package com.xxx.common.util;

 import java.io.IOException;

 import java.net.URI;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

 import org.apache.http.NameValuePair;

 import org.apache.http.client.entity.UrlEncodedFormEntity;

 import org.apache.http.client.methods.CloseableHttpResponse;

 import org.apache.http.client.methods.HttpGet;

 import org.apache.http.client.methods.HttpPost;

 import org.apache.http.client.utils.URIBuilder;

 import org.apache.http.entity.ContentType;

 import org.apache.http.entity.StringEntity;

 import org.apache.http.impl.client.CloseableHttpClient;

 import org.apache.http.impl.client.HttpClients;

 import org.apache.http.message.BasicNameValuePair;

 import org.apache.http.util.EntityUtils;

 public class HttpClientUtil {

     public static String doGet(String url, Map<String, String> param) {

         // 创建Httpclient对象

         CloseableHttpClient httpclient = HttpClients.createDefault();

         String resultString = "";

         CloseableHttpResponse response = null;

         try {

             // 创建uri

             URIBuilder builder = new URIBuilder(url);

             if (param != null) {

                 for (String key : param.keySet()) {

                     builder.addParameter(key, param.get(key));

                 }

             }

             URI uri = builder.build();

             // 创建http GET请求

             HttpGet httpGet = new HttpGet(uri);

             // 执行请求

             response = httpclient.execute(httpGet);

             // 判断返回状态是否为200

             if (response.getStatusLine().getStatusCode() == 200) {

                 resultString = EntityUtils.toString(response.getEntity(), "UTF-8");

             }

         } catch (Exception e) {

             e.printStackTrace();

         } finally {

             try {

                 if (response != null) {

                     response.close();

                 }

                 httpclient.close();

             } catch (IOException e) {

                 e.printStackTrace();

             }

         }

         return resultString;

     }

     public static String doGet(String url) {

         return doGet(url, null);

     }

     public static String doPost(String url, Map<String, String> param) {

         // 创建Httpclient对象

         CloseableHttpClient httpClient = HttpClients.createDefault();

         CloseableHttpResponse response = null;

         String resultString = "";

         try {

             // 创建Http Post请求

             HttpPost httpPost = new HttpPost(url);

             // 创建参数列表

             if (param != null) {

                 List<NameValuePair> paramList = new ArrayList<>();

                 for (String key : param.keySet()) {

                     paramList.add(new BasicNameValuePair(key, param.get(key)));

                 }

                 // 模拟表单

                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8");

                 httpPost.setEntity(entity);

             }

             // 执行http请求

             response = httpClient.execute(httpPost);

             resultString = EntityUtils.toString(response.getEntity(), "utf-8");

         } catch (Exception e) {

             e.printStackTrace();

         } finally {

             try {

                 response.close();

             } catch (IOException e) {

                 e.printStackTrace();

             }

         }

         return resultString;

     }

     public static String doPost(String url) {

         return doPost(url, null);

     }

     /**

      * 请求的参数类型为json

      * @param url

      * @param json

      * @return

      * {username:"",pass:""}

      */

     public static String doPostJson(String url, String json) {

         // 创建Httpclient对象

         CloseableHttpClient httpClient = HttpClients.createDefault();

         CloseableHttpResponse response = null;

         String resultString = "";

         try {

             // 创建Http Post请求

             HttpPost httpPost = new HttpPost(url);

             // 创建请求内容

             StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);

             httpPost.setEntity(entity);

             // 执行http请求

             response = httpClient.execute(httpPost);

             resultString = EntityUtils.toString(response.getEntity(), "utf-8");

         } catch (Exception e) {

             e.printStackTrace();

         } finally {

             try {

                 response.close();

             } catch (IOException e) {

                 e.printStackTrace();

             }

         }

         return resultString;

     }

 }