Could not get JDBC Connection； nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver

Type Exception Report

Message Could not get JDBC Connection; nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
	org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:390)
	org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:470)
	org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:480)
	com.example.dao.impl.UserDaoImpl.findAll(UserDaoImpl.java:20)
	com.example.service.impl.UserServiceImpl.findAll(UserServiceImpl.java:16)
	com.example.web.servlet.UserListServlet.doPost(UserListServlet.java:22)
	com.example.web.servlet.UserListServlet.doGet(UserListServlet.java:31)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

检查mysql-connector-java包 版本是否与数据库版本对应