Caused by: java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.

 项目启动报错，错误信息如下：

Caused by: java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:868) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:864) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1746) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2198) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2045) ~[mysql-connector-java-5.1.43.jar:5.1.43]
    ... 62 common frames omitted

环境信息：

　　mysql 8.0.22

错误原因：

主要原因8.x版本的验证模块和之前版本不同：

5.x版本是：default_authentication_plugin=mysql_native_password

8.x版本是：default_authentication_plugin=caching_sha2_password

解决方法：

升级mysql 驱动

<dependency>
　　<groupId>mysql</groupId>
　　<artifactId>mysql-connector-java</artifactId>
　　<version>8.0.22</version>
　　<!--<version>5.1.22</version>-->
</dependency>

 注意升级完驱动需要修改

8.x:  driver-class-name=com.mysql.cj.jdbc.Driver

5.x:  driver-class-name=com.mysql.jdbc.Driver