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
Caused by: java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.
原文：https://www.cnblogs.com/sandyyeh/p/14269905.html