Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_351]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_351]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_351]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_351]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:338) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.negotiateSSLConnection(NativeAuthenticationProvider.java:777) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:486) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1340) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.NativeSession.connect(NativeSession.java:157) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
... 57 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:171) ~[na:1.8.0_351]
at sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:106) ~[na:1.8.0_351]
at sun.security.ssl.TransportContext.kickstart(TransportContext.java:238) ~[na:1.8.0_351]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:410) ~[na:1.8.0_351]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:389) ~[na:1.8.0_351]
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:316) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:329) ~[mysql-connector-java-8.0.18.jar!/:8.0.18]
... 64 common frames omittedcentos上运行java -jar 报错，，， windows上能运行，，，
原因：jdk问题，，
修改jre中的 java.security ----Linux 默认路径/usr/lib/jvm/jdk/jre/lib/security
vi 进去删除jdk.tls.disabledAlgorithms=后的出现的SSLv3, TLSv1, TLSv1.1 即可
引用：https://blog.csdn.net/weixin_47314924/article/details/132591948