创建在ServletContext资源中定义的名称为'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandl

本文介绍了创建在ServletContext资源中定义的名称为'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0'的bean时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

问题:

我正在为在类中执行方法创建切入点.该类是控制器类，由注解@Controller表示，因此对于方面所需要的相同，不需要bean. 我附上了Dispathcher Servlet代码，方面和控制器类.有人可以确定问题出在哪里.

I am creating a pointcut for execution of a method in a class . This class is a controller class and denoted by annotation @Controller and hence no bean is needed for the same which is required by the aspect. I am attaching the dispathcher servlet code , aspect and the controller class.Can somebody identify what the problem is.

DISPATCHER SERVLET:

DISPATCHER SERVLET :

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework/schema/beans" xmlns:xsi="www.w3/2001/XMLSchema-instance" xmlns:context="www.springframework/schema/context" xmlns:p="www.springframework/schema/p" xmlns:aop="www.springframework/schema/aop" xmlns:tx="www.springframework/schema/tx" xsi:schemaLocation="www.springframework/schema/beans www.springframework/schema/beans/spring-beans-3.0.xsd www.springframework/schema/context www.springframework/schema/context/spring-context-3.0.xsd www.springframework/schema/aop www.springframework/schema/aop/spring-aop-3.0.xsd www.springframework/schema/tx www.springframework/schema/tx/spring-tx-3.0.xsd"> <context:annotation-config /> <context:spring-configured /> <aop:aspectj-autoproxy /> <bean id="LoggerBean" class="com.persistent.eap.aop.LoggerAspect" /> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" > <property name="order" value="0" /> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <bean class="com.persistent.eap.validators.UserRegistrationValidator" /> <bean id="userRegistrationService" class="com.persistent.eap.service.impl.UserRegistrationServiceImpl" /> <bean id="userOperationsService" class="com.persistent.eap.service.impl.UserOperationsServiceImpl" /> <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basename" value="messages"/> </bean> <bean id="tilesViewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView"/> </bean> <bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer" p:definitions="/WEB-INF/tiles-defs.xml" /> <context:component-scan base-package="com.persistent.eap.controllers" /> <context:component-scan base-package="com.persistent.eap.service" /> <context:component-scan base-package="com.persistent.eap.dao" /> <import resource="databaseContext.xml"/> <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping" > <property name="order" value="1" /> <property name="mappings"> <value> /*.htm=urlController </value> </property> </bean> <bean id="urlController" class="org.springframework.web.servlet.mvc.UrlFilenameViewController" /> </beans>

方面:

ASPECT :

package com.persistent.eap.aop; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Pointcut; //import org.aspectj.lang.annotation.Before; @Aspect public class LoggerAspect { @Pointcut("execution(* com.persistent.eap.controllers.UserRegistrationController.setUpForm(..))") public void controllerMethods(){} @Around("controllerMethods()") public Object controllerMethodCall(ProceedingJoinPoint call) throws Throwable{ System.out.println("[LOGGING INFO : Entering Method "+call.toShortString()+" ]"); Object point=call.proceed(); System.out.println("[LOGGING INFO : Exiting Method "+call.toShortString()+" with return as "+point+" ]"); return point; } }

控制器类:

package com.persistent.eap.controllers; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import com.persistent.eap.domain.UserDetails; import com.persistent.eap.service.intfc.UserRegistrationService; import com.persistent.eap.validators.UserRegistrationValidator; @Controller @RequestMapping("/userRegistrationForm.htm") public class UserRegistrationController { private UserRegistrationService userRegistrationService; private UserRegistrationValidator userRegistrationValidator; @Autowired public UserRegistrationController(UserRegistrationService userRegistrationService ,UserRegistrationValidator userRegistrationValidator) { this.userRegistrationService = userRegistrationService; this.userRegistrationValidator = userRegistrationValidator; } @RequestMapping(method=RequestMethod.GET) public String setUpForm(ModelMap model){ UserDetails userDetails = new UserDetails(); model.addAttribute("userDetails", userDetails); return "userRegistrationForm"; } @RequestMapping(method=RequestMethod.POST) public String onSubmit(@ModelAttribute("userDetails") UserDetails userDetails,BindingResult result){ userRegistrationValidator.validate(userDetails, result); if(result.hasErrors()){ return "userRegistrationForm"; } else{ System.out.println(userDetails.getId()+" "+userDetails.getUsername()); userRegistrationService.registerUserDetails(userDetails); return "userRegistrationSuccess"; } } }

控制台错误:

SEVERE: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRegistrationController' defined in file [C:\Documents and Settings\samiksha_kalra\Desktop\VMforce\EclipseWorkspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\EAPProject\WEB-INF\classes\com\persistent\eap\controllers\UserRegistrationController.class]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.persistent.eap.controllers.UserRegistrationController]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRegistrationController' defined in file [C:\Documents and Settings\samiksha_kalra\Desktop\VMforce\EclipseWorkspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\EAPProject\WEB-INF\classes\com\persistent\eap\controllers\UserRegistrationController.class]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.persistent.eap.controllers.UserRegistrationController]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075) at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:383) at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:362) at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.detectHandlers(AbstractDetectingUrlHandlerMapping.java:82) at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.initApplicationContext(AbstractDetectingUrlHandlerMapping.java:58) at org.springframework.context.support.ApplicationObjectSupport.initApplicationContext(ApplicationObjectSupport.java:119) at org.springframework.web.context.support.WebApplicationObjectSupport.initApplicationContext(WebApplicationObjectSupport.java:72) at org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:73) at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:106) at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:85) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1413) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) ... 31 more Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.persistent.eap.controllers.UserRegistrationController]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:212) at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:112) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:476) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:362) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:322) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:407) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1426) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) ... 49 more Caused by: java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given at net.sf.cglib.proxy.Enhancer.emitConstructors(Enhancer.java:718) at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:499) at net.sf.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33) at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216) at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377) at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285) at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:200) ... 56 more Dec 20, 2010 6:28:42 PM org.apache.catalina.core.StandardContext loadOnStartup SEVERE: Servlet /EAPProject threw load() exception java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given at net.sf.cglib.proxy.Enhancer.emitConstructors(Enhancer.java:718) at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:499) at net.sf.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33) at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216) at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377) at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285) at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:200) at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:112) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:476) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:362) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:322) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:407) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1426) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075) at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:383) at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:362) at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.detectHandlers(AbstractDetectingUrlHandlerMapping.java:82) at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.initApplicationContext(AbstractDetectingUrlHandlerMapping.java:58) at org.springframework.context.support.ApplicationObjectSupport.initApplicationContext(ApplicationObjectSupport.java:119) at org.springframework.web.context.support.WebApplicationObjectSupport.initApplicationContext(WebApplicationObjectSupport.java:72) at org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:73) at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:106) at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:85) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1413) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4659) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

推荐答案

这是Spring AOP中的限制.当您使用AspectJ切入点将方面编织到Bean中时，Spring将使用CGLIB生成目标的子类，并从该子类中调用方面.

This is a limitation in Spring AOP. When you use AspectJ pointcuts to weave aspects into beans, Spring will use CGLIB to generate a subclass of the target, and invoke the aspects from that subclass.

但是，如果目标类没有公共的默认构造函数，则此操作将失败. CGLIB确实具有处理此问题的能力，但这全部隐藏在Spring AOP的内容之后，您无法更改其行为.

If the target class does not have a public default constructor, however, this will fail. CGLIB does have the ability to handle this, but this is all hidden behind the Spring AOP stuff and you can't change that behaviour.

我只能建议您回到对控制器使用setter注入，而不是对构造函数注入.我知道这并不理想，但我想不出其他解决方法.

I can only suggest that you go back to using setter injection for your controller, rather than constructor injection. It's not ideal, I know, but I can't think of any other workaround.