driver-class-name: com.mysql.jdb

抛红像这样：

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
</dependency>

解决办法是把scope设置去掉，使用缺省值

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
</dependency>

OK了，不红了。