westful httpclient dopost调用接口

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import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;




import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;


import net.sf.json.JSONObject;public class HttpClientUtil {
//
public static final String learnSelUrl="http://192.168.0.124:8080/site/trdcredit/jxlxxwactivereq"; 
 
 /**
  * post请求
  * @param url
  * @param param
  * @return
* @throws IOException 
  */
 public static JSONObject postJsonData(String url,Map<String,String> params){
 CloseableHttpClient httpclient = HttpClientUtil.createDefault();
 HttpPost httpPost = new HttpPost(url);
  //拼接参数
 List<NameValuePair> list = new ArrayList<NameValuePair>();
 for (Map.Entry<String, String> entry : params.entrySet()) {
         String key = entry.getKey().toString();
         String value = entry.getValue().toString();
         System.out.println("key=" + key + " value=" + value);
         NameValuePair pair = new BasicNameValuePair(key, value); 
         list.add(pair); 
 }
 CloseableHttpResponse response=null;
 try {
httpPost.setEntity(new UrlEncodedFormEntity(list));
response = httpclient.execute(httpPost);
 } catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
 } catch (ClientProtocolException e) {
e.printStackTrace();
 } catch (IOException e) {
e.printStackTrace();
 }
 /**请求发送成功，并得到响应**/  
 JSONObject jsonObject=null;
          if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
        HttpEntity httpEntity = response.getEntity();
         String result=null;
try {
result = EntityUtils.toString(httpEntity);
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}// 返回json格式：
         jsonObject = JSONObject.fromObject(result);
       }
          return jsonObject;
 }
 
 /**
   * Creates {@link CloseableHttpClient} instance with default
   * configuration.
   */
   public static CloseableHttpClient createDefault() {
       return HttpClientBuilder.create().build();
   }

}

//方法二

CloseableHttpClient httpClient = HttpClients.createDefault();        HttpPost httpPost = new HttpPost(”调用地址“);                //拼接参数        List<NameValuePair> list = new ArrayList<NameValuePair>();        list.add(new BasicNameValuePair("参数队列头部", 调用参数));        System.out.println("==== 提交参数 ======" +list);        CloseableHttpResponse response  = null;        try {            httpPost.setEntity(new UrlEncodedFormEntity(list));            response = httpClient.execute(httpPost);            System.out.println("========HttpResponseProxy：========"+response.getStatusLine());            HttpEntity entity = response.getEntity();            if(entity != null){                String result = EntityUtils.toString(entity, "UTF-8");                System.out.println("========接口返回=======" +result);            }            EntityUtils.consume(entity);            //httpClient.getConnectionManager().shutdown();        } catch (Exception e) {            e.printStackTrace();        }finally {            if(response != null){                try {                    response.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(httpClient != null){                try {                    httpClient.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }

 //关闭参数流操作

public static void consume(final HttpEntity entity) throws IOException {        if (entity == null) {            return;        }        if (entity.isStreaming()) {            final InputStream instream = entity.getContent();            if (instream != null) {                instream.close();            }        }    }

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