// 代码网上抄的 忘记链接了 抱歉哈
package upload;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class uploadtest {

    public uploadtest() {

        // TODO Auto-generated constructor stub

    }

     public static void main(String[] args)

     {

         try {

            upLoadByCommonPost("http://127.0.0.1/upload_file.php");

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

     }

    private static void upLoadByCommonPost(String uploadUrl) throws IOException {

        String end = "\r\n";

        String twoHyphens = "--";

        String boundary = "******";

        URL url = new URL(uploadUrl);

        HttpURLConnection httpURLConnection = (HttpURLConnection) url

                .openConnection();

        httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K  应该按照文件大小来定义

        // 允许输入输出流

        httpURLConnection.setDoInput(true);

        httpURLConnection.setDoOutput(true);

        httpURLConnection.setUseCaches(false);

        // 使用POST方法

        httpURLConnection.setRequestMethod("POST");

        httpURLConnection.setRequestProperty("Connection", "Keep-Alive");

        httpURLConnection.setRequestProperty("Charset", "UTF-8");

        httpURLConnection.setRequestProperty("Content-Type",

                "multipart/form-data;boundary=" + boundary);  

        DataOutputStream dos = new DataOutputStream(

                httpURLConnection.getOutputStream());

        dos.writeBytes(twoHyphens + boundary + end);

        dos.writeBytes("Content-Disposition: form-data; name=\"uploadfile\"; filename=\"1.jpg\";" + end);

        dos.writeBytes("Content-Type: image/jpeg" + end);

        dos.writeBytes(end);  

        FileInputStream fis = new FileInputStream("d:\\1.jpg");

        byte[] buffer = new byte[1024*100]; // 100k

        int count = 0;

        // 读取文件

        while ((count = fis.read(buffer)) != -1) {

            dos.write(buffer, 0, count);

        }

        fis.close();

        dos.writeBytes(end);

        dos.writeBytes(twoHyphens + boundary + twoHyphens + end);

        dos.flush();

        InputStream is = httpURLConnection.getInputStream();

        InputStreamReader isr = new InputStreamReader(is, "utf-8");

        BufferedReader br = new BufferedReader(isr);

        String result;

        while ((result=br.readLine()) != null){

            System.out.println(result);

        }

        dos.close();

        is.close();

    }

}