报错信息：

javax.net.ssl.SSLHandshakeException：PKIX path building failed:sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

解决方法：

1. https://jadyer.cn/2012/07/29/ssl-pkix/
2. https://blog.csdn.net/frankcheng5143/article/details/52164939
3. https://blog.csdn.net/da_caoyuan/article/details/104343058