Spring MVC @EnableWebMvc Bean配置

我正在尝试使用@Bean注释来配置一个在Spring MVC Controller应用程序中使用的Bean。Spring MVC @EnableWebMvc Bean配置

就我所知，@Bean注释等同于XML配置中的标记。什么我做的是以下几点：

类与配置

@Configuration 
public class ContextConfig { 
    @Bean 
    public MyBean myBean() { 
     return new MyBean(); 
    } 
}

但是，试图自动装配为myBean在MVC控制器失败的时候。

这个bean注入

@Controller 
public class HomeController { 

    @Autowired 
    private MyBean myBean; 

    @RequestMapping({"/", "/home"}) 
    public ModelAndView home (ModelAndView model) { 
     model.setViewName("home"); 
     return model; 
    } 
}

的错误是：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.validation.ValidatorFactory com.proeza.sgs.controller.HomeController.factory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.validation.ValidatorFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:744) 
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.validation.ValidatorFactory com.proeza.sgs.controller.HomeController.factory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.validation.ValidatorFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508) 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289) 
    ... 22 more 
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.validation.ValidatorFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1100) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:855) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480) 
    ... 24 more

最后评论

存在配置的其他豆类通过注释（@Bean），这是注入没有问题。

MyBean类没有实现也没有扩展任何东西。

<context-param> 
    <param-name>contextConfigLocation</param-name> 
    <param-value>com.myapp.config</param-value> 
</context-param>

的ContextConfig类是在包

任何想法，为什么会出现这种情况：

的配置位置在web.xml中

的conf声明？

来源

2014-12-28 Emiliano Schiano

你可以请你展示你的MyBean实现吗？它是否实现了一个接口并使用@Transactional注解？ – Nitek

感谢Ilya的回应。你是对的，我粘贴的堆栈不正确。原因在于，为了简化，我用MyBean举了一个例子，我忘了在堆栈中重命名它。

问题已解决。 MyBean的真名是MessageResolver，发生的事情是我已经在ContextConfig类中有另一个名为messageResolver的方法，用于为Thymeleaf创建一个bean。不同的是，我的不接收参数和另一组接受MessageSource的，但是...读春天docmentation我发现这一点：

春文件引用：

2.2.6。自定义bean命名

默认情况下，JavaConfig使用@Bean方法的名称作为生成bean的名称。但是，可以使用BeanNamingStrategy扩展点使用来覆盖此功能。

Spring @Bean doc

所以，问题是没有被创建的豆，因为它被overrided它的定义。错误消失只是重命名messageResolver方法。

再次感谢。问候！

来源

2014-12-28 13:41:00

该异常与MyBean类无关。例外情况如下：

No qualifying bean of type [javax.validation.ValidatorFactory] found for dependency

Spring未能将javax.validation.ValidatorFactory注入到HomeController类。检查ValidatorFactory类的配置。

来源

2014-12-28 04:53:56

Spring MVC @EnableWebMvc Bean配置

回答

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