java实现新浪微博Oauth接口发送图片和文字的方法

/**
* 发表带图片的微博
* @param token
* @param tokenSecret
* @param aFile
* @param status
* @param urlPath
* @return
*/
public String uploadStatus(String token, String tokenSecret, File aFile, String status, String urlPath) {
  httpOAuthConsumer = new DefaultOAuthConsumer(consumerKey,consumerSecret);
  httpOAuthConsumer.setTokenWithSecret(token,tokenSecret);
  String result = null;
  try {
   URL url = new URL(urlPath);
   HttpURLConnection request = (HttpURLConnection) url.openConnection();
   request.setDoOutput(true);
   request.setRequestMethod("POST");
   HttpParameters para = new HttpParameters();
   para.put("status", URLEncoder.encode(status,"utf-8").replaceAll("\\+", "%20"));
   String boundary = "---------------------------37531613912423";
   String content = "--"+boundary+"\r\nContent-Disposition: form-data; name=\"status\"\r\n\r\n";
   String pic = "\r\n--"+boundary+"\r\nContent-Disposition: form-data; name=\"pic\"; filename=\"image.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";
   byte[] end_data = ("\r\n--" + boundary + "--\r\n").getBytes();
   FileInputStream stream = new FileInputStream(aFile);
   byte[] file = new byte[(int) aFile.length()];
   stream.read(file);
   request.setRequestProperty("Content-Type", "multipart/form-data; boundary="+boundary); //设置表单类型和分隔符
   request.setRequestProperty("Content-Length", String.valueOf(content.getBytes().length + status.getBytes().length + pic.getBytes().length + aFile.length() + end_data.length)); //设置内容长度
   httpOAuthConsumer.setAdditionalParameters(para);
   httpOAuthConsumer.sign(request);
   OutputStream ot = request.getOutputStream();
   ot.write(content.getBytes());
   ot.write(status.getBytes());
   ot.write(pic.getBytes());
   ot.write(file);
   ot.write(end_data);
   ot.flush();
   ot.close();
   request.connect();
   if (200 == request.getResponseCode()) {
    result = "SUCCESS";
   }
  } catch (FileNotFoundException e1) {
   e1.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } catch (OAuthMessageSignerException e) {
   e.printStackTrace();
  } catch (OAuthExpectationFailedException e) {
   e.printStackTrace();
  } catch (OAuthCommunicationException e) {
   e.printStackTrace();
  }
  return result;
}