Servlet.init() for servlet [springmvc] threw exception
手记一个学习springmvc遇到的HTTP Status 500 – Internal Server Error错误：Servlet.init() for servlet [springmvc] threw exception
错误完整log如下：
Type 异常报告
消息 Servlet.init() for servlet [springmvc] threw exception
描述 服务器遇到一个意外的情况，阻止它完成请求。
Exception javax.servlet.ServletException: Servlet.init() for servlet
[springmvc] threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol C o n n e c t i o n H a n d l e r . p r o c e s s ( A b s t r a c t P r o t o c o l . j a v a : 834 ) o r g . a p a c h e . t o m c a t . u t i l . n e t . N i o E n d p o i n t ConnectionHandler.process(AbstractProtocol.java:834) org.apache.tomcat.util.net.NioEndpoint ConnectionHandler.process(AbstractProtocol.java:834)org.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1415)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor W o r k e r . r u n ( U n k n o w n S o u r c e ) o r g . a p a c h e . t o m c a t . u t i l . t h r e a d s . T a s k T h r e a d Worker.run(Unknown Source) org.apache.tomcat.util.threads.TaskThread Worker.run(UnknownSource)org.apache.tomcat.util.threads.TaskThreadWrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)Root Cause
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name ‘userController’: Unsatisfied dependency
expressed through field ‘userService’; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type ‘service.UserService’ available: expected at
least 1 bean which qualifies as autowire candidate. Dependency
annotations:
{@org.springframework.beans.factory.annotation.Autowired(required=true)}
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor A u t o w i r e d F i e l d E l e m e n t . i n j e c t ( A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . j a v a : 586 ) 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 . a n n o t a t i o n . I n j e c t i o n M e t a d a t a . i n j e c t ( I n j e c t i o n M e t a d a t a . j a v a : 91 ) 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 . a n n o t a t i o n . A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . p o s t P r o c e s s P r o p e r t y V a l u e s ( A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . j a v a : 372 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . p o p u l a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 1344 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . d o C r e a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 582 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . c r e a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 502 ) 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 . l a m b d a AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) org.springframework.beans.factory.support.AbstractBeanFactory.lambda AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586)org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBean 0 ( A b s t r a c t B e a n F a c t o r y . j a v a : 312 ) 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 : 228 ) 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 : 310 ) 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 : 200 ) 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 : 758 ) 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 : 868 ) 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 : 549 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . 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 ( F r a m e w o r k S e r v l e t . j a v a : 676 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . c r e a t e W e b A p p l i c a t i o n C o n t e x t ( F r a m e w o r k S e r v l e t . j a v a : 642 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . c r e a t e W e b A p p l i c a t i o n C o n t e x t ( F r a m e w o r k S e r v l e t . j a v a : 690 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . 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 ( F r a m e w o r k S e r v l e t . j a v a : 558 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . i n i t S e r v l e t B e a n ( F r a m e w o r k S e r v l e t . j a v a : 499 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . H t t p S e r v l e t B e a n . i n i t ( H t t p S e r v l e t B e a n . j a v a : 172 ) j a v a x . s e r v l e t . G e n e r i c S e r v l e t . i n i t ( G e n e r i c S e r v l e t . j a v a : 158 ) o r g . a p a c h e . c a t a l i n a . a u t h e n t i c a t o r . A u t h e n t i c a t o r B a s e . i n v o k e ( A u t h e n t i c a t o r B a s e . j a v a : 490 ) o r g . a p a c h e . c a t a l i n a . v a l v e s . E r r o r R e p o r t V a l v e . i n v o k e ( E r r o r R e p o r t V a l v e . j a v a : 92 ) o r g . a p a c h e . c a t a l i n a . v a l v e s . A b s t r a c t A c c e s s L o g V a l v e . i n v o k e ( A b s t r a c t A c c e s s L o g V a l v e . j a v a : 668 ) o r g . a p a c h e . c a t a l i n a . c o n n e c t o r . C o y o t e A d a p t e r . s e r v i c e ( C o y o t e A d a p t e r . j a v a : 343 ) o r g . a p a c h e . c o y o t e . h t t p 11. H t t p 11 P r o c e s s o r . s e r v i c e ( H t t p 11 P r o c e s s o r . j a v a : 408 ) o r g . a p a c h e . c o y o t e . A b s t r a c t P r o c e s s o r L i g h t . p r o c e s s ( A b s t r a c t P r o c e s s o r L i g h t . j a v a : 66 ) o r g . a p a c h e . c o y o t e . A b s t r a c t P r o t o c o l 0(AbstractBeanFactory.java:312) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:642) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:690) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:558) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) org.apache.coyote.AbstractProtocol 0(AbstractBeanFactory.java:312)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676)org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:642)org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:690)org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:558)org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)org.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:834)
org.apache.tomcat.util.net.NioEndpoint S o c k e t P r o c e s s o r . d o R u n ( N i o E n d p o i n t . j a v a : 1415 ) o r g . a p a c h e . t o m c a t . u t i l . n e t . S o c k e t P r o c e s s o r B a s e . r u n ( S o c k e t P r o c e s s o r B a s e . j a v a : 49 ) 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 ( U n k n o w n S o u r c e ) 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 SocketProcessor.doRun(NioEndpoint.java:1415) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor SocketProcessor.doRun(NioEndpoint.java:1415)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.util.concurrent.ThreadPoolExecutor.runWorker(UnknownSource)java.util.concurrent.ThreadPoolExecutorWorker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)Root Cause
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type ‘service.UserService’ available: expected at
least 1 bean which qualifies as autowire candidate. Dependency
annotations:
{@org.springframework.beans.factory.annotation.Autowired(required=true)}
org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1504)
org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101)
org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062)
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor A u t o w i r e d F i e l d E l e m e n t . i n j e c t ( A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . j a v a : 583 ) 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 . a n n o t a t i o n . I n j e c t i o n M e t a d a t a . i n j e c t ( I n j e c t i o n M e t a d a t a . j a v a : 91 ) 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 . a n n o t a t i o n . A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . p o s t P r o c e s s P r o p e r t y V a l u e s ( A u t o w i r e d A n n o t a t i o n B e a n P o s t P r o c e s s o r . j a v a : 372 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . p o p u l a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 1344 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . d o C r e a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 582 ) 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 A u t o w i r e C a p a b l e B e a n F a c t o r y . c r e a t e B e a n ( A b s t r a c t A u t o w i r e C a p a b l e B e a n F a c t o r y . j a v a : 502 ) 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 . l a m b d a AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:583) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) org.springframework.beans.factory.support.AbstractBeanFactory.lambda AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:583)org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBean 0 ( A b s t r a c t B e a n F a c t o r y . j a v a : 312 ) 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 : 228 ) 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 : 310 ) 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 : 200 ) 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 : 758 ) 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 : 868 ) 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 : 549 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . 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 ( F r a m e w o r k S e r v l e t . j a v a : 676 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . c r e a t e W e b A p p l i c a t i o n C o n t e x t ( F r a m e w o r k S e r v l e t . j a v a : 642 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . c r e a t e W e b A p p l i c a t i o n C o n t e x t ( F r a m e w o r k S e r v l e t . j a v a : 690 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . 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 ( F r a m e w o r k S e r v l e t . j a v a : 558 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . F r a m e w o r k S e r v l e t . i n i t S e r v l e t B e a n ( F r a m e w o r k S e r v l e t . j a v a : 499 ) o r g . s p r i n g f r a m e w o r k . w e b . s e r v l e t . H t t p S e r v l e t B e a n . i n i t ( H t t p S e r v l e t B e a n . j a v a : 172 ) j a v a x . s e r v l e t . G e n e r i c S e r v l e t . i n i t ( G e n e r i c S e r v l e t . j a v a : 158 ) o r g . a p a c h e . c a t a l i n a . a u t h e n t i c a t o r . A u t h e n t i c a t o r B a s e . i n v o k e ( A u t h e n t i c a t o r B a s e . j a v a : 490 ) o r g . a p a c h e . c a t a l i n a . v a l v e s . E r r o r R e p o r t V a l v e . i n v o k e ( E r r o r R e p o r t V a l v e . j a v a : 92 ) o r g . a p a c h e . c a t a l i n a . v a l v e s . A b s t r a c t A c c e s s L o g V a l v e . i n v o k e ( A b s t r a c t A c c e s s L o g V a l v e . j a v a : 668 ) o r g . a p a c h e . c a t a l i n a . c o n n e c t o r . C o y o t e A d a p t e r . s e r v i c e ( C o y o t e A d a p t e r . j a v a : 343 ) o r g . a p a c h e . c o y o t e . h t t p 11. H t t p 11 P r o c e s s o r . s e r v i c e ( H t t p 11 P r o c e s s o r . j a v a : 408 ) o r g . a p a c h e . c o y o t e . A b s t r a c t P r o c e s s o r L i g h t . p r o c e s s ( A b s t r a c t P r o c e s s o r L i g h t . j a v a : 66 ) o r g . a p a c h e . c o y o t e . A b s t r a c t P r o t o c o l 0(AbstractBeanFactory.java:312) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:642) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:690) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:558) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) org.apache.coyote.AbstractProtocol 0(AbstractBeanFactory.java:312)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676)org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:642)org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:690)org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:558)org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)org.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:834)
org.apache.tomcat.util.net.NioEndpoint S o c k e t P r o c e s s o r . d o R u n ( N i o E n d p o i n t . j a v a : 1415 ) o r g . a p a c h e . t o m c a t . u t i l . n e t . S o c k e t P r o c e s s o r B a s e . r u n ( S o c k e t P r o c e s s o r B a s e . j a v a : 49 ) 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 ( U n k n o w n S o u r c e ) 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 SocketProcessor.doRun(NioEndpoint.java:1415) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor SocketProcessor.doRun(NioEndpoint.java:1415)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.util.concurrent.ThreadPoolExecutor.runWorker(UnknownSource)java.util.concurrent.ThreadPoolExecutorWorker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)Note 主要问题的全部 stack 信息可以在 server logs 里查看
其中，主要报错cause by 在这一行：
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userController’: Unsatisfied dependency expressed through field ‘userService’; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘service.UserService’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
多次检查后，发现原因是：配置文件springmvc-servlet.xml中，使用扫描机制扫描controller中的包名与项目中的包名不一致引起的。
即：
![Servlet.init() for servlet [springmvc] threw exception_第1张图片](http://img.e-com-net.com/image/info8/689a37394d30417ebc345e05eb059243.jpg)
在此之前，同样是这个原因引起的500报错，可是xml中的名字service与项目中的service包名一致，经过检查后发现是我之前刚建项目时将service包名写成了Service，然后运行项目之后又把Service改成了service，接下来的运行中就一直报controller控制器无法正常工作的500错误，最后把项目Clean一下，即清除掉原本的缓存重新运行即可正常运行
即，项目经过改动了java代码后，若是之前有过运行的话最好都进行clean一下项目重新加载，相关原因是：
eclipse为了提高效率，并不是每次启动项目都会检查插件，通过clean就是强制eclipse去检查已安装插件。
Eclipse加载项目是每次把新的改动添加到原来缓存（.java文件是通过编译成.class文件）上去的，是不会更改加载过的缓存文件，若是用旧的缓存（.java文件是通过编译成.class文件）运行新改动的文件就会报错了。
clean项目的方法：
Project->Clean…->然后选择你所要Clean的项目->OK