新浪微博采用Oauth发送图片和文字

基于网上很多人利用新浪api开发新浪微博客户端的时候遇到无法发图片的问题，很多人卡在了这一步。

现将代码呈上，希望能帮到一些朋友。

/** 
     * 发表带图片的微博 
     * @param token 
     * @param tokenSecret 
     * @param aFile     要上传的图片文件
     * @param status    要发表的微博文字
     * @param urlPath   对应的api地址
     * @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 
　　　　　　　　　　//下面的步骤是对请求进行签名。  
            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;  
    }