Android使用httpPost向服务器发送请求的方法

import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.conn.ConnectTimeoutException;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.params.CoreConnectionPNames;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;import android.util.Log;public class RequestByHttpPost {  public static String TIME_OUT = "操作超时";  public static String doPost(List<NameValuePair> params,String url) throws Exception{    String result = null;     // 新建HttpPost对象     HttpPost httpPost = new HttpPost(url);     // 设置字符集     HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);     // 设置参数实体     httpPost.setEntity(entity);     // 获取HttpClient对象     HttpClient httpClient = new DefaultHttpClient();     //连接超时     httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 30000);     //请求超时     httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 30000);     try {       // 获取HttpResponse实例      HttpResponse httpResp = httpClient.execute(httpPost);      // 判断是够请求成功      if (httpResp.getStatusLine().getStatusCode() == 200) {        // 获取返回的数据        result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");        Log.i("HttpPost", "HttpPost方式请求成功，返回数据如下：");        Log.i("result", result);      } else {        Log.i("HttpPost", "HttpPost方式请求失败");      }     } catch (ConnectTimeoutException e){       result = TIME_OUT;     }     return result;  }}