Android 透过Http访问Web端的Servlet

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;

public class HttpUtil {
	public static String getHttpJSON(String url) {
		// String httpUrl =
		// "http://www.weixiweb.cn/memberOrder.do?op=memberOrderJson";
		HttpGet httpRequest = new HttpGet(url);
		try {
			HttpClient httpclient = new DefaultHttpClient();
			HttpResponse httpResponse = httpclient.execute(httpRequest);

			if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				String jsonStr = EntityUtils.toString(httpResponse.getEntity(),
						"UTF-8");
				return jsonStr;
			}
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("==============e.printStackTrace() : "
					+ e.getMessage());
		}
		return null;
	}

	public static int getHttpStatus() {
		int status = 0;
		HttpGet httpRequest = new HttpGet(
				"http://192.168.0.214/vote/AndroidConnServlet");
		try {
                        ///生成HttpParams对象，设置网络连接的时间
			HttpParams httpParameters = new BasicHttpParams();
			HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
			HttpConnectionParams.setSoTimeout(httpParameters, 5000);
			HttpConnectionParams.setTcpNoDelay(httpParameters, true);
			
			HttpClient httpclient = new DefaultHttpClient(httpParameters);
//			HttpParams params = httpclient.getParams();
			HttpResponse httpResponse = httpclient.execute(httpRequest);
//			HttpConnectionParams.setConnectionTimeout(params, 3000);
//			HttpConnectionParams.setSoTimeout(params, 5000);

			status = httpResponse.getStatusLine().getStatusCode();
		} catch (Exception e) {
			e.printStackTrace();
			System.out
					.println("==============connection wifi fail,e.printStackTrace() : "
							+ e.getMessage());
		}
		return status;
	}

}

public void ensureVote() {
			String URL = "http://192.168.0.214/vote/VoteServlet";
			codeText = codeEdit.getText().toString();
			if (codeText == null || codeText.length() == 0) {
				Toast.makeText(VoteActivity.this, "投票失败,请输入投票码.",
						Toast.LENGTH_LONG).show();
				return;
			}
			URL = URL + "?project=" + radioVoteText + "&voteCode=" + codeText
					+ "&source=Android";
			
			String httpStatus = "0";
			httpStatus = HttpUtil.getHttpJSON(URL);
			if (httpStatus != null && httpStatus.equals("1")) {
				new AlertDialog.Builder(VoteActivity.this).setTitle("success")
						.setMessage("投票成功,非常感谢.").setNeutralButton("返回",
								new DialogInterface.OnClickListener() {
									public void onClick(DialogInterface dlg,
											int sumthin) {
									}
								}).show();
			} else if (httpStatus != null && httpStatus.equals("2")) {
				new AlertDialog.Builder(VoteActivity.this).setTitle("warn")
						.setMessage("投票失败,投票码已经使用.").setNeutralButton("返回",
								new DialogInterface.OnClickListener() {
									public void onClick(DialogInterface dlg,
											int sumthin) {
									}
								}).show();
			} else if (httpStatus != null && httpStatus.equals("0")) {
				new AlertDialog.Builder(VoteActivity.this).setTitle("error")
						.setMessage("投票失败,请联系网管.").setNeutralButton("返回",
								new DialogInterface.OnClickListener() {
									public void onClick(DialogInterface dlg,
											int sumthin) {
									}
								}).show();
			}

		}
	}