HTTP请求工具类

Posted 2021-01-13 dingwenhua

/**
 * Copyright (c) 2013-Now http://jeesite.com All rights reserved.
 */
package com.jeesite.common.web.http;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;

import org.apache.http.HttpEntity;
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.methods.HttpUriRequest;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
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.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;

/**
 * HTTP客户端工具类（支持HTTPS）
 * @author Austin Ding
 * @version 2018-3-27
 */
public class HttpClientUtils {
   
   /**
    * http的get请求
    * @param url
    */
   public static String get(String url) {
      return get(url, "UTF-8");
   }
   
   /**
    * http的get请求
    * @param url
    */
   public static String get(String url, String charset) {
      HttpGet httpGet = new HttpGet(url);
      return executeRequest(httpGet, charset);
   }
   
   /**
    * http的get请求，增加异步请求头参数
    * @param url
    */
   public static String ajaxGet(String url) {
      return ajaxGet(url, "UTF-8");
   }
   
   /**
    * http的get请求，增加异步请求头参数
    * @param url
    */
   public static String ajaxGet(String url, String charset) {
      HttpGet httpGet = new HttpGet(url);
      httpGet.setHeader("X-Requested-With", "XMLHttpRequest");
      return executeRequest(httpGet, charset);
   }

   /**
    * http的post请求，传递map格式参数
    */
   public static String post(String url, Map<String, String> dataMap) {
      return post(url, dataMap, "UTF-8");
   }

   /**
    * http的post请求，传递map格式参数
    */
   public static String post(String url, Map<String, String> dataMap, String charset) {
      HttpPost httpPost = new HttpPost(url);
      try {
         if (dataMap != null){
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            for (Map.Entry<String, String> entry : dataMap.entrySet()) {
               nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
            }
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
            formEntity.setContentEncoding(charset);
            httpPost.setEntity(formEntity);
         }
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      }
      return executeRequest(httpPost, charset);
   }

   /**
    * http的post请求，增加异步请求头参数，传递map格式参数
    */
   public static String ajaxPost(String url, Map<String, String> dataMap) {
      return ajaxPost(url, dataMap, "UTF-8");
   }

   /**
    * http的post请求，增加异步请求头参数，传递map格式参数
    */
   public static String ajaxPost(String url, Map<String, String> dataMap, String charset) {
      HttpPost httpPost = new HttpPost(url);
      httpPost.setHeader("X-Requested-With", "XMLHttpRequest");
      try {
         if (dataMap != null){
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            for (Map.Entry<String, String> entry : dataMap.entrySet()) {
               nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
            }
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
            formEntity.setContentEncoding(charset);
            httpPost.setEntity(formEntity);
         }
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      }
      return executeRequest(httpPost, charset);
   }

   /**
    * http的post请求，增加异步请求头参数，传递json格式参数
    */
   public static String ajaxPostJson(String url, String jsonString) {
      return ajaxPostJson(url, jsonString, "UTF-8");
   }

   /**
    * http的post请求，增加异步请求头参数，传递json格式参数
    */
   public static String ajaxPostJson(String url, String jsonString, String charset) {
      HttpPost httpPost = new HttpPost(url);
      httpPost.setHeader("X-Requested-With", "XMLHttpRequest");
//    try {
         StringEntity stringEntity = new StringEntity(jsonString, charset);// 解决中文乱码问题
         stringEntity.setContentEncoding(charset);
         stringEntity.setContentType("application/json");
         httpPost.setEntity(stringEntity);
//    } catch (UnsupportedEncodingException e) {
//       e.printStackTrace();
//    }
      return executeRequest(httpPost, charset);
   }

   /**
    * 执行一个http请求，传递HttpGet或HttpPost参数
    */
   public static String executeRequest(HttpUriRequest httpRequest) {
      return executeRequest(httpRequest, "UTF-8");
   }

   /**
    * 执行一个http请求，传递HttpGet或HttpPost参数
    */
   public static String executeRequest(HttpUriRequest httpRequest, String charset) {
      CloseableHttpClient httpclient;
      if ("https".equals(httpRequest.getURI().getScheme())){
         httpclient = createSSLInsecureClient();
      }else{
         httpclient = HttpClients.createDefault();
      }
      String result = "";
      try {
         try {
            CloseableHttpResponse response = httpclient.execute(httpRequest);
            HttpEntity entity = null;
            try {
               entity = response.getEntity();
               result = EntityUtils.toString(entity, charset);
            } finally {
               EntityUtils.consume(entity);
               response.close();
            }
         } finally {
            httpclient.close();
         }
      }catch(IOException ex){
         ex.printStackTrace();
      }
      return result;
   }
   
   /**
    * 创建 SSL连接
    */
   public static CloseableHttpClient createSSLInsecureClient() {
      try {
         SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(new TrustStrategy() {
            @Override
            public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
               return true;
            }
         }).build();
         SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
               return true;
            }
         });
         return HttpClients.custom().setSSLSocketFactory(sslsf).build();
      } catch (GeneralSecurityException ex) {
         throw new RuntimeException(ex);
      }
   }
   
}