required a single bean, but 2 were found Field roleService in com.lwluo.exam.framework.web.service.web.SysPermissionService required a single bean, but 2 were found: 启动报错 说 需要一个 bean,但找到了 2 个 ,但是我这里只有一个接口和一个实体类 解决 @MapperScan 扫描范围过大 指定要扫描的包 记录一下