在android中模拟表单上传数据?报错

    本人最近在安卓端开发与后台链接的代码，但是我发现在安卓中没有提供上传表单的方式。于是我上网了解了一下，了解到可以应用一种向后台写入的特殊格式可以达到上传表单的效果。可惜的是调试未成功，让人纠结的是程序没有报错。现在贴出代码，希望大家帮一下忙。

这是网页的代码：

<form action="/home/add" method="post" enctype="multipart/form-data">
						<table>
							<tr>
								<td>标题:</td>
								<td>
								<input type="text" name="title"/>
								</td>
							</tr>
							<tr>
								<td>body:</td>
								<td>								<textarea style="height: 150px;width:300px;resize: none" name="body" ></textarea></td>
							</tr>
							<tr>
								<td>文件</td>
								<td>
								<input type="file" name="img"/>
								</td>
							</tr>
							<tr>
								<td></td>
								<td>
								<input type="submit" class="btn btn-primary" value="提交"/>
								</td>
							</tr>
						</table>
					</form>                            

这是android里面的代码：

final String BOUNDARY="===================";
		final String HYPHENS="--";
		final String CRLF="\r\n";
		
		URL url=new URL(UPLOAD_ONE_RES);
		HttpURLConnection connect=(HttpURLConnection)url.openConnection();
		connect.setRequestMethod("POST");
		connect.setDoOutput(true);
		connect.setDoInput(true);
		connect.setUseCaches(false);
		
		connect.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
		DataOutputStream dataOut=new DataOutputStream(connect.getOutputStream());
		dataOut.writeBytes(HYPHENS+BOUNDARY+CRLF);
		//写图片
		String strContentDisposition="Content-Disposition: form-data; name=\"img\"; filename=\""+imgName+".jpg"+"\"";
		String strContentType="Content-Type: image/jpeg";
		
		dataOut.writeBytes(strContentDisposition+CRLF);
		dataOut.writeBytes(strContentType+CRLF);
		dataOut.writeBytes(CRLF);
		
		FileInputStream fileInput=new FileInputStream(imgFile);
		byte[] data=new byte[fileInput.available()];
		fileInput.read(data);
		dataOut.write(data);
		dataOut.writeBytes(CRLF);
		dataOut.writeBytes(HYPHENS+BOUNDARY+CRLF);
		fileInput.close();
		//title
		String strContentDisposition_title="Content-Disposition: form-data; name=\"title\"";
		String strContentType_title="Content-Type: text";
		dataOut.writeBytes(strContentDisposition_title+CRLF);
		dataOut.writeBytes(strContentType_title+CRLF);
		dataOut.writeBytes(CRLF);
		
		dataOut.writeBytes(title);
		dataOut.writeBytes(CRLF);
		dataOut.writeBytes(HYPHENS+BOUNDARY+CRLF);
		//body
		String strContentDisposition_body="Content-Disposition: form-data; name=\"body\"";
		String strContentType_body="Content-Type: text";
		dataOut.writeBytes(strContentDisposition_body+CRLF);
		dataOut.writeBytes(strContentType_body+CRLF);
		dataOut.writeBytes(CRLF);
		
		dataOut.writeBytes(content);
		dataOut.writeBytes(CRLF);
		dataOut.writeBytes(HYPHENS+BOUNDARY+CRLF);
		//读写结束
		dataOut.flush();
		dataOut.close();