mysql-connector-java 6版本的jdbc鏈接問題

使用新版本6的jdbc驅動，會出現下面的問題

Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_171]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_171]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_171]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_171]

就是未識別時區的問題，須要在jdbc鏈接的url上加上serverTimezone=UTC(世界標準時間)或者GMT（格林威治時間），寫成

private String url = "jdbc:mysql://localhost:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&serverTimezone=UTC";

   private String username = "root";

   private String password = "root";

   private String driverClassName = "com.mysql.cj.jdbc.Driver";

關於SSL鏈接的Warning SSL 是Secure Sockets Layer（安全套接層），能夠在URL後面再添加一個屬性useSSL=false就好了 若是你不須要使用SSL鏈接，你須要經過設置useSSL=false來顯式禁用SSL鏈接。 若是你須要用SSL鏈接，就要爲服務器證書驗證提供信任庫，並設置useSSL=true

private String url = "jdbc:mysql://localhost:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&serverTimezone=UTC&useSSL=false";