springboot 使用mapper注解注入失败 ，mapperHelper 无法注入

今天springboot 出现个错误找了好久错误原因。

错误信息：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService': Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userMapper': Error creating bean with name 'userMapper' defined in file [E:\jeefee\target\classes\com\jeefee\dao\mapper\UserMapper.class]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'mapperHelper' of bean class [org.mybatis.spring.mapper.MapperFactoryBean]: Bean property 'mapperHelper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [E:\jeefee\target\classes\com\jeefee\dao\mapper\UserMapper.class]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'mapperHelper' of bean class [org.mybatis.spring.mapper.MapperFactoryBean]: Bean property 'mapperHelper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userMapper': Error creating bean with name 'userMapper' defined in file [E:\jeefee\target\classes\com\jeefee\dao\mapper\UserMapper.class]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'mapperHelper' of bean class [org.mybatis.spring.mapper.MapperFactoryBean]: Bean property 'mapperHelper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [E:\jeefee\target\classes\com\jeefee\dao\mapper\UserMapper.class]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'mapperHelper' of bean class [org.mybatis.spring.mapper.MapperFactoryBean]: Bean property 'mapperHelper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

原因：是因为使用通用mapper的时候不能使用

    org.springframework.boot
    spring-boot-devtools
    true
    

    热部署。