HttpClinet工具类

一、URL调用 忽略https证书

1、调用

InputStream in = null;

        try {
            URL url = new URL( "url地址" );
            IgnoreSSL ignoreSSL = new IgnoreSSL(url);
            in = ignoreSSL.getSteam();
        } catch (Exception e) {
            e.printStackTrace();
        }
        String count = "";
        try {
            byte[] b = new byte[1024];
            int len;
            while ((len = in.read(b))!=-1) {
                count+=new String(b,0,len);
            }
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

2、url忽略https工具类

public class IgnoreSSL {
    private HttpURLConnection connection;
    public ignoreSSL(final URL validationUrl) throws Exception {
        trustAllHttpsCertificates();
        HttpsURLConnection.setDefaultHostnameVerifier(hv);
        connection = (HttpURLConnection) validationUrl.openConnection();
    }
    public InputStream getSteam() throws IOException {
        return connection.getInputStream();
    }
    HostnameVerifier hv = new HostnameVerifier() {
        public boolean verify(String urlHostName, SSLSession session) {
            System.out.println("Warning: URL Host: " + urlHostName + " vs. "
                    + session.getPeerHost());
            return true;
        }
    };

    private static void trustAllHttpsCertificates() throws Exception {
        javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
        javax.net.ssl.TrustManager tm = new miTM();
        trustAllCerts[0] = tm;
        javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext
                .getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc
                .getSocketFactory());
    }

    static class miTM implements javax.net.ssl.TrustManager,
            javax.net.ssl.X509TrustManager {
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        public boolean isServerTrusted(
                java.security.cert.X509Certificate[] certs) {
            return true;
        }

        public boolean isClientTrusted(
                java.security.cert.X509Certificate[] certs) {
            return true;
        }

        public void checkServerTrusted(
                java.security.cert.X509Certificate[] certs, String authType)
                throws java.security.cert.CertificateException {
            return;
        }

        public void checkClientTrusted(
                java.security.cert.X509Certificate[] certs, String authType)
                throws java.security.cert.CertificateException {
            return;
        }
    }

}

二、HttpClinet 工具类

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpStatus;
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.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 {

    private 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, Object> 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, (String) param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
                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 {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static String doPost(String url) {
        return doPost(url, null);
    }

    public static String doPostJson(String url, String json,String token_header) throws Exception {
        // 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
            httpPost.setHeader("HTTP Method","POST");
            httpPost.setHeader("Connection","Keep-Alive");
            httpPost.setHeader("Content-Type","application/json;charset=utf-8");
            httpPost.setHeader("x-authentication-token",token_header);

            StringEntity entity = new StringEntity(json);

            entity.setContentType("application/json;charset=utf-8");
            httpPost.setEntity(entity);

            // 执行http请求
            response = httpClient.execute(httpPost);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            throw e;
        } finally {
            try {
                if(response!=null){
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static String postXML(String url,String xml){
        CloseableHttpClient client = null;
        CloseableHttpResponse resp = null;
        try{
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");
            client = HttpClients.createDefault();
            StringEntity entityParams = new StringEntity(xml,"utf-8");
            httpPost.setEntity(entityParams);
            client = HttpClients.createDefault();
            resp = client.execute(httpPost);
            String resultMsg = EntityUtils.toString(resp.getEntity(),"utf-8");
            return resultMsg;
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try {
                if(client!=null){
                    client.close();
                }
                if(resp != null){
                    resp.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}

解析xml

import com.alibaba.fastjson.JSON;
import org.dom4j.*;

import java.util.*;

public class XmlStr {

    public static void main(String[] args) throws Exception {

        String xmlStr = "<returnInfo><resultInfo><returnCode>SUC</returnCode><codeDesc>成功</codeDesc></resultInfo><routeInfo><maxRate>2048</maxRate></routeInfo></returnInfo>";
        Map<String, String> retMap = iterateWholeXML(xmlStr);

        /*Map<String, String> retMap = new HashMap<String, String>();
        for (int i = 0; i < resultList.size(); i++) {
            Map map = (Map) resultList.get(i);

            for (Iterator iterator = map.keySet().iterator(); iterator.hasNext();) {
                String key = (String) iterator.next();
                retMap.put(key, (String) map.get(key));

            }
        }*/
        System.out.println("reMap" + retMap);

    }

    /**
     * 递归解析任意的xml 遍历每个节点和属性
     *
     * @param xmlStr
     */
    public static Map<String, String> iterateWholeXML(String xmlStr) {

        List<Map<String, String>> list = new ArrayList<Map<String, String>>();

        try {
            Document document = DocumentHelper.parseText(xmlStr);
            Element root = document.getRootElement();
            recursiveNode(root, list);
            Map<String, String> retMap = new HashMap<String, String>();
            for (int i = 0; i < list.size(); i++) {
                Map map = (Map) list.get(i);

                for (Iterator iterator = map.keySet().iterator(); iterator.hasNext();) {
                    String key = (String) iterator.next();
                    retMap.put(key, (String) map.get(key));

                }
            }
            String s = JSON.toJSONString(retMap);
            System.out.println(s);
            return retMap;
        } catch (DocumentException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 递归遍历所有的节点获得对应的值
     *
     * @param
     */
    private static void recursiveNode(Element root, List<Map<String, String>> list) {

        // 遍历根结点的所有孩子节点
        HashMap<String, String> map = new HashMap<String, String>();
        for (Iterator iter = root.elementIterator(); iter.hasNext();) {
            Element element = (Element) iter.next();
            if (element == null)
                continue;
            // 获取属性和它的值
            for (Iterator attrs = element.attributeIterator(); attrs.hasNext();) {
                Attribute attr = (Attribute) attrs.next();
                System.out.println(attr);
                if (attr == null)
                    continue;
                String attrName = attr.getName();
                System.out.println("attrname" + attrName);
                String attrValue = attr.getValue();

                map.put(attrName, attrValue);
            }
            // 如果有PCDATA，则直接提出
            if (element.isTextOnly()) {
                String innerName = element.getName();
                String innerValue = element.getText();

                map.put(innerName, innerValue);
                list.add(map);
            } else {
                // 递归调用
                recursiveNode(element, list);
            }
        }
    }

}

三、HttpsClient工具类

最简单的方法是忽略ssl证书并信任任何连接。这种方法对于生产代码不可接受，因为它违反了使用HTTPS的目的。但是，在某些用例中，如果您想快速尝试一些事情，可以采用这种方法。

信任任何证书方法（简单，不建议用于生产代码。）

import javax.net.ssl.SSLContext;
import javax.net.ssl.X509TrustManager;

import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;

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

import java.security.SecureRandom;

public class HttpClientFactory {

    private static CloseableHttpClient client;

    public static HttpClient getHttpsClient() throws Exception {

        if (client != null) {
            return client;
        }
        SSLContext sslcontext = SSLContexts.custom().useSSL().build();
        sslcontext.init(null, new X509TrustManager\[\]{new HttpsTrustManager()}, new SecureRandom());
        SSLConnectionSocketFactory factory = new SSLConnectionSocketFactory(sslcontext,
                SSLConnectionSocketFactory.BROWSER\_COMPATIBLE\_HOSTNAME\_VERIFIER);
        client = HttpClients.custom().setSSLSocketFactory(factory).build();

        return client;
    }

    public static void releaseInstance() {
        client = null;
    }
}

上面的方法将返回httpClient对象，该对象可用于进行任何HTTPS调用。从现在开始执行HTTPS调用与进行HTTP调用没有什么不同。因此，您可以为工厂提供两种方法，一种用于安全，另一种用于非安全。

在这里，我们使用了HttpsTrustManager，它只不过是分散所有客户端而已。只需实现X509TrustManager并自动生成所有方法即可完成。

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.X509TrustManager;

public class HttpsTrustManager implements X509TrustManager {

    @Override
    public void checkClientTrusted(X509Certificate\[\] arg0, String arg1)
            throws CertificateException {
        // TODO Auto-generated method stub

    }

    @Override
    public void checkServerTrusted(X509Certificate\[\] arg0, String arg1)
            throws CertificateException {
        // TODO Auto-generated method stub

    }

    @Override
    public X509Certificate\[\] getAcceptedIssuers() {
        return new X509Certificate\[\]{};
    }

}

导入密钥库（推荐）

如果您要编写产品质量代码，则应该考虑这种方法。在您的应用程序中拥有所有密钥，并使用这些密钥库创建一个SSLContext。然后可以将创建的SSLContext注入SSLConnectionSocketFactory，其余步骤将相同。

import javax.net.ssl.SSLContext;

import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.KeyManagementException;

public class HttpClientFactory {

    private static CloseableHttpClient client;

    public static HttpClient getHttpsClient() throws Exception {

        if (client != null) {
            return client;
        }
        SSLContext sslcontext = getSSLContext();
        SSLConnectionSocketFactory factory = new SSLConnectionSocketFactory(sslcontext,
                SSLConnectionSocketFactory.BROWSER\_COMPATIBLE\_HOSTNAME\_VERIFIER);
        client = HttpClients.custom().setSSLSocketFactory(factory).build();

        return client;
    }

    public static void releaseInstance() {
        client = null;
    }

    private SSLContext getSSLContext() throws KeyStoreException,
    NoSuchAlgorithmException, CertificateException, IOException, KeyManagementException {
        KeyStore trustStore  = KeyStore.getInstance(KeyStore.getDefaultType());
        FileInputStream instream = new FileInputStream(new File("my.keystore"));
        try {
            trustStore.load(instream, "nopassword".toCharArray());
        } finally {
            instream.close();
        }
        return SSLContexts.custom()
                .loadTrustMaterial(trustStore)
                .build();
    }
}

两种方法之间的唯一区别是创建SSLContext的方式。

四、SpringBoot  RestTemplate

import org.springframework.http.*;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

public class HttpClient {

    /**
     * post
     * @param url       url
     * @param params    params
     * @return  AdToutiaoJsonTokenData
     */
    public static String sendPostRequest(String url, MultiValueMap<String, String> params){
        RestTemplate client = new RestTemplate();
        //新建Http头，add方法可以添加参数
        HttpHeaders headers = new HttpHeaders();
        //设置请求发送方式
        HttpMethod method = HttpMethod.POST;
        // 以表单的方式提交
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        //将请求头部和参数合成一个请求
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);
        //执行HTTP请求，将返回的结构使用String 类格式化（可设置为对应返回值格式的类）
        ResponseEntity<String> response = client.exchange(url, method, requestEntity,String .class);

        return response.getBody();
    }

    /**
     * 向目的URL发送get请求
     * @param url       目的url
     * @param params    发送的参数
     * @param headers   发送的http头，可在外部设置好参数后传入
     * @return  String
     */
    public static String sendGetRequest(String url, MultiValueMap<String, String> params,HttpHeaders headers){
        RestTemplate client = new RestTemplate();

        HttpMethod method = HttpMethod.GET;
        // 以表单的方式提交
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        //将请求头部和参数合成一个请求
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);
        //执行HTTP请求，将返回的结构使用String 类格式化
        ResponseEntity<String> response = client.exchange(url, method, requestEntity, String.class);

        return response.getBody();
    }
　　

public GetUuidResponseVo getId(){
    RequestIDVO requestIDVO = new RequestIDVO();
    requestIDVO.setName(ruquestIDEnum.getName());
    requestIDVO.setPlatId(ruquestIDEnum.getPlatId());
    HttpHeaders headers = new HttpHeaders();
    MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
    headers.setContentType(type);
    headers.add("Accept", MediaType.APPLICATION_JSON.toString());
    Gson gson = new Gson();
    HttpEntity<String> formEntity = new HttpEntity<String>(gson.toJson(requestIDVO), headers);
    String result = restTemplate.postForObject(ruquestIDEnum.getUrl(), formEntity, String.class);
    GetUuidResponseVo getUuidResponseVo = gson.fromJson(result,GetUuidResponseVo.class);
    return getUuidResponseVo;
}

}

RestTemplate 工具类

package javax.utils;

import java.util.Map;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

/**
 * RestTemplate 远程调用工具类
 *
 */
public class RestTemplateUtils {

    private static final RestTemplate restTemplate = new RestTemplate();

    // ----------------------------------GET-------------------------------------------------------

    /**
     * GET请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, Class<T> responseType) {
        return restTemplate.getForEntity(url, responseType);
    }

    /**
     * GET请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, Class<T> responseType, Object... uriVariables) {
        return restTemplate.getForEntity(url, responseType, uriVariables);
    }

    /**
     * GET请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.getForEntity(url, responseType, uriVariables);
    }

    /**
     * 带请求头的GET请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, Map<String, String> headers, Class<T> responseType, Object... uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return get(url, httpHeaders, responseType, uriVariables);
    }

    /**
     * 带请求头的GET请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, HttpHeaders headers, Class<T> responseType, Object... uriVariables) {
        HttpEntity<?> requestEntity = new HttpEntity<>(headers);
        return exchange(url, HttpMethod.GET, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的GET请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, Map<String, String> headers, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return get(url, httpHeaders, responseType, uriVariables);
    }

    /**
     * 带请求头的GET请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> get(String url, HttpHeaders headers, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<?> requestEntity = new HttpEntity<>(headers);
        return exchange(url, HttpMethod.GET, requestEntity, responseType, uriVariables);
    }

    // ----------------------------------POST-------------------------------------------------------

    /**
     * POST请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @return
     */
    public static <T> ResponseEntity<T> post(String url, Class<T> responseType) {
        return restTemplate.postForEntity(url, HttpEntity.EMPTY, responseType);
    }

    /**
     * POST请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, Object requestBody, Class<T> responseType) {
        return restTemplate.postForEntity(url, requestBody, responseType);
    }

    /**
     * POST请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, Object requestBody, Class<T> responseType, Object... uriVariables) {
        return restTemplate.postForEntity(url, requestBody, responseType, uriVariables);
    }

    /**
     * POST请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.postForEntity(url, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的POST请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return post(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的POST请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return post(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的POST请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return post(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的POST请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return post(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的POST请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, HttpEntity<?> requestEntity, Class<T> responseType, Object... uriVariables) {
        return restTemplate.exchange(url, HttpMethod.POST, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的POST请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> post(String url, HttpEntity<?> requestEntity, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.exchange(url, HttpMethod.POST, requestEntity, responseType, uriVariables);
    }

    // ----------------------------------PUT-------------------------------------------------------

    /**
     * PUT请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, Class<T> responseType, Object... uriVariables) {
        return put(url, HttpEntity.EMPTY, responseType, uriVariables);
    }

    /**
     * PUT请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody);
        return put(url, requestEntity, responseType, uriVariables);
    }

    /**
     * PUT请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody);
        return put(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的PUT请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return put(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的PUT请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return put(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的PUT请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return put(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的PUT请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return put(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的PUT请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, HttpEntity<?> requestEntity, Class<T> responseType, Object... uriVariables) {
        return restTemplate.exchange(url, HttpMethod.PUT, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的PUT请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> put(String url, HttpEntity<?> requestEntity, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.exchange(url, HttpMethod.PUT, requestEntity, responseType, uriVariables);
    }

    // ----------------------------------DELETE-------------------------------------------------------

    /**
     * DELETE请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Class<T> responseType, Object... uriVariables) {
        return delete(url, HttpEntity.EMPTY, responseType, uriVariables);
    }

    /**
     * DELETE请求调用方式
     *
     * @param url 请求URL
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Class<T> responseType, Map<String, ?> uriVariables) {
        return delete(url, HttpEntity.EMPTY, responseType, uriVariables);
    }

    /**
     * DELETE请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * DELETE请求调用方式
     *
     * @param url 请求URL
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Map<String, String> headers, Class<T> responseType, Object... uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return delete(url, httpHeaders, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpHeaders headers, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(headers);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Map<String, String> headers, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return delete(url, httpHeaders, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpHeaders headers, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(headers);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return delete(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Object... uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, Map<String, String> headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setAll(headers);
        return delete(url, httpHeaders, requestBody, responseType, uriVariables);
    }

    /**
     * 带请求头的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param headers 请求头参数
     * @param requestBody 请求参数体
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpHeaders headers, Object requestBody, Class<T> responseType, Map<String, ?> uriVariables) {
        HttpEntity<Object> requestEntity = new HttpEntity<Object>(requestBody, headers);
        return delete(url, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpEntity<?> requestEntity, Class<T> responseType, Object... uriVariables) {
        return restTemplate.exchange(url, HttpMethod.DELETE, requestEntity, responseType, uriVariables);
    }

    /**
     * 自定义请求头和请求体的DELETE请求调用方式
     *
     * @param url 请求URL
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> delete(String url, HttpEntity<?> requestEntity, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.exchange(url, HttpMethod.DELETE, requestEntity, responseType, uriVariables);
    }

    // ----------------------------------通用方法-------------------------------------------------------

    /**
     * 通用调用方式
     *
     * @param url 请求URL
     * @param method 请求方法类型
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，按顺序依次对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> exchange(String url, HttpMethod method, HttpEntity<?> requestEntity, Class<T> responseType, Object... uriVariables) {
        return restTemplate.exchange(url, method, requestEntity, responseType, uriVariables);
    }

    /**
     * 通用调用方式
     *
     * @param url 请求URL
     * @param method 请求方法类型
     * @param requestEntity 请求头和请求体封装对象
     * @param responseType 返回对象类型
     * @param uriVariables URL中的变量，与Map中的key对应
     * @return ResponseEntity 响应对象封装类
     */
    public static <T> ResponseEntity<T> exchange(String url, HttpMethod method, HttpEntity<?> requestEntity, Class<T> responseType, Map<String, ?> uriVariables) {
        return restTemplate.exchange(url, method, requestEntity, responseType, uriVariables);
    }

    /**
     * 获取RestTemplate实例对象，可自由调用其方法
     *
     * @return RestTemplate实例对象
     */
    public static RestTemplate getRestTemplate() {
        return restTemplate;
    }

}

spring - RestTemplate  http

import com.alibaba.fastjson.JSONObject;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.ResponseErrorHandler;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RestTemplateUtils {

    /**
     *  http 请求 GET
     * @param url 地址
     * @param params 参数
     * @param connecTimeout 连接时间
     * @param readTimeout 读取时间
     * @param retryCount 重试机制
     * @return String 类型
     */
    public static String getHttp(String url, JSONObject params,int connecTimeout,int readTimeout ,int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); // 异常处理
        url = expandURL(url, params.keySet());
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++){
            try {
                result = restTemplate.getForObject(url, String.class, params);
                return result;
            } catch (RestClientException e) {
                System.out.println("-----------开始-----------重试count: "+i);
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     *  https 请求 GET
     * @param url 地址
     * @param params 参数
     * @param connecTimeout 连接时间
     * @param readTimeout 读取时间
     * @param retryCount 重试机制
     * @return String 类型
     */
    public static String getHttps(String url, JSONObject params,int connecTimeout,int readTimeout ,int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); //error处理
        restTemplate.setRequestFactory(new HttpsClientRequestFactory()); // 绕过https
        url = expandURL(url, params.keySet());
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++){
            try {
                result = restTemplate.getForObject(url, String.class, params);
                return result;
            } catch (RestClientException e) {
                System.out.println("-----------开始-----------重试count: "+i);
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     *  http 请求 post
     * @param url 地址
     * @param params 参数
     * @param headersMap header
     * @param connecTimeout 连接时间
     * @param readTimeout 读取时间
     * @param retryCount 重试机制
     * @return String 类型
     */
    public static String postHttp(String url, JSONObject params, Map headersMap,int connecTimeout,int readTimeout,int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); // 时间函数
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        //内部实际实现为 HttpClient
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); // 异常处理的headers error 处理
        // 设置·header信息
        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.setAll(headersMap);
        HttpEntity<JSONObject> requestEntity = new HttpEntity<JSONObject>(params, requestHeaders); // josn utf-8 格式
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++){
            try {
                result = restTemplate.postForObject(url, requestEntity, String.class);
                return result;
            } catch (RestClientException e) {
                System.out.println("-----------开始-----------重试count: "+i);
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 加密参数类型请求  application/x-www-form-urlencoded
     *  MultiValueMap<String, Object>
     * 采用 HttpEntity<MultiValueMap<String, Object>> 构造
     *  http 请求 post
     * @param url 地址
     * @param
     * @param headersMap header
     * @param connecTimeout 连接时间
     * @param readTimeout 读取时间
     * @param retryCount 重试机制
     * @return String 类型
     */
    public static String postHttpEncryption(String url, MultiValueMap<String, Object> postParameters, Map headersMap, int connecTimeout, int readTimeout, int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); // 时间函数
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        //内部实际实现为 HttpClient
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); // 异常处理的headers error 处理
        // 设置·header信息
        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.setAll(headersMap);
        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(postParameters, requestHeaders);
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++){
            try {
                result  = restTemplate.postForObject(url, requestEntity, String.class);
                return result;
            } catch (RestClientException e) {
                System.out.println("-----------开始-----------重试count: "+i);
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     * @param url 请求地址
     * @param params 请求 josn 格式参数
     * @param headersMap headers 头部需要参数
     * @param retryCount 重试机制
     * @return 返回string类型返回值
     * 参数json方法传递
     */
    public static String postHttps(String url, JSONObject params, Map headersMap,int connecTimeout,int readTimeout,int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); // 时间函数
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        //内部实际实现为 HttpClient
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setRequestFactory(new HttpsClientRequestFactory()); // 绕过https
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); // 异常处理的headers error 处理
        // 设置·header信息
        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.setAll(headersMap);
        HttpEntity<JSONObject> requestEntity = new HttpEntity<JSONObject>(params, requestHeaders); // josn utf-8 格式
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++){
            try {
                result = restTemplate.postForObject(url, requestEntity, String.class);
                return result;
            } catch (RestClientException e) {
                System.out.println("-----------开始-----------重试count: "+i);
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     * http 请求 post
     *
     * @param url           地址
     * @param params        参数
     * @param headersMap    header
     * @param connecTimeout 连接时间
     * @param readTimeout   读取时间
     * @param retryCount    重试机制
     * @return String 类型
     * 参数是以普通的post参数传递，非json传递参数
     */
    public static String commonPostHttp(String url, Map params, Map headersMap, int connecTimeout, int readTimeout, int retryCount) {
        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); // 时间函数
        requestFactory.setConnectTimeout(connecTimeout);
        requestFactory.setReadTimeout(readTimeout);
        //内部实际实现为 HttpClient
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); // 设置编码集
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler()); // 异常处理的headers error 处理
        // 设置·header信息
        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.setAll(headersMap);

        HttpEntity<Map> requestEntity = new HttpEntity<Map>(params, requestHeaders); // josn utf-8 格式
        String result = null; // 返回值类型;
        for (int i = 1; i <= retryCount; i++) {
            try {
                result = restTemplate.postForObject(url, requestEntity, String.class);
                return result;
            } catch (RestClientException e) {
                log.error("-----------开始-----------重试count: " + i);
                e.printStackTrace();
            }
        }
        return result;
    }

    private static MultiValueMap<String, String> createMultiValueMap(JSONObject params) {
        MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
        for (String key : params.keySet()) {
            if (params.get(key) instanceof List) {
                for (Iterator<String> it = ((List<String>) params.get(key)).iterator(); it.hasNext(); ) {
                    String value = it.next();
                    map.add(key, value);
                }
            } else {
                map.add(key, params.getString(key));
            }
        }
        return map;
    }

    /**
     * @param url
     * @param keys
     * @return
     * @Title: expandURL
     * @author:
     * @Description: TODO
     * @return: String
     */
    private static String expandURL(String url, Set<?> keys) {
        final Pattern QUERY_PARAM_PATTERN = Pattern.compile("([^&=]+)(=?)([^&]+)?");
        Matcher mc = QUERY_PARAM_PATTERN.matcher(url);
        StringBuilder sb = new StringBuilder(url);
        if (mc.find()) {
            sb.append("&");
        } else {
            sb.append("?");
        }

        for (Object key : keys) {
            sb.append(key).append("=").append("{").append(key).append("}").append("&");
        }
        return sb.deleteCharAt(sb.length() - 1).toString();
    }

    /**
     * @ClassName: DefaultResponseErrorHandler
     * @Description: TODO
     * @author:
     * @date: 2
     */
    private static class DefaultResponseErrorHandler implements ResponseErrorHandler {

        /** 对response进行判断，如果是异常情况，返回true */
        @Override
        public boolean hasError(ClientHttpResponse response) throws IOException {
            return response.getStatusCode().value() != HttpServletResponse.SC_OK;
        }

        /** 异常情况时的处理方法 */
        @Override
        public void handleError(ClientHttpResponse response) throws IOException {
            BufferedReader br = new BufferedReader(new InputStreamReader(response.getBody()));
            StringBuilder sb = new StringBuilder();
            String str = null;
            while ((str = br.readLine()) != null) {
                sb.append(str);
            }
            try {
                throw new Exception(sb.toString());
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

绕过Https 工具类

import org.springframework.http.client.SimpleClientHttpRequestFactory;

import javax.net.ssl.*;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.Socket;
import java.security.cert.X509Certificate;

/**
 * Https 绕过
 */
public class HttpsClientRequestFactory extends SimpleClientHttpRequestFactory {

    @Override
    protected void prepareConnection(HttpURLConnection connection, String httpMethod) {
        try {
            if (!(connection instanceof HttpsURLConnection)) {
                throw new RuntimeException("An instance of HttpsURLConnection is expected");
            }

            HttpsURLConnection httpsConnection = (HttpsURLConnection) connection;

            TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @Override
                        public X509Certificate[] getAcceptedIssuers() {
                            return null;
                        }
                        @Override
                        public void checkClientTrusted(X509Certificate[] certs, String authType) {
                        }
                        @Override
                        public void checkServerTrusted(X509Certificate[] certs, String authType) {
                        }

                    }
            };
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
            httpsConnection.setSSLSocketFactory(new MyCustomSSLSocketFactory(sslContext.getSocketFactory()));

            httpsConnection.setHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String s, SSLSession sslSession) {
                    return true;
                }
            });

            super.prepareConnection(httpsConnection, httpMethod);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * We need to invoke sslSocket.setEnabledProtocols(new String[] {"SSLv3"});
     * see http://www.oracle.com/technetwork/java/javase/documentation/cve-2014-3566-2342133.html (Java 8 section)
     */
    // SSLSocketFactory用于创建 SSLSockets
    private static class MyCustomSSLSocketFactory extends SSLSocketFactory {

        private final SSLSocketFactory delegate;

        public MyCustomSSLSocketFactory(SSLSocketFactory delegate) {
            this.delegate = delegate;
        }

        // 返回默认启用的密码套件。除非一个列表启用，对SSL连接的握手会使用这些密码套件。
        // 这些默认的服务的最低质量要求保密保护和服务器身份验证
        @Override
        public String[] getDefaultCipherSuites() {
            return delegate.getDefaultCipherSuites();
        }

        // 返回的密码套件可用于SSL连接启用的名字
        @Override
        public String[] getSupportedCipherSuites() {
            return delegate.getSupportedCipherSuites();
        }

        @Override
        public Socket createSocket(final Socket socket, final String host, final int port,
                                   final boolean autoClose) throws IOException {
            final Socket underlyingSocket = delegate.createSocket(socket, host, port, autoClose);
            return overrideProtocol(underlyingSocket);
        }

        @Override
        public Socket createSocket(final String host, final int port) throws IOException {
            final Socket underlyingSocket = delegate.createSocket(host, port);
            return overrideProtocol(underlyingSocket);
        }

        @Override
        public Socket createSocket(final String host, final int port, final InetAddress localAddress,
                                   final int localPort) throws
                IOException {
            final Socket underlyingSocket = delegate.createSocket(host, port, localAddress, localPort);
            return overrideProtocol(underlyingSocket);
        }

        @Override
        public Socket createSocket(final InetAddress host, final int port) throws IOException {
            final Socket underlyingSocket = delegate.createSocket(host, port);
            return overrideProtocol(underlyingSocket);
        }

        @Override
        public Socket createSocket(final InetAddress host, final int port, final InetAddress localAddress,
                                   final int localPort) throws
                IOException {
            final Socket underlyingSocket = delegate.createSocket(host, port, localAddress, localPort);
            return overrideProtocol(underlyingSocket);
        }

        private Socket overrideProtocol(final Socket socket) {
            if (!(socket instanceof SSLSocket)) {
                throw new RuntimeException("An instance of SSLSocket is expected");
            }
            ((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1"});
            return socket;
        }
    }
}