Error creating bean with name xxx Factory method ‘sqlSessionFactory‘ threw exception； nested excepti

Posted 2022-06-22 抓手

异常日志：

 Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxx': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxx': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'payRequestServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'payRequestMapper' defined in file [E:\\code\\xxx\\xxx\\target\\classes\\orm\\mapper\\XxxMapper.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 [com/baomidou/mybatisplus/autoconfigure/MybatisPlusAutoConfiguration.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.apache.ibatis.type.TypeException: The alias 'Entity' is already mapped to the value 'com.xxx.Entity'.
 

原因是MybatisPlus的typeAliasesPackage实体扫描包配置的范围太大了，导致spring容器启动时注入两个相同名称的Bean报错。

解决办法：

将.yml配置文件中的mybatis-plus.typeAliasesPackage的范围缩小，例如：mybatis-plus.typeAliasesPackage = com.**.**.po

其他方法，也可以将相同名称的Bean修改其中一个名字，这样启动就不报错了。不过这种方式治标不治本。