TIMEOUT);conn.setRequestMethod("POST");conn.setRequestProperty("Content-Type", sb.append("multipart/form-data; boundary=").append(boundary).toString());byteparams.put("null.jpg", imgBuffer);try        {            conn.connect();        }        catch(SocketTimeoutException e)        {            throw new RuntimeException();        }ds = new DataOutputStream(conn.getOutputStream());writeByteParams(ds, byteparams, boundary);paramsEnd(ds, boundary);InputStream inputStream = conn.getInputStream();InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String str = null;while ((str = bufferedReader.readLine()) != null) {buffer.append(str);}bufferedReader.close();inputStreamReader.close();// 释放资源inputStream.close();inputStream = null;conn.disconnect();JSONObject jsonObject = (JSONObject) JSONValue.parse(buffer.toString());return jsonObject;}

private static void writeByteParams(DataOutputStream ds, Map<String , byte[]> byteparams, String boundary) throws Exception{Set keySet = byteparams.keySet();for(Iterator it = keySet.iterator(); it.hasNext(); ds.writeBytes("\r\n")){String name = (String)it.next();byte[] value = (byte[])byteparams.get(name);ds.writeBytes((new StringBuilder()).append("--").append(boundary).append("\r\n").toString());            ds.writeBytes((new StringBuilder()).append("Content-Disposition: form-data; name=\"file\"; filename=\"").append(URLEncoder.encode(name, "UTF8")).append("\"\r\n").toString());            //是jpg的格式            ds.writeBytes((new StringBuilder()).append("Content-Type: img/jpg").append("\r\n").toString());            ds.writeBytes("\r\n");            ds.write(value);}}private static void paramsEnd(DataOutputStream ds, String boundary)throws Exception    {        ds.writeBytes((new StringBuilder()).append("--").append(boundary).append("--").append("\r\n").toString());        ds.writeBytes("\r\n");    }

2.httpClient发送图片

public static JSONObject httpUploadImg(String postUrl,byte[] imgBuffer){HttpPost httpPost = new HttpPost(postUrl);MultipartEntityBuilder mpEntity = MultipartEntityBuilder.create();mpEntity.addBinaryBody("upfile", imgBuffer, ContentType.DEFAULT_BINARY, "null.jpg");httpPost.setEntity(mpEntity.build());// 创建默认的httpClient实例.            CloseableHttpClient httpclient = HttpClients.createDefault();  HttpResponse response;StringBuilder string = new StringBuilder();try {response = httpclient.execute(httpPost);HttpEntity resEntity = response.getEntity();BufferedReader in = new BufferedReader(new InputStreamReader(resEntity.getContent()));    String inputLine = null;    while((inputLine = in.readLine()) != null){string.append(inputLine);}in.close();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{try {httpclient.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}JSONObject jsonObject = (JSONObject) JSONValue.parse(string.toString());return jsonObject;}