Spring Cloud项目中如何解决UnsatisfiedDependencyException错误？

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启动应用程序时发生错误。要查看条件报告，请以启用调试模式重新运行您的应用程序。错误信息如下：

错误：启动应用程序失败。请检查日志以获取更多详细信息。

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-11-14 00:38:14.164 ERROR 1022 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'paymentController': Unsatisfied dependency expressed through field 'paymentService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'paymentServiceImpl': Unsatisfied dependency expressed through field 'paymentDao'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'paymentDao' defined in file [/Users/caoliu/Idea-workspace/springcloud/springcloud-privoder-payment-8001/target/classes/org/fecker/springcloud/dao/PaymentDao.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 [/Users/caoliu/Idea-workspace/springcloud/springcloud-privoder-payment-8001/target/classes/mybatis/mybatis-config.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.NullPointerException
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXXXXX': Unsatisfied dependency expressed through

我的报错是因为application.yml文件里mapper-locations配置报错

错误：

#1.配置mapper文件放在resource下的mapper中
mapper-locations: classpath:mybatis/*.xml

正确：

#1.配置mapper文件放在resource下的mapper中
mapper-locations: classpath:mybatis/mapper.xml

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