这个时候是提示需要证书模式访问，如果是重要的接口，还是希望采用安装证书的方式。当然也有一种快捷的方式。就是忽略证书。

下面分享SOJSON.COM使用的一个类。

package com.sojson.www.zhanzhang.utils;

import java.security.cert.X509Certificate;
 
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
 
public class SslUtils {
 
    private static void trustAllHttpsCertificates() throws Exception {
        TrustManager[] trustAllCerts = new TrustManager[1];
        TrustManager tm = new miTM();
        trustAllCerts[0] = tm;
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }
 
    static class miTM implements TrustManager,X509TrustManager {
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
 
        public boolean isServerTrusted(X509Certificate[] certs) {
            return true;
        }

        public boolean isClientTrusted(X509Certificate[] certs) {
            return true;
        }

        public void checkServerTrusted(X509Certificate[] certs, String authType) {
            return;
        }
 
        public void checkClientTrusted(X509Certificate[] certs, String authType) {
            return;
        }
    }
     
    /**
     * 忽略HTTPS请求的SSL证书，必须在openConnection之前调用
     * @throws Exception
     */
    public static void ignoreSsl() throws Exception{
        HostnameVerifier hv = (urlHostName, session) -> true;
        trustAllHttpsCertificates();
        HttpsURLConnection.setDefaultHostnameVerifier(hv);
    }
}

在创建HTTP请求之前加入。

 if("https".equalsIgnoreCase(realUrl.getProtocol())){
                SslUtils.ignoreSsl();
            }
            // 打开和URL之间的连接
            conn = (HttpURLConnection) realUrl.openConnection();