Spring MVC:使用component-scan和Hibernate设置注释驱动的URL

时间:2012-08-23 15:14:45

标签: spring spring-mvc

我是Spring的新手。我尝试创建的是带有

的Spring MVC webapp
  1. 注释驱动的网址
  2. 休眠
  3. 似乎是冲突。

    我发现在Spring 3.0中设置注释驱动的URL的唯一方法是使用带有config的调度程序,如下所示:

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    
    <context:component-scan base-package="app.controllers" />
    
    <mvc:annotation-driven />
    
    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp/"
          p:suffix=".jsp" />
    </beans>
    

    这必须使用component-scan。正确的吗?

    问题是:要使用带注释的类,我还必须通过applicationContext.xml

    在我的<context:component-scan base-package="app.data.*" />中加载它们

    (我无法通过applicationContext.xml将所有内容正确地包含在<bean class="…" />中。这可能不应该是可行的方法。)

    只要我在两个地方都有component-scan来使我的网址正常工作(而不仅仅是applicationContext.xml),我就会收到此错误:

    Context initialization failed
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'itemsController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private app.data.service.ItemService app.controllers.ItemsController.itemService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [app.data.service.ItemService] 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:288)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4723)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5226)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5221)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private app.data.service.ItemService app.controllers.ItemsController.itemService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [app.data.service.ItemService] 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$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
        ... 21 more
    Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [app.data.service.ItemService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:924)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:793)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
        ... 23 more
    

    也许这个双component-scan不好?如果是的话,你能告诉我如何解决它吗? 还是别的什么?

    这是我的applicationContext.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="
          http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
          http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
    
    
        <context:component-scan base-package="app.*" />
    
       <!-- Needed for Autowiring -->
       <context:annotation-config />
    
       <!-- MySQL DataSource -->
       <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
          <property name="driverClass" value="com.mysql.jdbc.Driver" />
          <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test" />
          <property name="user" value="user" />
          <property name="password" value="pw" />
       </bean>
    
       <!-- Hibernate SessionFactory -->
        <bean id="sessionFactory" class="org.springframework.orm.hibernate4.AnnotationSessionFactoryBean">
          <property name="dataSource" ref="dataSource" />
          <property name="hibernateProperties">
             <value>
                hibernate.hbm2ddl.auto=update
                hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
             </value>
          </property>
       </bean>
    
    
    
       <!-- Transaction Management -->
       <tx:annotation-driven transaction-manager="txManager"/>
       <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
          <property name="sessionFactory" ref="sessionFactory" />
       </bean>
    </beans>
    

    提前感谢您的帮助! (我希望这些信息足够了。)

    [编辑]

    这就是我web.xml的样子:

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    
        <display-name>Spring Plus Hibernate 4</display-name>
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/applicationContext.xml</param-value>
        </context-param>
    
        <listener>
                <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    
        <servlet>
                <servlet-name>new-dispatcher</servlet-name>
                <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
                <load-on-startup>1</load-on-startup>
        </servlet>
    
        <servlet-mapping>
                <servlet-name>new-dispatcher</servlet-name>
                <url-pattern>*.html</url-pattern>
        </servlet-mapping>
    
        <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>/WEB-INF/new-dispatcher-servlet.xml</param-value>
        </context-param>
    
    
    
        <!-- Static files
        http://stackoverflow.com/questions/4169266/where-to-place-images-css-in-spring-mvc-app -->
        <servlet-mapping>
            <servlet-name>default</servlet-name>
            <url-pattern>*.css</url-pattern>
            <url-pattern>*.js</url-pattern>
            <url-pattern>*.png</url-pattern>
            <url-pattern>*.gif</url-pattern>
            <url-pattern>*.jpg</url-pattern>
            <url-pattern>*.jpeg</url-pattern>
        </servlet-mapping>
    </web-app>
    

    [编辑2] 编辑了像@jelies提议的web.xml,现在我得到了这个堆栈跟踪:

    Context initialization failed
    org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:412)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
        at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
        at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4723)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5226)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5221)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2820)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1150)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
        at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser$AopAutoProxyConfigurer.configureAutoProxyCreator(AnnotationDrivenBeanDefinitionParser.java:118)
        at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parse(AnnotationDrivenBeanDefinitionParser.java:79)
        at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1338)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1328)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
        ... 21 more
    Caused by: java.lang.ClassNotFoundException: org.aopalliance.intercept.MethodInterceptor
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
        ... 38 more
    24.08.2012 10:09:17 org.apache.catalina.core.StandardContext startInternal
    SCHWERWIEGEND: Error listenerStart
    24.08.2012 10:09:17 org.apache.catalina.core.StandardContext startInternal
    SCHWERWIEGEND: Context [/spring_hibernate4_demo] startup failed due to previous errors
    24.08.2012 10:09:17 org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["http-bio-8084"]
    24.08.2012 10:09:17 org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["ajp-bio-8009"]
    24.08.2012 10:09:17 org.apache.catalina.startup.Catalina start
    INFO: Server startup in 7923 ms
    24.08.2012 10:09:17 org.apache.catalina.util.LifecycleBase stop
    INFO: The stop() method was called on component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/spring_hibernate4_demo]] after stop() had already been called. The second call will be ignored.
    24.08.2012 10:09:18 org.springframework.web.context.ContextLoader initWebApplicationContext
    INFO: Root WebApplicationContext: initialization started
    24.08.2012 10:09:18 org.springframework.context.support.AbstractApplicationContext prepareRefresh
    INFO: Refreshing Root WebApplicationContext: startup date [Fri Aug 24 10:09:18 CEST 2012]; root of context hierarchy
    24.08.2012 10:09:18 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/applicationContext.xml]
    24.08.2012 10:09:18 org.springframework.web.context.ContextLoader initWebApplicationContext
    SCHWERWIEGEND: Context initialization failed
    org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:412)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
        at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
        at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4723)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5226)
        at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5221)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2820)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1150)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
        at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser$AopAutoProxyConfigurer.configureAutoProxyCreator(AnnotationDrivenBeanDefinitionParser.java:118)
        at org.springframework.transaction.config.AnnotationDrivenBeanDefinitionParser.parse(AnnotationDrivenBeanDefinitionParser.java:79)
        at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1338)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1328)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
        ... 21 more
    

1 个答案:

答案 0 :(得分:0)

applicationContext.xml

中尝试使用此功能
<context:component-scan base-package="app" />

而不是:

<context:component-scan base-package="app.*" />

使用第一个,您还将包含嵌套包。

参考here

编辑(已添加web.xml):

<context-param/> <param-name>contextConfigLocation</param-name>与{Spring}配置文件的路径不同,重复两次。尝试将第二个放在new-dispatcher servlet中作为init-param

<servlet>
    <servlet-name>new-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/new-dispatcher-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

希望它有效!