使用Flowable - UI MYSQL 数据库启动异常 Cannot load driver class: com.mysql.cj.jdbc.Driver

 [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver

不一样的版本问题解决方式也不一样，一些配置文件驱动类写错或者加空格的低级错误就不要看了。

我下载的flowable版本：

https://github.com/flowable/flowable-engine/releases/tag/flowable-6.7.2

使用spring.datasource.driver-class-name=com.mysql.jdbc.Driver

报错：

 [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver

解决：

将flowable-ui\WEB-INF\lib  下面 mysql-connector-java-5.1.45-sources.jar  

替换成mysql-connector-java-8.0.27.jar

修改驱动：

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

重启正常