java - 扩展抽象类时出现 Spring BeanDefinitionStoreException

Question

我创建了一个扩展抽象类 AbstractScheduledService 的类.

@Service
public class MyClass extends AbstractScheduledService {

    public MyClass(){
        super();
        ...
    }
}

我向我的 pom 文件添加了所需的依赖项:

    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>17.0</version>
    </dependency>

当运行我的应用程序时出现以下异常，实在不知道为什么。我可以在该项目的maven依赖的相关jar下看到AbstractScheduledService.class文件。

如何修复它？

11 Aug 2014 10:17:33 ERROR ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to load bean class: com.company.app.MyClass; nested exception is java.io.FileNotFoundException: class path resource [com/google/common/util/concurrent/AbstractScheduledService.class] cannot be opened because it does not exist
        at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:162)
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:299)
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243)
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:254)
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:94)
        at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:609)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
        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.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:775)
        at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:424)
        at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:767)
        at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:249)
        at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:710)
        at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:492)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
        at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:39)
        at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:186)
        at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:494)
        at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:141)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:145)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:56)
        at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:609)
        at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:540)
        at org.eclipse.jetty.util.Scanner.scan(Scanner.java:403)
        at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:337)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:121)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
        at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:555)
        at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:230)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
        at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:81)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58)
        at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:96)
        at org.eclipse.jetty.server.Server.doStart(Server.java:280)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
        at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1259)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1182)
Caused by: java.io.FileNotFoundException: class path resource [com/google/common/util/concurrent/AbstractScheduledService.class] cannot be opened because it does not exist
        at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172)
        at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:50)
        at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:82)
        at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:102)
        at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:77)
        at org.springframework.context.annotation.ConfigurationClassParser.asSourceClass(ConfigurationClassParser.java:563)
        at org.springframework.context.annotation.ConfigurationClassParser$SourceClass.getSuperClass(ConfigurationClassParser.java:726)
        at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:287)
        at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:218)
        at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:176)
        at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:158)
        ... 41 more

Answer 1

在问题注释之后，在具有 guava 9.0 链接的依赖项中，键入以下内容:

<dependency>
  <groupId>some_group</groupId>
  <artifactId>some_artifact</artifactId>
  <version>some_version</version>
  <exclusions>
    <exclusion>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>com.google.guava</groupId>
  <artifactId>guava</artifactId>
  <version>17.0</version>
</dependency>

这将强制使用 guava 的库使用您的版本(在本例中为 17.0)。但要小心，因为 Guava 经常出于各种原因弃用其功能，最值得注意的是，它们重命名了很多。因此，您最终可能会在使用 guava 的库的代码中出现错误，因为该库无法找到适当的类或方法。