springboot中，mybatis报错Caused by: java.lang.ClassNotFoundException: tk.mybatis.mapper.generator.Mapper

springboot当中，映射不成功报错。

报错信息：
Caused by: java.lang.RuntimeException: Cannot instantiate object of type tk.mybatis.mapper.generator.MapperPlugin
Caused by: java.lang.ClassNotFoundException: tk.mybatis.mapper.generator.MapperPlugin
           

解决办法：检查一下tk.mybatis.mapper插件，如果已经添加则尝试修改一下版本。

<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper</artifactId>
    <version>4.1.5</version>
</dependency>