用Https协议发送post请求 HttpsClient

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

/**
 * @author ks
 * @date 2018-04-25
 * https工具类
 */
public class HttpsUtil{
 
private static class TrustAnyTrustManager implements X509TrustManager {
 
        public void checkClientTrusted(X509Certificate[] chain, String authType)
                throws CertificateException {
        }
 
        public void checkServerTrusted(X509Certificate[] chain, String authType)
                throws CertificateException {
        }
 
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[] {};
        }
}
 
private static class TrustAnyHostnameVerifier implements HostnameVerifier {
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
}
 
 
/**
* post方式请求服务器(https协议)
* @param url
*            请求地址
* @param content
*            参数
* @param charset
*            编码
* @return
* @throws NoSuchAlgorithmException
* @throws KeyManagementException
* @throws IOException
*/
public static String post(String url, String content)
            throws NoSuchAlgorithmException, KeyManagementException,
            IOException {
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },
                new java.security.SecureRandom());
 
        URL console = new URL(url);
        HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
        conn.setDoOutput(true);
        conn.addRequestProperty("connection", "Keep-Alive");
//        conn.setSSLSocketFactory(sc.getSocketFactory());
        conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
        conn.connect();
        DataOutputStream out = new DataOutputStream(conn.getOutputStream());
        out.write(content.getBytes("utf-8"));
        // 刷新、关闭
        out.flush();
        out.close();
        InputStream is = conn.getInputStream();
        if (is != null) {
            ByteArrayOutputStream outStream = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = is.read(buffer)) != -1) {
                outStream.write(buffer, 0, len);
            }
            is.close();
            if(outStream!=null){
            	return new String(outStream.toByteArray(),"utf-8");
            }
        }
        return null;
}
 
 public static void main(String[] args) {
	try {
		String str=HttpsUtil.post("https://api.mch.weixin.qq.com/pay/unifiedorder", "");
		System.out.println(str);
	} catch (KeyManagementException e) {
		e.printStackTrace();
	} catch (NoSuchAlgorithmException e) {
		e.printStackTrace();
	} catch (IOException e) {
		e.printStackTrace();
	}
}
}