SpringBoot整合Mybatis出现的错误

代码错误如下：

java.lang.IllegalArgumentException: At least one base package must be specifiedat org.springframework.util.Assert.notEmpty(Assert.java:228) ~[spring-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:269) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.mybatis.spring.mapper.ClassPathMapperScanner.doScan(ClassPathMapperScanner.java:164) ~[mybatis-spring-1.3.0.jar:1.3.0]at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$AutoConfiguredMapperScannerRegistrar.registerBeanDefinitions(MybatisAutoConfiguration.java:177) ~[mybatis-spring-boot-autoconfigure-1.1.1.jar:1.1.1]at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:352) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:143) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:116) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:320) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:686) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:524) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at SpringBootApplication.main(SpringBootApplication.java:11) [classes/:na]2017-12-13 22:36:35.606  INFO 4588 --- [           main] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2bbaf4f0: startup date [Wed Dec 13 22:36:32 CST 2017]; root of context hierarchy2017-12-13 22:36:35.609  WARN 4588 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception thrown from LifecycleProcessor on context closejava.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2bbaf4f0: startup date [Wed Dec 13 22:36:32 CST 2017]; root of context hierarchyat org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:417) [spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1002) [spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:961) [spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:794) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]at SpringBootApplication.main(SpringBootApplication.java:11) [classes/:na]2017-12-13 22:36:35.610 ERROR 4588 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Destroy method on bean with name 'org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory' threw an exceptionjava.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2bbaf4f0: startup date [Wed Dec 13 22:36:32 CST 2017]; root of context hierarchyat org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:404) [spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.context.support.ApplicationListenerDetector.postProcessBeforeDestruction(ApplicationListenerDetector.java:97) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:253) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]

错误原因：没有在主函数的类中对Mapper层进行扫描。

解决：加上对mapper层的扫描MapperScan

@ComponentScan(basePackages = { "cn.iponkan.controller"})@MapperScan(basePackages = {"cn.iponkan.mapper"})@EnableAutoConfigurationpublic class SpringBootApplication {    public static void main(String[] args){        SpringApplication.run(SpringBootApplication.class,args);    }}