javax.net.ssl.sslhandshakeException:sun.security.validator.validatorException:PKIX path buildind failed

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import java.util.Base64;

public class Base64Util {

    private static final Logger logger = LoggerFactory.getLogger(Base64Util.class);

    public static String getBase64ByUrl(String urlPath){

        ByteArrayOutputStream data = new ByteArrayOutputStream();

        try {

            URL url = new URL(urlPath);

            byte[] by = new byte[1024];

            URLConnection urlConnection = url.openConnection();

            HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;

            httpURLConnection.setConnectTimeout(1000*5);

            httpURLConnection.connect();

            InputStream inputStream = httpURLConnection.getInputStream();

            int len = -1;

            while ( (len = inputStream.read(by)) !=-1){

                data.write(by,0,len);

            }

            inputStream.close();

        } catch (Exception e) {

            logger.error("获取图片base64出错：" + e + ",图片url为：" + urlPath);

        }

        return Base64.getMimeEncoder().encodeToString(data.toByteArray());

    }

}

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import javax.net.ssl.HostnameVerifier;

import javax.net.ssl.HttpsURLConnection;

import javax.net.ssl.SSLSession;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import java.util.Base64;

public class Base64Util {

    private static final Logger logger = LoggerFactory.getLogger(Base64Util.class);

    public static String getBase64ByUrl(String urlPath){

        ByteArrayOutputStream data = new ByteArrayOutputStream();

        try {

            HostnameVerifier hv = new HostnameVerifier() {

                public boolean verify(String urlHostName, SSLSession session) {

                    System.out.println("Warning: URL Host: " + urlHostName + " vs. "

                            + session.getPeerHost());

                    return true;

                }

            };

            URL url = new URL(urlPath);

            byte[] by = new byte[1024];

            //忽略证书信任

            trustAllHttpsCertificates();

            HttpsURLConnection.setDefaultHostnameVerifier(hv);

            URLConnection urlConnection = url.openConnection();

            HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;

            httpURLConnection.setConnectTimeout(1000*5);

            httpURLConnection.connect();

            InputStream inputStream = httpURLConnection.getInputStream();

            int len = -1;

            while ( (len = inputStream.read(by)) !=-1){

                data.write(by,0,len);

            }

            inputStream.close();

        } catch (Exception e) {

            logger.error("获取图片base64出错：" + e + ",图片url为：" + urlPath);

        }

        return Base64.getMimeEncoder().encodeToString(data.toByteArray());

    }

    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;

        }

    }

}