android关于登录问题

[大海啊它都是水]

我参照android应用开发详解中的方法建了一个HttpUtil专门用来处理连接
可是连接不上 有个HttpUtil.queryStringForPost(url）老是执行报错
我试过了 有句HttpUtil.getHttpResponse(request)执行不了 不知道是怎么回事啊？
求高手来解决哈 呵呵
附上httputil代码

package com.hubu.Util;

import java.io.IOException;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class HttpUtil {

	public static final String BASE_URL = "http://122.204.216.38:8080/People_Servers/";

	public static HttpGet getHttpGet(String url) {
		HttpGet request = new HttpGet(url);
		return request;
	}

	public static HttpPost getHttpPost(String url) {
		HttpPost request = new HttpPost(url);
		return request;
	}

	public static HttpResponse getHttpResponse(HttpGet request)
			throws ClientProtocolException, IOException {
		HttpResponse response = new DefaultHttpClient().execute(request);
		return response;
	}

	public static HttpResponse getHttpResponse(HttpPost request)
			throws ClientProtocolException, IOException {
		HttpResponse response = new DefaultHttpClient().execute(request);
		return response;
	}

	// 通过URL发送post请求 并返回请求结果
	public static String queryStringForPost(String url) {
		HttpPost request = HttpUtil.getHttpPost(url);
		String result = null;
		try {

			System.out.println("dahaia doushi  shui");
			System.out.println(HttpUtil.getHttpResponse(request));
			System.out.println("dahaia doushi  shui"
					+ HttpUtil.getHttpResponse(request));

			HttpResponse response = HttpUtil.getHttpResponse(request);
			if (response.getStatusLine().getStatusCode() == 200) {
				result = EntityUtils.toString(response.getEntity());
				return result;
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		} catch (IOException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		}
		return null;
	}

	public static String queryStringForPost(HttpPost request) {
		String result = null;
		try {
			HttpResponse response = HttpUtil.getHttpResponse(request);

			if (response.getStatusLine().getStatusCode() == 200) {
				result = EntityUtils.toString(response.getEntity());
				return result;
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		} catch (IOException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		}
		return null;
	}

	public static String queryStringForGet(String url) {
		HttpGet request = HttpUtil.getHttpGet(url);
		String result = null;
		try {
			HttpResponse response = HttpUtil.getHttpResponse(request);
			if (response.getStatusLine().getStatusCode() == 200) {
				result = EntityUtils.toString(response.getEntity());
				return result;
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		} catch (IOException e) {
			e.printStackTrace();
			result = "网络异常！";
			return result;
		}
		return null;
	}
}

还有一个是LoginActivity

private boolean login(){
		String username = userEditText.getText().toString();
		String pwd = pwdEditText.getText().toString();
		String result=query(username,pwd);
		if(result!=null&&result.equals("1")){
			return true;
		}else{
			return false;
		}
	}

private String query(String username,String password){
		String queryString = "username="+username+"&password="+password;
		String url = HttpUtil.BASE_URL+"servlet/LoginServlet?"+queryString;
		return HttpUtil.queryStringForPost(url);
    }

servlet 的doget方法

protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		LoginDAO dao = new LoginDAOimpl();
		// 获得客户端请求参数
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		System.out.println(username + "    " + password);

		User u = dao.login(username, password);
		System.out.println(u);
		if (u != null) {
			// 响应客户端内容，登录成功
			out.print("1");
		} else {
			// 响应客户端内容，登录失败
			out.print("0");
		}
		out.flush();
		out.close();
	}

另外 有的时候能在页面打印出 1 有的时候又是 0 超级郁闷 呵呵

[leo9032]

大哥，你这不是那个点餐系统的源码吗，肯定能登录，是你配置出问题了，你不要再把这个代码贴出来了，把错误贴出来，人家代码肯定没有错！

[zyq1739511871]

出现同样的问题。有没有人教我下怎么弄啊