Multipart/form-data方式でtextやファイルをアップロードし、マイクロブログの写真のように

/**

*actionUrl--- 

*params---text 

*files---- 

*username--- 

*passwd--- 

*/

public static String postFile(String actionUrl, Map<String, String> params, Map<String, File> files,
			String username,String passwd) throws IOException
    {
//		String root = Environment.getExternalStorageDirectory().toString();
//		File file1 = new File(root+"/test.txt");
//		file1.createNewFile();
//		FileOutputStream fos = new FileOutputStream(file1,true);
        String BOUNDARY = "---------------------------" + System.currentTimeMillis();// 
        String PREFIX = "--"; // 
    	String LINEND = "\r
";	// 
        String MULTIPART_FROM_DATA = "multipart/form-data";// 
        String CHARSET = "UTF-8";// 

        URL uri = new URL(actionUrl);
        HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
        conn.setReadTimeout(5 * 1000); //  
        conn.setDoInput(true);//  
        conn.setDoOutput(true);//  
        conn.setUseCaches(false); //  
        // 
        conn.setRequestProperty("Authorization", "Basic " + Base64.encodeBytes((username + ":" + passwd).getBytes()));// 
        conn.setRequestMethod("POST");
        conn.setRequestProperty("connection", "keep-alive");
        conn.setRequestProperty("Charsert", "UTF-8");
        conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

        //  
        StringBuilder sb = new StringBuilder();
        for (Map.Entry<String, String> entry : params.entrySet())
        {
            sb.append(PREFIX);
            sb.append(BOUNDARY);
            sb.append(LINEND);
            sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
            sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
            sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
            sb.append(LINEND);
            sb.append(entry.getValue());
            sb.append(LINEND);
        }

        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
        outStream.write(sb.toString().getBytes());
//        fos.write(sb.toString().getBytes());
        InputStream in = null;
        //  
        if (files != null)
        {
            for (Map.Entry<String, File> file : files.entrySet())
            {
                StringBuilder sb1 = new StringBuilder();
                sb1.append(PREFIX);
                sb1.append(BOUNDARY);
                sb1.append(LINEND);
                // name post  filename 
                sb1.append("Content-Disposition: form-data; name=\""+file.getKey()+"\"; filename=\"" + file.getValue() + "\"" + LINEND);
                sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
                sb1.append(LINEND);
                outStream.write(sb1.toString().getBytes());
//                fos.write(sb1.toString().getBytes());
                InputStream is = new FileInputStream(file.getValue());
                
//                byte[] buffer = new byte[1024];
//                int len = 0;
//                while ((len = is.read(buffer)) != -1)
//                {
//                    outStream.write(buffer, 0, len);
////                    fos.write(buffer, 0, len);
//                }
                int bytesAvailable;
                while ((bytesAvailable = is.available()) > 0) {
                    int bufferSize = Math.min(bytesAvailable, 4096);
                    byte[] buffer = new byte[bufferSize];
                    int bytesRead = is.read(buffer, 0, bufferSize);
                    outStream.write(buffer, 0, bytesRead);
                }
                
                is.close();
                outStream.write(LINEND.getBytes());
//                fos.write(LINEND.getBytes());
            }

            //  
            
        }
        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
        outStream.write(end_data);
//        fos.write(end_data);
        outStream.flush();
//        fos.flush();
//        fos.close();
        outStream.close();
        //  
        StringBuilder sb2 = null;
        int res = conn.getResponseCode();
        if (res == 200)
        {
            in = conn.getInputStream();
            int ch;
            sb2 = new StringBuilder();
            while ((ch = in.read()) != -1)
            {
                sb2.append((char) ch);
            }
//            Util.print("sb222-->"+sb2);
        } else{
        	return "error";
        }
//        outStream.close();
        conn.disconnect();
        return sb2.toString();
    }