how to resolve jsoup error: unable to find valid certification path to requested target

Note: JSoup has deprecated and removed the validateTLSCertificates method in version 1.12.1. See this answer for an alternative solution.

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Prior to JSoup version 1.12.1, ignore TLS validation as follows:

Document doc = Jsoup.connect("URL").timeout(10000).validateTLSCertificates(false).get();

Since reading the page also takes a while, increase the timeout timeout(10000).

The selected answer will not work with latest releases of JSoup as validateTLSCertificates is deprecated and removed. I have created the following helper class :

public class SSLHelper {

    static public Connection getConnection(String url){
        return Jsoup.connect(url).sslSocketFactory(SSLHelper.socketFactory());
    }

    static private SSLSocketFactory socketFactory() {
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }

            public void checkClientTrusted(X509Certificate[] certs, String authType) {
            }

            public void checkServerTrusted(X509Certificate[] certs, String authType) {
            }
        }};

        try {
            SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
            SSLSocketFactory result = sslContext.getSocketFactory();

            return result;
        } catch (NoSuchAlgorithmException | KeyManagementException e) {
            throw new RuntimeException("Failed to create a SSL socket factory", e);
        }
    }
}

Then I simply call it as follows:

Document doc = SSLHelper.getConnection(url).userAgent(USER_AGENT).get();

(*) - https://dzone.com/articles/how-setup-custom - helpful in coming up with the solution