org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'blotController': Unsatisfied dependency expressed through field 'blotService';
@SpringBootApplication
@MapperScan("com.gaotiew.springboot.mapper")
这个原因是因为类没有注入进去，可以在启动类上面加个全盘扫描或者你指定扫描其下的任何包–>@ComponentScan（“”）里面写扫描路径
