http传送图片（post请求方式）

package com.intsig.demo;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class IdReognizeRestAPIDemo{

	public static void main(String[] args) {
		final String ImageSrcFile = "D:/java/1.JPG";//Recog image path
		final String ResultFile = "D:/test.txt";//Result file path
		IdRecognize(ImageSrcFile, ResultFile);
	}
	private static void IdRecognize(String imageSrc, String resultFile){
		try {
			String filepath = imageSrc;
			System.out.println(filepath);
			File file = new File(filepath);
			
			String urlString = "http://imgs-sandbox.intsig.net/icr/recognize_document?user=*****&password=******&languages=ru";
			URL url = new URL(urlString);
			HttpURLConnection con = (HttpURLConnection) url.openConnection();
			con.setDoOutput(true);
			con.setDoInput(true);
			con.setRequestMethod("POST");
			OutputStream out = con.getOutputStream();
			FileInputStream inputStream = new FileInputStream(file);
			byte[] data = new byte[2048];
			int len = 0;
			int sum = 0;
			while ((len = inputStream.read(data))!= -1) {
				out.write(data, 0, len);
				sum = len + sum;
			}
			System.out.println("upload size="+sum);
			out.flush();
			inputStream.close();
			out.close();
			
			int code = con.getResponseCode();
			System.out.println("code="+code+ " url="+url);
			if (code==200) {
				InputStream inputStream2 = con.getInputStream();
				ByteArrayOutputStream bos = new ByteArrayOutputStream();
				while ((len = inputStream2.read(data))!= -1) {
					bos.write(data, 0, len);					
				}
				inputStream2.close();
				String content = bos.toString();
				bos.close();
				System.out.println("result ="+content);	
				FileOutputStream fos = new FileOutputStream(resultFile);
				fos.write(content.getBytes());
				fos.close();
				System.out.println("save result to "+resultFile);
			}
			con.disconnect();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}