直接上程式碼

/**

    }

專案改進

    public static HttpURLConnection getCon(String url) {
	try {
	    URL uri = new URL(url);
	    HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
	    conn.setConnectTimeout(CONNECTTIMEOUT);
	    conn.setReadTimeout(READTIMEOUT);
	    conn.setDoOutput(true);
	    conn.setDoInput(true);
	    conn.setUseCaches(false);
	    conn.setRequestMethod("POST");
	    conn.setRequestProperty("Connection", "Keep-Alive");
	    conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
	    conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=---------------------------");
	    return conn;
	} catch (MalformedURLException e) {
	    System.out.println("請求超時");
	    BaseAction.LOGGER.error(e);
	} catch (IOException e) {
	 
	}
	return null;

    }

 public static String sendPost(String url, File file, Map<String, Object> params, String filename1) {
	String res = "";
	ByteArrayOutputStream ret = null;

	// boundary就是request頭和上傳檔案內容的分隔符
	String boundary = "---------------------------";
	DataInputStream in = null;
	BufferedReader reader = null;
	FileInputStream fileInputStream = null;
	try {
	    String rn = "\r\n";
	    HttpURLConnection conn = getCon(url);
	    OutputStream out = new DataOutputStream(conn.getOutputStream());
	    // text
	    if (params != null) {
		StringBuilder strBuf = new StringBuilder();
		Iterator<Map.Entry<String, Object>> iter = params.entrySet().iterator();
		while (iter.hasNext()) {
		    Map.Entry<String, Object> entry = iter.next();
		    String inputName = entry.getKey();
		    Object inputValue = entry.getValue();
		    if (null == inputValue) {
			continue;
		    }
		    strBuf.append(rn).append("--").append(boundary).append(rn);
		    strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"" + rn + rn);
		    strBuf.append(inputValue);
		}
		out.write(strBuf.toString().getBytes());
	    }
	    // file
	    if (file != null) {
		StringBuilder strBuf = new StringBuilder();
		strBuf.append(rn).append("--").append(boundary).append(rn);
		strBuf.append("Content-Disposition: form-data; name=\"pic\"; filename=\"" + filename1 + "\"" + rn);
		strBuf.append("Content-Type:application/octet-stream " + rn + rn);
		out.write(strBuf.toString().getBytes());
		fileInputStream = new FileInputStream(file);
		in = new DataInputStream(fileInputStream);

		int bytes;

		byte[] bufferOut = new byte[MAX];
		while ((bytes = in.read(bufferOut)) != -1) {
		    out.write(bufferOut, 0, bytes);
		}
		in.close();
		fileInputStream.close();
	    }

	    byte[] endData = ("\r\n--" + boundary + "--\r\n").getBytes();
	    out.write(endData);
	    out.flush();
	    out.close();

	    // *******************************************
	    // 讀取返回資料
	    /*
	     * StringBuilder strBuf = new StringBuilder(); reader = new
	     * BufferedReader( new InputStreamReader(conn.getInputStream()));
	     * String line; while ((line = reader.readLine()) != null) {
	     * strBuf.append(line).append("\n"); } res = strBuf.toString();
	     * System.out.println(" 返回：" + res); //System.out.println(" 返回：" +
	     * DESUtil.decrypt(res)); reader.close();
	     */
	    // ****newread*****************************************

	    InputStream input = conn.getInputStream();
	    // 位元組陣列
	    byte[] bcache = new byte[2048];
	    int readSize = 0;// 每次讀取的位元組長度
	    ret = new ByteArrayOutputStream();
	    try {
		// 一次性讀取2048位元組
		while ((readSize = input.read(bcache)) > 0) {
		    ret.write(bcache, 0, readSize);
		}
	    } catch (IOException e1) {
		BaseAction.LOGGER.error(e1);
	    } finally {
		try {
		    // 輸入流關閉
		    input.close();
		} catch (IOException e) {

		}
	    }

	    System.out.println(" 返回：" + ret.toString());
	
	    // *****newreadend
	    // ***************************************************************

	    conn.disconnect();
	} catch (IOException e) {

	} finally {
	    try {
		if (in != null) {
		    in.close();
		}
		if (reader != null) {
		    reader.close();
		}
		if (fileInputStream != null) {
		    fileInputStream.close();
		}
	    } catch (IOException e) {
		BaseAction.LOGGER.error(e);
	    }
	}

	
	return ret.toString();
	
    }