HttpURLConnection ssl证书校验问题（java.security.cert.CertificateException）

HttpURLConnection校验问题
在请求的时候遇到报错：
java.security.cert.CertificateException: No subject alternative names present
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1946)
**
对应代码以及报错：

0x01 HttpURLConnection ssl报错解决办法

**
这种报错是校验了服务端证书，如果本地证书库没有信任网站证书，这种证书一般是自己生成的或者不是权威机构颁发的证书
解决办法：在请求之前调用ignoreSsl()方法

/*    */
/*    */ import java.security.cert.X509Certificate;
/*    */ import javax.net.ssl.SSLContext;
/*    */
/*    */ public class SslUtils
        /*    */ {
    /*    */   private static void trustAllHttpsCertificates() throws Exception
    /*    */   {
        /* 10 */     javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
        /* 11 */     javax.net.ssl.TrustManager tm = new miTM();
        /* 12 */     trustAllCerts[0] = tm;
        /* 13 */     SSLContext sc = SSLContext.getInstance("SSL");
        /* 14 */     sc.init(null, trustAllCerts, null);
        /* 15 */     javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        /*    */   }
    /*    */
    /*    */   static class miTM implements javax.net.ssl.TrustManager, javax.net.ssl.X509TrustManager {
        /*    */     public X509Certificate[] getAcceptedIssuers() {
            /* 20 */       return null;
            /*    */     }
        /*    */
        /*    */     public boolean isServerTrusted(X509Certificate[] certs) {
            /* 24 */       return true;
            /*    */     }
        /*    */
        /*    */     public boolean isClientTrusted(X509Certificate[] certs) {
            /* 28 */       return true;
            /*    */     }
        /*    */
        /*    */
        /*    */
        /*    */     public void checkServerTrusted(X509Certificate[] certs, String authType)
        /*    */       throws java.security.cert.CertificateException
        /*    */     {}
        /*    */
        /*    */
        /*    */     public void checkClientTrusted(X509Certificate[] certs, String authType)
        /*    */       throws java.security.cert.CertificateException
        /*    */     {}
        /*    */   }
    /*    */
    /*    */
    /*    */   public static void ignoreSsl()
    /*    */     throws Exception
    /*    */   {
        /* 47 */     javax.net.ssl.HostnameVerifier hv = new javax.net.ssl.HostnameVerifier() {
            /*    */       public boolean verify(String urlHostName, javax.net.ssl.SSLSession session) {
                /* 49 */         return true;
                /*    */       }
            /* 51 */     };
        /* 52 */     trustAllHttpsCertificates();
        /* 53 */     javax.net.ssl.HttpsURLConnection.setDefaultHostnameVerifier(hv);
        /*    */   }
    /*    */ }

解决方案：

    public static void main(String[] args) throws Exception {
        String result="null";
//        ignoreSsl();
        URL url = new URL ("https://xx.xx.xx.xx/");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
//        connection.connect();
        //得到响应码
        int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            StringBuilder sb = new StringBuilder();
            //得到响应流
            InputStream is = connection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader (is, "utf-8"));

            String line = "";
            while ((line = reader.readLine()) != null) {
                sb.append(line).append("\n");
            }
            System.out.println (sb);
            is.close();
            connection.disconnect();
        }
}