网络请求get/post工具类：NetUtil

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package com.net.util;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.List;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.util.Log;import android.widget.Toast;public class NetUtil {private static final String TAG = "NetUtil";/** * 网络连接是否可用 */public static boolean isConnnected(Context context) {ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);if (null != connectivityManager) {NetworkInfo networkInfo[] = connectivityManager.getAllNetworkInfo();if (null != networkInfo) {for (NetworkInfo info : networkInfo) {if (info.getState() == NetworkInfo.State.CONNECTED) {Log.e(TAG, "the net is ok");return true;}}}}Toast.makeText(context, "网络连接失败", Toast.LENGTH_SHORT).show();return false;}/** * 网络可用状态下，通过get方式向server端发送请求，并返回响应数据 *  * @param strUrl 请求网址 * @param context 上下文 * @return 响应数据 */public static JSONObject getResponseForGet(String strUrl, Context context) {if (isConnnected(context)) {return getResponseForGet(strUrl);}return null;}/** * 通过Get方式处理请求，并返回相应数据 *  * @param strUrl 请求网址 * @return 响应的JSON数据 */public static JSONObject getResponseForGet(String strUrl) {HttpGet httpRequest = new HttpGet(strUrl);return getRespose(httpRequest);}/** * 网络可用状态下，通过post方式向server端发送请求，并返回响应数据 *  * @param market_uri 请求网址 * @param nameValuePairs 参数信息 * @param context 上下文 * @return 响应数据 */public static JSONObject getResponseForPost(String market_uri, List<NameValuePair> nameValuePairs, Context context) {if (isConnnected(context)) {return getResponseForPost(market_uri, nameValuePairs);}return null;}/** * 通过post方式向服务器发送请求，并返回响应数据 *  * @param strUrl 请求网址 * @param nameValuePairs 参数信息 * @return 响应数据 */public static JSONObject getResponseForPost(String market_uri, List<NameValuePair> nameValuePairs) {if (null == market_uri || "" == market_uri) {return null;}HttpPost request = new HttpPost(market_uri);try {request.setEntity(new UrlEncodedFormEntity(nameValuePairs));return getRespose(request);} catch (UnsupportedEncodingException e1) {e1.printStackTrace();}return null;}/** * 响应客户端请求 *  * @param request 客户端请求get/post * @return 响应数据 */public static JSONObject getRespose(HttpUriRequest request) {try {HttpResponse httpResponse = new DefaultHttpClient().execute(request);int statusCode = httpResponse.getStatusLine().getStatusCode();if (HttpStatus.SC_OK == statusCode) {String result = EntityUtils.toString(httpResponse.getEntity());Log.i(TAG, "results=" + result);return new JSONObject(result);}} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (JSONException e) {e.printStackTrace();}return null;}}