学步园

servlet，接收以POST方式提交来的数据。

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		InputStream inputStream = request.getInputStream();
		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
		String result = "";
		try {
			byte[] data = new byte[1024];
			int len = 0;
			result = "";
			if (inputStream != null) {
				while ((len = inputStream.read(data)) != -1) {
					byteArrayOutputStream.write(data, 0, len);
				}
				result = new String(byteArrayOutputStream.toByteArray());
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			byteArrayOutputStream.close();
			inputStream.close();
		}
		System.out.println(result);
	}

post请求时，组织JSON数据并调用servlet传输数据

	public static void buildJson() throws Exception {
		// 图片转换成 BYTE数组
		byte[] data = null;
		FileImageInputStream input = new FileImageInputStream(new File(
				"d://7.jpg"));
		ByteArrayOutputStream output = new ByteArrayOutputStream();
		byte[] buf = new byte[1024];
		int numBytesRead = 0;
		while ((numBytesRead = input.read(buf)) != -1) {
			output.write(buf, 0, numBytesRead);
		}
		data = output.toByteArray();
		output.close();
		input.close();

		JSONObject jo = new JSONObject();
		jo.put("agentId", "001");
		jo.put("picType", "1");
		jo.put("picName", "素材名称");
		jo.put("picByte", data);

		System.out.println(jo.toString());

		URL url = new URL(
				"http://127.0.0.1:8080/AdThirdSystem/UploadServlet");
		HttpURLConnection httpURLConnection = (HttpURLConnection) url
				.openConnection();
        httpURLConnection.setConnectTimeout(3000);  
        httpURLConnection.setDoInput(true);// 从服务器获取数据  
        httpURLConnection.setDoOutput(true);// 向服务器写入数据 
		OutputStream outputStream = (OutputStream) httpURLConnection  
                .getOutputStream();  
		outputStream.write(jo.toString().getBytes()); 

		// byte数组 转换成 图片
//		FileImageOutputStream imageOutput = new FileImageOutputStream(new File(
//				"e://1.jpg"));
//		imageOutput.write(data, 0, data.length);
//		imageOutput.close();
	}