异常()()(常见的异常)

执行mysql数据库操作的时候，出现以下异常信息：

java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:868) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:864) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1746) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2205) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2236) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2035) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:790) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_181]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_181]
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:400) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330) ~[mysql-connector-java-5.1.41.jar:5.1.41]
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:156) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.filter.FilterAdapter.connection_connect(FilterAdapter.java:787) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:251) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1659) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1723) ~[druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:927) [druid-1.2.8.jar:1.2.8]
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1401) [druid-1.2.8.jar:1.2.8]

MySQL数据库版本是8.0.27（查看MySQL版本：select version();），但使用的mysql-connector-java版本是5.1.41。
MySQL8.x版本的验证模块和之前版本不同：
8.x版本是：default_authentication_plugin=caching_sha2_password
5.x版本是：default_authentication_plugin=mysql_native_password

将MySQL驱动改为更高版本！！
同时可以把driver-class-name 改为 com.mysql.cj.jdbc.Driver，老的com.mysql.jdbc.Driver 已经被弃用了。

    mysql
    mysql-connector-java
    8.0.28

感谢阅读，下次再见。ヾ(￣▽￣)Bye_Bye！