HttpClient工具，使用Apache的HttpClient类实现get和p代码,Java代码库,德仔网

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【Java】 HttpClient工具，使用Apache的HttpClient类实现get和p
作者: / 发布于2017/9/27/ 675
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 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.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.protocol.HTTP;
 import org.apache.http.util.EntityUtils;
 
 public class HttpUtil {
     
     public static String httpGet(String url) {
         String response = null;
         try {
             HttpClient httpClient = new DefaultHttpClient();
             HttpGet httpGet = new HttpGet(url);
             HttpResponse httpResponse = httpClient.execute(httpGet);
             if (null != httpResponse) {
                 int status = httpResponse.getStatusLine().getStatusCode();
                 if (HTTP_OK == status) {
                     HttpEntity httpEntity = httpResponse.getEntity();
                     response = EntityUtils.toString(httpEntity, HTTP.UTF_8);
                 } else {
                     response = ("错误码:" + status);
                 }
             }
         } catch (ClientProtocolException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
         
         return response;
     }
     
     public static String httpPost(String url, List<HttpPostParam> params) {
         String response = null;
         try {
             HttpClient httpClient = new DefaultHttpClient();
             HttpPost httpPost = new HttpPost(url);
             
             if (null != params) {
                 if (params.size() > 0) {
                     List<NameValuePair> pairsList = new ArrayList<NameValuePair>();
                     for (int i = 0; i < params.size(); i++) {
                         HttpPostParam param = params.get(i);
                         NameValuePair pair = new BasicNameValuePair(param.getKey(), param.getValue());
                         pairsList.add(pair);
                     }
                     httpPost.setEntity(new UrlEncodedFormEntity(pairsList, HTTP.UTF_8));
                 }
             }
             
             HttpResponse httpResponse = httpClient.execute(httpPost);
             if (null != httpResponse) {
                 int status = httpResponse.getStatusLine().getStatusCode();
                 if (HTTP_OK == status) {
                     HttpEntity httpEntity = httpResponse.getEntity();
                     response = EntityUtils.toString(httpEntity, HTTP.UTF_8);
                 } else {
                     response = ("错误码:" + status);
                 }
             }
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
         }catch (ClientProtocolException e) {
             e.printStackTrace();
         } catch (ParseException e) {
             e.printStackTrace();
         }catch (IOException e) {
             e.printStackTrace();
         }
         
         return response;
     }
     
     private final static int HTTP_OK = 200;
 }
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