PKIX: unable to find valid certification path to requested target

// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[]{
        new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return new java.security.cert.X509Certificate[]{};
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }
        }
};

try {
    SSLContext context = SSLContext.getInstance("TLS");
    context.init(null, trustAllCerts, new java.security.SecureRandom());
    // ... 使用 context 获取 SSLSocketFactory
} catch (NoSuchAlgorithmException e) {
    throw new IllegalStateException(e);
} catch (KeyManagementException e) {
    throw new IllegalStateException(e);
}