SSM碰到org.springframework.beans.factory.UnsatisfiedDependencyException解决方法

错误信息

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'iUserService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'IUserServiceImpl': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ywj.ssm.mapper.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

解决误区

我刚碰到这个问题的时候根据错误信息我一直以为是我自己的注解或者是扫描路径有错误导致依赖关系没有成功找到所以导致的报错然后实际上并不是，所以我浪费了很多的时间

解决方法在web.xml种加上

 <!-- 读取Spring上下文的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener