一.https忽略证书

/** * 用于进行Https请求的HttpClient *  * @author joey * */public class SSLClient {    public static CloseableHttpClient createSSLClientDefault(){        try {            SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {                //信任所有                public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {                    return true;                }            }).build();            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);            return HttpClients.custom().setSSLSocketFactory(sslsf).build();        } catch (KeyManagementException e) {            e.printStackTrace();        } catch (NoSuchAlgorithmException e) {            e.printStackTrace();        } catch (KeyStoreException e) {            e.printStackTrace();        }        return  HttpClients.createDefault();    }}

二.post与get请求

/** * 利用HttpClient的工具类 *  * @author Joey * */public class HttpClientUtil {        private static String charSet = "UTF-8";    private static CloseableHttpClient httpClient = null;    private static CloseableHttpResponse response = null;        /**     * https的post请求     * @param url     * @param jsonstr     * @param charset     * @return     */    public static String doHttpsPost(String url, String jsonStr) {        try {            httpClient = SSLClient.createSSLClientDefault();            HttpPost httpPost = new HttpPost(url);            httpPost.setHeader("Content-Type", "application/json");                        StringEntity se = new StringEntity(jsonStr);            se.setContentType("text/json");            se.setContentEncoding(new BasicHeader("Content-Type", "application/json"));            httpPost.setEntity(se);                        response = httpClient.execute(httpPost);            if (response != null) {                HttpEntity resEntity = response.getEntity();                if (resEntity != null) {                    return EntityUtils.toString(resEntity, charSet);                }            }        } catch (Exception ex) {            ex.printStackTrace();        }finally {             if(httpClient != null){                    try {                        httpClient.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                }                if(response != null){                    try {                        response.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                }        }        return null;    }        /**     * http的post请求(用于key-value格式的参数)      * @param url     * @param param     * @return     */    public static String doHttpPost(String url,Map
      
        param){        try {            //请求发起客户端            httpClient = HttpClients.createDefault();            //参数集合            List
       
         postParams = new ArrayList
        
         ();            //遍历参数并添加到集合            for(Map.Entry
         
           entry:param.entrySet()){                postParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));            }                        //通过post方式访问            HttpPost post = new HttpPost(url);            HttpEntity paramEntity = new UrlEncodedFormEntity(postParams,charSet);            post.setEntity(paramEntity);            response = httpClient.execute(post);            StatusLine status = response.getStatusLine();              int state = status.getStatusCode();              if (state == HttpStatus.SC_OK) {                  HttpEntity valueEntity = response.getEntity();                String content = EntityUtils.toString(valueEntity);                //jsonObject = JSONObject.fromObject(content);                return content;            }        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (ClientProtocolException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally{            if(httpClient != null){                try {                    httpClient.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(response != null){                try {                    response.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return null;    }         /**      * http的post请求（用于请求json格式的参数）      * @param url      * @param params      * @return      */      public static String doHttpPost(String url, String jsonStr) {          try {            httpClient = HttpClients.createDefault();                      // 创建httpPost            HttpPost httpPost = new HttpPost(url);                 httpPost.setHeader("Accept", "application/json");                             StringEntity entity = new StringEntity(jsonStr, charSet);              entity.setContentType("text/json");            entity.setContentEncoding(new BasicHeader("Content-Type", "application/json"));            httpPost.setEntity(entity);                      //发送post请求            response = httpClient.execute(httpPost);              if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {                  HttpEntity responseEntity = response.getEntity();                  String jsonString = EntityUtils.toString(responseEntity);                  return jsonString;              }        }catch(Exception e) {              e.printStackTrace();        }finally {            if(httpClient != null){                try {                    httpClient.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(response != null){                try {                    response.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }          return null;      }          /**     * http的Get请求     * @param url     * @param param     * @return     */    public static String doHttpGet(String url,Map
          
            param) {        CloseableHttpClient httpclient = null;        CloseableHttpResponse response = null;                try {            httpclient = HttpClients.createDefault();            if(param != null && !param.isEmpty()) {                //参数集合                List
           
             getParams = new ArrayList
            
             (); for(Map.Entry
             
               entry:param.entrySet()){ getParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } url +="?"+EntityUtils.toString(new UrlEncodedFormEntity(getParams), "UTF-8"); } //发送gey请求 HttpGet httpGet = new HttpGet(url); response = httpclient.execute(httpGet); if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { return EntityUtils.toString(response.getEntity()); } }catch(Exception e) { e.printStackTrace(); }finally{ if(httpclient != null){ try { httpclient.close(); } catch (IOException e) { e.printStackTrace(); } } if(response != null){ try { response.close(); } catch (IOException e) { e.printStackTrace(); } } } return null; } }