一：springboot启动异常（Unsatisfied dependency expressed through field ‘baseMapper’; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘com.yanhua.mapper.TUserMapper’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}）
D:\localfile\jdk-8u172-windows-i586\bin\java.exe -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:56097,suspend=y,server=n -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -javaagent:C:\Users\Administrator\.IntelliJIdea2019.1\system\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "D:\localfile\jdk-8u172-windows-i586\jre\lib\charsets.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\deploy.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\access-bridge-32.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\access-bridge.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\cldrdata.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\dnsns.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\jaccess.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\jfxrt.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\localedata.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\nashorn.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\sunec.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\sunjce_provider.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\sunmscapi.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\sunpkcs11.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\ext\zipfs.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\javaws.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\jce.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\jfr.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\jfxswt.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\jsse.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\management-agent.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\plugin.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\resources.jar;D:\localfile\jdk-8u172-windows-i586\jre\lib\rt.jar;D:\ideaWork\distributed-lock-demo1\target\classes;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-web\2.1.6.RELEASE\spring-boot-starter-web-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter\2.1.6.RELEASE\spring-boot-starter-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot\2.1.6.RELEASE\spring-boot-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-logging\2.1.6.RELEASE\spring-boot-starter-logging-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;D:\localfile\apache-maven-3.5.4\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;D:\localfile\apache-maven-3.5.4\repository\org\apache\logging\log4j\log4j-to-slf4j\2.11.2\log4j-to-slf4j-2.11.2.jar;D:\localfile\apache-maven-3.5.4\repository\org\apache\logging\log4j\log4j-api\2.11.2\log4j-api-2.11.2.jar;D:\localfile\apache-maven-3.5.4\repository\org\slf4j\jul-to-slf4j\1.7.26\jul-to-slf4j-1.7.26.jar;D:\localfile\apache-maven-3.5.4\repository\javax\annotation\javax.annotation-api\1.3.2\javax.annotation-api-1.3.2.jar;D:\localfile\apache-maven-3.5.4\repository\org\yaml\snakeyaml\1.23\snakeyaml-1.23.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-json\2.1.6.RELEASE\spring-boot-starter-json-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\core\jackson-databind\2.9.9\jackson-databind-2.9.9.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\core\jackson-core\2.9.9\jackson-core-2.9.9.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.9.9\jackson-datatype-jdk8-2.9.9.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.9.9\jackson-datatype-jsr310-2.9.9.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.9.9\jackson-module-parameter-names-2.9.9.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-tomcat\2.1.6.RELEASE\spring-boot-starter-tomcat-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.21\tomcat-embed-core-9.0.21.jar;D:\localfile\apache-maven-3.5.4\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.21\tomcat-embed-el-9.0.21.jar;D:\localfile\apache-maven-3.5.4\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.21\tomcat-embed-websocket-9.0.21.jar;D:\localfile\apache-maven-3.5.4\repository\org\hibernate\validator\hibernate-validator\6.0.17.Final\hibernate-validator-6.0.17.Final.jar;D:\localfile\apache-maven-3.5.4\repository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;D:\localfile\apache-maven-3.5.4\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;D:\localfile\apache-maven-3.5.4\repository\com\fasterxml\classmate\1.4.0\classmate-1.4.0.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-web\5.1.8.RELEASE\spring-web-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-beans\5.1.8.RELEASE\spring-beans-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-webmvc\5.1.8.RELEASE\spring-webmvc-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-aop\5.1.8.RELEASE\spring-aop-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-context\5.1.8.RELEASE\spring-context-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-expression\5.1.8.RELEASE\spring-expression-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\projectlombok\lombok\1.18.8\lombok-1.18.8.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-core\5.1.8.RELEASE\spring-core-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-jcl\5.1.8.RELEASE\spring-jcl-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-data-redis\2.1.6.RELEASE\spring-boot-starter-data-redis-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\data\spring-data-redis\2.1.9.RELEASE\spring-data-redis-2.1.9.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\data\spring-data-keyvalue\2.1.9.RELEASE\spring-data-keyvalue-2.1.9.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\data\spring-data-commons\2.1.9.RELEASE\spring-data-commons-2.1.9.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-tx\5.1.8.RELEASE\spring-tx-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-oxm\5.1.8.RELEASE\spring-oxm-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-context-support\5.1.8.RELEASE\spring-context-support-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\io\lettuce\lettuce-core\5.1.7.RELEASE\lettuce-core-5.1.7.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-common\4.1.36.Final\netty-common-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-handler\4.1.36.Final\netty-handler-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-buffer\4.1.36.Final\netty-buffer-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-codec\4.1.36.Final\netty-codec-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-transport\4.1.36.Final\netty-transport-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\netty\netty-resolver\4.1.36.Final\netty-resolver-4.1.36.Final.jar;D:\localfile\apache-maven-3.5.4\repository\io\projectreactor\reactor-core\3.2.10.RELEASE\reactor-core-3.2.10.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\org\reactivestreams\reactive-streams\1.0.2\reactive-streams-1.0.2.jar;D:\localfile\apache-maven-3.5.4\repository\mysql\mysql-connector-java\8.0.16\mysql-connector-java-8.0.16.jar;D:\localfile\apache-maven-3.5.4\repository\com\alibaba\druid-spring-boot-starter\1.1.10\druid-spring-boot-starter-1.1.10.jar;D:\localfile\apache-maven-3.5.4\repository\com\alibaba\druid\1.1.10\druid-1.1.10.jar;D:\localfile\apache-maven-3.5.4\repository\org\slf4j\slf4j-api\1.7.26\slf4j-api-1.7.26.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-autoconfigure\2.1.6.RELEASE\spring-boot-autoconfigure-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus-boot-starter\3.1.0\mybatis-plus-boot-starter-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus\3.1.0\mybatis-plus-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\boot\spring-boot-starter-jdbc\2.1.6.RELEASE\spring-boot-starter-jdbc-2.1.6.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\com\zaxxer\HikariCP\3.2.0\HikariCP-3.2.0.jar;D:\localfile\apache-maven-3.5.4\repository\org\springframework\spring-jdbc\5.1.8.RELEASE\spring-jdbc-5.1.8.RELEASE.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus-generator\3.1.0\mybatis-plus-generator-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus-extension\3.1.0\mybatis-plus-extension-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus-core\3.1.0\mybatis-plus-core-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\baomidou\mybatis-plus-annotation\3.1.0\mybatis-plus-annotation-3.1.0.jar;D:\localfile\apache-maven-3.5.4\repository\org\mybatis\mybatis\3.5.0\mybatis-3.5.0.jar;D:\localfile\apache-maven-3.5.4\repository\com\github\jsqlparser\jsqlparser\1.4\jsqlparser-1.4.jar;D:\localfile\apache-maven-3.5.4\repository\org\mybatis\mybatis-spring\2.0.0\mybatis-spring-2.0.0.jar;D:\localfile\apache-maven-3.5.4\repository\org\freemarker\freemarker\2.3.28\freemarker-2.3.28.jar;D:\Program Files\JetBrains\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar" com.yanhua.DistributedLockDemo1Application
Connected to the target VM, address: '127.0.0.1:56097', transport: 'socket'. ____ _ __ _ _/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/ ___)| |_)| | | | | || (_| | ) ) ) )' |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot :: (v2.1.6.RELEASE)2020-07-23 10:07:01.141 INFO 5180 --- [ main] c.y.DistributedLockDemo1Application : Starting DistributedLockDemo1Application on WIN-3A7O8CVIB4J with PID 5180 (D:\ideaWork\distributed-lock-demo1\target\classes started by win-20190221 in D:\ideaWork\distributed-lock-demo1)
2020-07-23 10:07:01.144 INFO 5180 --- [ main] c.y.DistributedLockDemo1Application : No active profile set, falling back to default profiles: default
2020-07-23 10:07:01.945 WARN 5180 --- [ main] o.m.s.mapper.ClassPathMapperScanner : No MyBatis mapper was found in '[com.yanhua]' package. Please check your configuration.
2020-07-23 10:07:01.994 INFO 5180 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2020-07-23 10:07:01.996 INFO 5180 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2020-07-23 10:07:02.026 INFO 5180 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 8ms. Found 0 repository interfaces.
2020-07-23 10:07:02.371 INFO 5180 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$2e96de30] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-07-23 10:07:02.441 ERROR 5180 --- [ main] o.a.catalina.core.AprLifecycleListener : An incompatible version [1.2.8] of the APR based Apache Tomcat Native library is installed, while Tomcat requires version [1.2.14]
2020-07-23 10:07:02.581 ERROR 5180 --- [ main] o.a.catalina.core.AprLifecycleListener : An incompatible version [1.2.8] of the APR based Apache Tomcat Native library is installed, while Tomcat requires version [1.2.14]
2020-07-23 10:07:02.687 INFO 5180 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2020-07-23 10:07:02.700 ERROR 5180 --- [ main] o.a.catalina.core.AprLifecycleListener : An incompatible version [1.2.8] of the APR based Apache Tomcat Native library is installed, while Tomcat requires version [1.2.14]
2020-07-23 10:07:02.707 INFO 5180 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-07-23 10:07:02.707 INFO 5180 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.21]
2020-07-23 10:07:02.828 INFO 5180 --- [ main] o.a.c.c.C.[.[.[/distributedLockDemo1] : Initializing Spring embedded WebApplicationContext
2020-07-23 10:07:02.828 INFO 5180 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1638 ms
2020-07-23 10:07:02.928 WARN 5180 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'TUserServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.yanhua.mapper.TUserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2020-07-23 10:07:02.931 INFO 5180 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-07-23 10:07:02.948 INFO 5180 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-07-23 10:07:03.036 ERROR 5180 --- [ main] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'TUserServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.yanhua.mapper.TUserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]at com.yanhua.DistributedLockDemo1Application.main(DistributedLockDemo1Application.java:10) [classes/:na]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.yanhua.mapper.TUserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1658) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1217) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]... 19 common frames omittedDisconnected from the target VM, address: '127.0.0.1:56097', transport: 'socket'Process finished with exit code 1二：出现异常的原因并解决
①：是因为Mapper对应的接口所在的包没有被扫描到，在启动类上加上MapperScan注解
