解决：Injection of autowired dependencies failed报错问题

解决如下报错：

Error creating bean with name ‘categoryManageController’: Injection of
autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: private com.juhuasuan.service.IUserService
com.juhuasuan.controller.backend.CategoryManageController.iUserService;
nested exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name ‘iUserService’: Injection of autowired
dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: private com.juhuasuan.dao.UserMapper
com.juhuasuan.service.Impl.UserServiceImpl.userMapper; nested
exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name ‘userMapper’ defined in file
[E:\neusoft\java\maven\maven_code\juhuasuan\target\classes\com\juhuasuan\dao\UserMapper.class]:
Unsatisfied dependency expressed through bean property
‘sqlSessionFactory’: : Error creating bean with name
‘sqlSessionFactory’ defined in class path resource
[applicationContext-datasource.xml]: Invocation of init method failed;
nested exception is org.springframework.core.NestedIOException: Failed
to parse mapping resource: ‘file
[E:\neusoft\java\maven\maven_code\juhuasuan\target\classes\mappers\CartMapper.xml]’;
nested exception is org.apache.ibatis.builder.BuilderException: Error
parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException:
Error resolving class. Cause: org.apache.ibatis.type.TypeException:
Could not resolve type alias ‘BaseResultMap’. Cause:
java.lang.ClassNotFoundException: Cannot find class: BaseResultMap;
nested exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name ‘sqlSessionFactory’ defined in class path
resource [applicationContext-datasource.xml]: Invocation of init
method failed; nested exception is
org.springframework.core.NestedIOException:

解决：Injection of autowired dependencies failed报错问题
遇到情况如下：
1.相关的bean已注册
2.所有的注解（@Controller,@Service,@Autowired）该加的地方都加上了
3.问题：自动装配的依赖注入失败，Injection of autowired dependencies failed

报错信息中的关键问题：（看报错信息要看全，要看到最后）
下面就是我在一堆报错信息中找到的核心问题：

[E:\neusoft\java\maven\maven_code\juhuasuan\target\classes\mappers\CartMapper.xml]’;
Could not resolve type alias ‘BaseResultMap’. Cause:
java.lang.ClassNotFoundException: Cannot find class: BaseResultMap;

分析：在CartMapping.xml文件中无法解析别名为BaseResultMap，并且找不到该类，也就是说写了该类的地方出错，这里我是将结果集中resultMap写成resultType

错误的写法：
解决：Injection of autowired dependencies failed报错问题
正确的写法：由于该方法返回结果集的是map，所以用的是resultMap

最后说说我对这个报错的理解：
自动装配的依赖注入失败
我是这样理解的，首先service依赖注入的是mapper文件，mapper文件的注解是@Autowired,所以mapper出错时，Autowired这个注解自然就不能自动装配到mapper文件中，所以就会出现报错Injection of autowired dependencies failed

解决：Injection of autowired dependencies failed报错问题

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