Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
中文翻译为：
加载类“com.mysql.jdbc.Driver”。这是弃用。新的驱动程序类是' com.mysql.cj.jdbc.Driver'。驱动程序是通过SPI自动注册的，手动加载驱动程序类通常是不必要的。
上述提示：是原驱动程序已经弃用了，需要更改为新的注册驱动程序。
更改注册驱动参数如下：
原注册驱动：
Class.forName("com.mysql.jdbc.Driver");
更改后的注册驱动：
Class.forName("com.mysql.cj.jdbc.Driver");
报错信息：Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2. Exception in thread "main" java.lang.ClassNotFoundException: com.mysql.cj.jbdc.Driver
工具类路径写错了
3. Exception in thread "main" java.sql.SQLException: Access denied for user 'roo'@'localhost'
数据库连接时，密码写错了
4. Exception in thread "main" java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'password=''' at line 1
Sql语法错误
