/**

	 * 採用httpclientPost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 httpclientPost(String username, String password) {

		try {

			// 1.打开一个浏览器

			HttpClient client = new DefaultHttpClient();

			// 2.输入地址

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

			HttpPost post = new HttpPost();

			// 指定提交的数据实体

			List<NameValuePair> parameters = new ArrayList<NameValuePair>();

			parameters.add(new BasicNameValuePair("username", username));

			parameters.add(new BasicNameValuePair("password", password));

			post.setEntity(new UrlEncodedFormEntity(parameters, "UTF-8"));

			// 3,敲回车

			HttpResponse response = client.execute(post);

			// 获取返回的码

			int code = response.getStatusLine().getStatusCode();

			if (code == 200) {

				// 获取返回的信息

				InputStream is = response.getEntity().getContent();

				String text = StreamUtil.readStream(is);

				return text;

			} else {

				return null;

			}

		} catch (Exception e) {

			e.printStackTrace();

			return null;

		}

	}