原文参照：http://blog.csdn.net/guozili1/article/details/53995121

import javax.net.ssl.*;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;

/**
 * https请求工具类
 *
 * @author seer
 * @date 2018/3/6 9:12
 */
public class HttpsUtils {
    /*
     * https请求是在http请求的基础上加上一个ssl层
     */

    public static String doPost(String requestUrl, String bodyStr, Map<String, String> header, String charset, String contentType) throws Exception {
        System.out.printf("--- https post 请求地址:%s 内容:%s", requestUrl, bodyStr);
        charset = null == charset ? "utf-8" : charset;

        // 创建SSLContext
        SSLContext sslContext = SSLContext.getInstance("SSL");
        TrustManager[] trustManagers = {new X509TrustManager() {
            /*
             * 实例化一个信任连接管理器
             * 空实现是所有的连接都能访问
             */
            @Override
            public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

            }

            @Override
            public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        }};
        // 初始化
        sslContext.init(null, trustManagers, new SecureRandom());
        SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

        URL url = new URL(requestUrl);
        HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
        httpsURLConnection.setSSLSocketFactory(sslSocketFactory);

        // 以下参照http请求
        httpsURLConnection.setDoOutput(true);
        httpsURLConnection.setDoInput(true);
        httpsURLConnection.setUseCaches(false);
        httpsURLConnection.setRequestMethod("POST");
        httpsURLConnection.setRequestProperty("Accept-Charset", charset);
        if (null != bodyStr) {
            httpsURLConnection.setRequestProperty("Content-Length", String.valueOf(bodyStr.length()));
        }
        if (contentType == null) {
            httpsURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        } else {
            httpsURLConnection.setRequestProperty("Content-Type", contentType);
        }
        if (!header.isEmpty()) {
            for (Map.Entry<String, String> entry : header.entrySet()) {
                httpsURLConnection.setRequestProperty(entry.getKey(), entry.getValue());
            }
        }
        httpsURLConnection.connect();

        // 读写内容
        OutputStream outputStream = null;
        InputStream inputStream = null;
        InputStreamReader streamReader = null;
        BufferedReader bufferedReader = null;
        StringBuffer stringBuffer;
        try {
            if (null != bodyStr) {
                outputStream = httpsURLConnection.getOutputStream();
                outputStream.write(bodyStr.getBytes(charset));
                outputStream.close();
            }

            if (httpsURLConnection.getResponseCode() >= 300) {
                throw new Exception("https post failed, response code " + httpsURLConnection.getResponseCode());
            }

            inputStream = httpsURLConnection.getInputStream();
            streamReader = new InputStreamReader(inputStream, charset);
            bufferedReader = new BufferedReader(streamReader);
            stringBuffer = new StringBuffer();
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                stringBuffer.append(line);
            }
        } catch (Exception e) {
            throw e;
        } finally {
            if (outputStream != null) {
                outputStream.close();
            }
            if (inputStream != null) {
                inputStream.close();
            }
            if (streamReader != null) {
                streamReader.close();
            }
            if (bufferedReader != null) {
                bufferedReader.close();
            }
        }
        System.out.printf("--- https post 返回内容:%s", stringBuffer.toString());
        return stringBuffer.toString();
    }

    public static void main(String[] args) {
        String url = args[0];
        String content = args[1];
        try {
            HttpsUtils.doPost(url, content, null, null, null);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}