android通过httpPost向服务器发送请求 .

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;
 }
}