Spring Boot MyBatis: UnsatisfiedDependencyException: Error Creating Bean 'rootController' - 解决方法

Spring Boot MyBatis: UnsatisfiedDependencyException: Error Creating Bean 'rootController' - 解决方法

本文提供了解决 Spring Boot MyBatis 中'rootController' 无法创建的错误，并详细分析了'UnsatisfiedDependencyException' 异常的原因以及修复方法。

错误信息：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rootController': Unsatisfied dependency expressed through field 'rootInfoService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rootInfoService': Unsatisfied dependency expressed through field 'rootInfoMapper'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rootInfoMapper' defined in file [E:\JavaWorkspace\MyBatis\olderhouse\target\classes\com\softeem\mapper\RootInfoMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [E:\JavaWorkspace\MyBatis\olderhouse\target\classes\mapper\HealthRecordsMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file [E:\JavaWorkspace\MyBatis\olderhouse\target\classes\mapper\HealthRecordsMapper.xml]'. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.sm.graduation.health.pojo.HealthRecords'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.sm.graduation.health.pojo.HealthRecords

错误原因：

这个错误产生的原因是无法创建一个名为'rootController'的bean，因为它对'rootInfoService'有一个未满足的依赖项，而'rootInfoService'又对'rootInfoMapper'有一个未满足的依赖项。最终，'rootInfoMapper'无法创建，因为它的'sqlSessionFactory'属性也无法满足依赖项。

根据错误信息，问题出在解析'mapper/HealthRecordsMapper.xml'文件时，它无法解析出'com.sm.graduation.health.pojo.HealthRecords'类，因为该类未被正确引入或找到。

解决方法：

要修复这个问题，你需要检查以下几点：

1. 检查'mapper/HealthRecordsMapper.xml'文件是否正确引入了'com.sm.graduation.health.pojo.HealthRecords'类，如果没有，请确保该类已经被正确引入。

2. 检查该类是否在正确的包路径下，如果不是，请将其移动到正确的位置。

3. 检查类名是否正确拼写，如果不是，则将其更正为正确的拼写。

4. 重启应用程序并重新尝试运行，如果问题仍然存在，请检查其他依赖项是否正确配置。

总结：

这个错误通常是由类路径问题或 Mapper XML 文件引用错误导致的。通过仔细检查以上步骤，你应该能够解决'rootController'无法创建的错误。