错误原因： 配置文件中 username 与 Mysql 关键字冲突
改为：
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create connection SQLException, url: jdbc:mysql://localhost:3306/test?, errorCode 1045, state 28000
create connection error, url: jdbc:mysql://**ip**:3306/*?errorCode 1045, state 28000
create connection SQLException, url: jdbc:mysql://localhost:3306/xxxx
ERROR 14856 --- [reate-882003853] com.alibaba.druid.pool.DruidDataSource : create connection error, url: jdbc:mysql://localhost:3306/xhb?useUnicode=true&characterEncoding=UTF-8, errorCode 1045, sta
springboot集成druid登陆mysql发生errorCode 1045, state 28000错误
【docker-compose】使用docker-compose启动spring-boot+mysql，服务内连数据库报错：create connection SQLException, url: jdbc:mysql://mysql:33061/swapping?useSSL=false&useUnicode=true&characterEncoding=UTF-8, errorCode 0,
init datasource error, url: jdbc:mysql://localhost:3306/test? 错误
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/xxx
Cannot create JDBC driver of class '' for connect URL 'jdbc:mysql://127.0.0.1:3306/test'