请求https无证书

1. 报错信息：

2. 解决方式：

本地代码调试，需要导入证书到JDK

-- 在cmd中执行以下命令，需要注意的是cmd需要管理权限运行，注意路径问题
keytool -import -keystore cacerts -file XXXX.file
默认密码： changeit

3. 证书来源，如果有网页，可以在网页中找到

javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:128) ~[na:na]
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:321) ~[na:na]
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264) ~[na:na]
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:259) ~[na:na]
	at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:642) ~[na:na]
	at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(CertificateMessage.java:461) ~[na:na]
	at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(CertificateMessage.java:361) ~[na:na]
	at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392) ~[na:na]
	at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:444) ~[na:na]
	at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:421) ~[na:na]
	at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:178) ~[na:na]
	at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:164) ~[na:na]
	at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1152) ~[na:na]
	at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1063) ~[na:na]
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:402) ~[na:na]
	at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:404) ~[httpclient-4.5.7.jar!/:4.5.7]
	at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:364) ~[httpclient-4.5.7.jar!/:4.5.7]
	at com.amazonaws.http.conn.ssl.SdkTLSSocketFactory.connectSocket(SdkTLSSocketFactory.java:142) ~[aws-java-sdk-core-1.11.415.jar!/:na]
	at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142) ~[httpclient-