java发送URL请求获取返回值

第一种方法：

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.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.util.EntityUtils;

 public static String sendUrlRequest(String urlStr, String param1,String param2) throws Exception {
       String tempStr = null;
      HttpClient httpclient = new DefaultHttpClient();
    Properties properties = new Properties();
    HttpEntity entity = null;
    String xmlContent = "";
    try
    {

    //设置超时时间
     httpclient.getParams().setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,20000);
     httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 20000);

        //封装需要传递的参数
           List <NameValuePair> nvps = new ArrayList <NameValuePair>();
           nvps.add(new BasicNameValuePair("mainMemoCode", strmainMemoCode));
           nvps.add(new BasicNameValuePair("recordPassWord", strrecordPassWord));
           //客户端的请求方法类型
     HttpPost httpPost = new HttpPost(urlStr);
        httpPost.setEntity(new UrlEncodedFormEntity(nvps, "GBK"));
      HttpResponse response = httpclient.execute(httpPost);

    //获取服务器返回Http的Content-Type的值
      tempStr=response.getHeaders("Content-Type")[0].getValue().toString();

     //获取服务器返回页面的值
            entity = response.getEntity();
          xmlContent = EntityUtils.toString(entity);
            String strmessage=null;
            System.out.println(xmlContent);
         System.out.println(response.getHeaders("Content-Type")[0].getValue().toString());
      httpPost.abort();
      
    }
    catch (SocketTimeoutException e)
    {
    }
    catch(Exception ex)
    {
     ex.printStackTrace();
    }
    finally{
     httpclient.getConnectionManager().shutdown();
    }
    第二种方法：

   public static String sendUrlRequest(String urlStr, String param1,String param2) throws Exception {

             HttpURLConnection url_con =null;
         try {
          URL url = new URL(urlStr); 
          StringBuffer bankXmlBuffer = new StringBuffer(); 
          //创建URL连接，提交到数据，获取返回结果 
          HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
          connection.setRequestMethod("POST"); 
          connection.setDoOutput(true); 
          connection.setRequestProperty("User-Agent", "directclient"); 
          
          PrintWriter out = new PrintWriter(new OutputStreamWriter(connection.getOutputStream(),"GBK")); 
          out.println(param); 
          out.close(); 
          BufferedReader in = new BufferedReader(new InputStreamReader(connection 
                  .getInputStream(),"GBK")); 
           
          String inputLine; 
           
          while ((inputLine = in.readLine()) != null) { 
              bankXmlBuffer.append(inputLine); 
          } 
          in.close();  
          tempStr = bankXmlBuffer.toString();  
               }
         catch(Exception e)
         {
         System.out.println("发送GET请求出现异常！" + e);
         e.printStackTrace();
        
         } finally {
             if (url_con != null)
                 url_con.disconnect();
         }  
         
        return tmpeStr;

}