【異常總結】mapper.xml文件parameterType值導致的服務啓動失敗

錯誤日誌：

2018-10-24 15:09:25.796 ERROR [main] o.s.boot.SpringApplication:845- Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with 
name 'faceLibraryMapperManager': Unsatisfied dependency expressed through field 'mapper'; 
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating 
bean with name 'faceLibraryMapper' defined in URL [jar:file:/opt/GA_II/vdp-face/vdp-face.ja
r!/BOOT-INF/classes!/com/unisinsight/vdp/face/mapper/FaceLibraryMapper.class]: Cannot resolve 
reference to bean 'sqlSessionFactoryBean' while setting bean property 'sqlSessionFactory'; 
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating 
bean with name 'sqlSessionFactoryBean' defined in class path resource
[com/unisinsight/vdp/face/common/config/MybatisConfigurer.class]: Bean instantiation via 
factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 
'sqlSessionFactoryBean' threw exception; nested exception is org.springframework.core.
NestedIOException: Failed to parse mapping resource: 'class path resource [mybatis/FaceLibraryMapper.xml]'; 
nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. 
The XML location is 'class path resource [mybatis/FaceLibraryMapper.xml]'. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache
.ibatis.type.TypeException: Could not resolve type alias 'FaceLibrary'.  Cause: java.lang.
ClassNotFoundException: Cannot find class: FaceLibrary
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1341)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:572)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:759)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:330)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246)
        at com.unisinsight.vdp.face.Application.main(Application.java:10)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
        at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
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重要的報錯信息是最後一句：

Error parsing Mapper XML. The XML location is 'class path resource [mybatis/FaceLibraryMapper.xml]'. 
Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache
.ibatis.type.TypeException: Could not resolve type alias 'FaceLibrary'.  Cause: java.lang
.ClassNotFoundException: Cannot find class: FaceLibrary

日誌表示解析FaceLibraryMapper.xml失敗了，原因是沒有找到FaceLibrary這個類。

而導致這個異常的原因竟然是因爲我在xml文件裏面定義的parameterType=“FaceLibrary”！
在使用idea啓動服務的時候，並沒有出現啓動異常，而在linux上用打包好的jar包啓動卻拋出了這個異常。最後我添加了FaceLibrary的類路徑才解決這個問題，即parameterType=“com.unisinsight.vdp.face.model.FaceLibrary”