/**

	 * 採用get请求的方式

	 *

	 * @param username

	 * @param password

	 * @return null表示求得的路径有问题,text返回请求得到的数据

	 */

	public static String getRequest(String username, String password) {

		try {

			String path = "http://172.22.64.156:8080/0001AndroidWebService/LoginServlet?username="

					+ URLEncoder.encode(username)

					+ "&password="

					+ URLEncoder.encode(password);

			URL url = new URL(path);

			HttpURLConnection conn = (HttpURLConnection) url.openConnection();

			conn.setReadTimeout(500);

			conn.setRequestMethod("GET");

			int code = conn.getResponseCode();

			if (code == 200) {

				// 请求成功

				InputStream is = conn.getInputStream();

				String text = StreamUtil.readStream(is);

				return text;

			} else {

				// 请求失败

				return null;

			}

		} catch (Exception e) {

			e.printStackTrace();

		}

		return null;

	}