Unsatisfied dependency expressed through field 'xxxService'

在使用springboot创建新项目后，在启动服务之后报如下错误：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userFaceController': Unsatisfied dependency expressed through field 'tUserFaceAccessTokenService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'TUserFaceAccessTokenService': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'TUserFaceAccessTokenMapper' defined in file [E:\code\java\company\java\risk-control-call-api\target\classes\com\yctimes\mapper\TUserFaceAccessTokenMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:659) ~[spring-beans-5.3.12.jar:5.3.12]

at 

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'TUserFaceAccessTokenService': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'TUserFaceAccessTokenMapper' defined in file [E:\code\java\company\java\risk-control-call-api\target\classes\com\yctimes\mapper\TUserFaceAccessTokenMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:659) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:639) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.12.jar:5.3.12]

... 20 common frames omitted

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'TUserFaceAccessTokenMapper' defined in file [E:\code\java\company\java\risk-control-call-api\target\classes\com\yctimes\mapper\TUserFaceAccessTokenMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.12.jar:5.3.12] org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.12.jar:5.3.12]

... 34 common frames omitted

Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

at org.springframework.util.Assert.notNull(Assert.java:201) ~[spring-core-5.3.12.jar:5.3.12]

at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:74) ~[mybatis-spring-1.3.1.jar:1.3.1]

at tk.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:76) ~[mapper-spring-1.0.1.jar:na]

at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.12.jar:5.3.12]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.12.jar:5.3.12]

... 44 common frames omitted

Disconnected from the target VM, address: '127.0.0.1:58647', transport: 'socket'

解决办法：

1. 检查启动类是否加上如下注解：

• @MapperScan(basePackages = {"com.xx.xx.mapper"}, markerInterface = BaseMapper.class)
  @ComponentScan(basePackages = {"com.xx.xx"})
  @SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})

2. 检查service的实现类上是否加上了注解 @Service

3. 检查mapper接口类上面是否加了注解：@Mapper

4. 检查pom.xml文件是否有添加了mybatis相关的依赖包，要注意版本兼容问题，同时在pom.xml文件的<build></build>添加如下配置，来保证文件都能正常被扫描到并且加载成功：

<resources>
    <resource>
        <directory>src/main/resources</directory>
        <includes>
            <include>**/*.properties</include>
            <include>**/*.xml</include>
            <include>**/*.json</include>
        </includes>
        <filtering>true</filtering>
    </resource>
</resources>

5. 检查application.properties文件中是否配置了数据库的相关连接信息以及mybatis相关的配置

mybatis.type-aliases-package=com.xx.xx.entity.**
mybatis.mapper-locations=classpath:mapper/*.xml
#mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

如果以上几个步奏都没法解决重启报这个错误的话，那一定是jar包的版本有问题，可以试着降低版本，然后重新加载maven依赖，编译之后重新在试试。