我试图访问第三方API，但出现错误。 我启用了SSL调试，发现了以下错误。
%% Invalidated: [Session-2, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384]
main, SEND TLSv1.2 ALERT: fatal, description = certificate_unknown
main, WRITE: TLSv1.2 Alert, length = 2
main, called closeSocket()
main, handling exception: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
我已经安装了JCE限制和不受限制的策略，但是仍然遇到问题。
我正在使用jdk1.8.0_161。