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:170) ~[?:?]
     at sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:98) ~[?:?]
     at sun.security.ssl.TransportContext.kickstart(TransportContext.java:238) ~[?:?]
     at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:394) ~[?:?]
     at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:373) ~[?:?]
     at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:336) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:325) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:164) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1342) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.NativeSession.connect(NativeSession.java:157) ~[mysql-connector-java-8.0.20.jar:8.0.20]
     at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850) ~[mysql-connector-java-8.0.20.jar:8.0.20]

原因： 配置文件中禁用 TLSv1, TLSv1.1

解决方法：

  ..\Java\jdk-11.0.11\conf\security

将 ：

jdk.tls.disabledAlgorithms=SSLv3, TLSv1, TLSv1.1, RC4, DES, MD5withRSA, \
     DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC, anon, NULL, \
     include jdk.disabled.namedCurves

替换为：

来源：https://www.cnblogs.com/zbw911/p/14873951.html