java小白日常报错
java小白日常報錯
CRM項目中使用逆向工程生成mappper.xml文件、pojo文件、和mapper文件時產生的錯誤*
作為一個java小白人，開始學習寫博客，一個是為了為了記筆記，另一個是為了讓更多小白解決錯誤，不喜勿噴
錯誤類型
啟動tomcat后，出現下邊錯誤：
Illegal access: this web application instance has been stopped already. Could not load .The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
然后就不停的彈出上邊這一句
再去查看上邊異常：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userController’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.powernode.setting.service.UserService com.powernode.setting.controller.UserController.userService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userServiceImpl’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.powernode.setting.mapper.TblUserMapper com.powernode.setting.service.impl.UserServiceImpl.tblUserMapper; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘tblUserMapper’ defined in file [D:\sh2020\four\class\spring-ssm\target\classes\com\powernode\setting\mapper\TblUserMapper.class]: Unsatisfied dependency expressed through bean property ‘sqlSessionFactory’: : Error creating bean with name ‘sqlSessionFactory’ defined in class path resource [spring/spring-tx.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: ‘file [D:\sh2020\four\class\spring-ssm\target\classes\mapper\TblUserMapper.xml]’; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘file [D:\sh2020\four\class\spring-ssm\target\classes\mapper\TblUserMapper.xml]’. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias ‘com.powernode.pojo.TblUser’. Cause: java.lang.ClassNotFoundException: Cannot find class: com.powernode.pojo.TblUser; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘sqlSessionFactory’ defined in class path resource [spring/spring-tx.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: ‘file [D:\sh2020\four\class\spring-ssm\target\classes\mapper\TblUserMapper.xml]’; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘file [D:\sh2020\four\class\spring-ssm\target\classes\mapper\TblUserMapper.xml]’. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias ‘com.powernode.pojo.TblUser’. Cause: java.lang.ClassNotFoundException: Cannot find class: com.powernode.pojo.TblUser
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory 1. g e t O b j e c t ( A b s t r a c t B e a n F a c t o r y . j a v a : 306 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . D e f a u l t S i n g l e t o n B e a n R e g i s t r y . g e t S i n g l e t o n ( D e f a u l t S i n g l e t o n B e a n R e g i s t r y . j a v a : 230 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . A b s t r a c t B e a n F a c t o r y . d o G e t B e a n ( A b s t r a c t B e a n F a c t o r y . j a v a : 302 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . A b s t r a c t B e a n F a c t o r y . g e t B e a n ( A b s t r a c t B e a n F a c t o r y . j a v a : 197 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . D e f a u l t L i s t a b l e B e a n F a c t o r y . p r e I n s t a n t i a t e S i n g l e t o n s ( D e f a u l t L i s t a b l e B e a n F a c t o r y . j a v a : 772 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . f i n i s h B e a n F a c t o r y I n i t i a l i z a t i o n ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 839 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . r e f r e s h ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 538 ) a t o r g . s p r i n g f r a m e w o r k . w e b . c o n t e x t . C o n t e x t L o a d e r . c o n f i g u r e A n d R e f r e s h W e b A p p l i c a t i o n C o n t e x t ( C o n t e x t L o a d e r . j a v a : 446 ) a t o r g . s p r i n g f r a m e w o r k . w e b . c o n t e x t . C o n t e x t L o a d e r . i n i t W e b A p p l i c a t i o n C o n t e x t ( C o n t e x t L o a d e r . j a v a : 328 ) a t o r g . s p r i n g f r a m e w o r k . w e b . c o n t e x t . C o n t e x t L o a d e r L i s t e n e r . c o n t e x t I n i t i a l i z e d ( C o n t e x t L o a d e r L i s t e n e r . j a v a : 107 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d C o n t e x t . l i s t e n e r S t a r t ( S t a n d a r d C o n t e x t . j a v a : 4939 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d C o n t e x t . s t a r t I n t e r n a l ( S t a n d a r d C o n t e x t . j a v a : 5434 ) a t o r g . a p a c h e . c a t a l i n a . u t i l . L i f e c y c l e B a s e . s t a r t ( L i f e c y c l e B a s e . j a v a : 150 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . C o n t a i n e r B a s e 1.getObject(AbstractBeanFactory.java:306) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase 1.getObject(AbstractBeanFactory.java:306)atorg.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)atorg.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)atorg.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)atorg.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)atorg.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)atorg.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)atorg.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)atorg.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)atorg.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)atorg.apache.catalina.core.ContainerBaseStartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase S t a r t C h i l d . c a l l ( C o n t a i n e r B a s e . j a v a : 1549 ) a t j a v a . u t i l . c o n c u r r e n t . F u t u r e T a s k . r u n ( F u t u r e T a s k . j a v a : 266 ) a t j a v a . u t i l . c o n c u r r e n t . T h r e a d P o o l E x e c u t o r . r u n W o r k e r ( T h r e a d P o o l E x e c u t o r . j a v a : 1142 ) a t j a v a . u t i l . c o n c u r r e n t . T h r e a d P o o l E x e c u t o r StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor StartChild.call(ContainerBase.java:1549)atjava.util.concurrent.FutureTask.run(FutureTask.java:266)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)atjava.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.C
lassNotFoundException: Cannot find class: com.powernode.pojo.TblUser
at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:200)
at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89)
at org.apache.ibatis.io.Resources.classForName(Resources.java:261)
at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:116)
… 69 more
主要是因為逆行工程插件生成文件路徑和自己的文件不匹配，因為我是粘貼過來的，后來檢查了pojo最上頭的路徑，mapper文件的路徑，mapper.xml的路徑，發現有一個***xml文件引用實體類路徑***錯了，而且xml文件中每一個sql語句都有配套路徑，所以使用逆向工程生成，或者是自己手寫的童鞋千萬要注意！！！
總結
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