Question

我使用maven来管理我的Web项目依赖项。我将apache poi依赖项添加到我的pom文件中。它在编译时不显示错误。但是当它运行时，它会在我的MainApplication（）类中抛出RuntimeException。虽然它给出了java.lang.NoClassDefFoundError：org / apache / poi / ss / usermodel / Workbook

我有一个MainApplication类。

public class MainApplication extends Application {
private Set<Class<?>> classes = new HashSet<Class<?>>();
HashSet<Object> singletons = new HashSet<Object>();

public MainApplication() {
    try {
        ClassPathXmlApplicationContext springContext = new ClassPathXmlApplicationContext("applicationContext.xml");

        singletons.add(springContext.getBean("transformService", DataTransformService.class));
}

public Set<Class<?>> getClasses() {
    return classes;
}

protected ApplicationContext springContext;

public Set<Object> getSingletons() {
    return singletons;
}

}

以下是我添加的内容

<dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi</artifactId>
  <version>3.8-beta3</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>javax.mail</groupId>
  <artifactId>mail</artifactId>
  <version>1.4</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>commons-logging</groupId>
  <artifactId>commons-logging</artifactId>
  <version>1.1.1</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>commons-codec</groupId>
  <artifactId>commons-codec</artifactId>
  <version>1.2</version>
  <scope>provided</scope>
</dependency>
 <dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.14</version>
  <scope>provided</scope>
</dependency>


ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/reportv2]] StandardWrapper.Throwable: java.lang.RuntimeException: Failed to construct public com.osg.application.MainApplication()
at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:144) [:]
at org.jboss.resteasy.spi.ResteasyDeployment.createApplication(ResteasyDeployment.java:243) [:]
at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:191) [:]
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:67) [:]
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36) [:]
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1208) [:6.0.0.Final]
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:955) [:6.0.0.Final]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:188) [:6.0.0.Final]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [:6.0.0.Final]
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181) [:6.0.0.Final]
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285) [:1.1.0.Final]
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261) [:1.1.0.Final]
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88) [:6.0.0.Final]
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100) [:6.0.0.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [:6.0.0.Final]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [:6.0.0.Final]
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) [:6.0.0.Final]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [:6.0.0.Final]
at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53) [:6.0.0.Final]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [:6.0.0.Final]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [:6.0.0.Final]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654) [:6.0.0.Final]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [:6.0.0.Final]
at java.lang.Thread.run(Thread.java:695) [:1.6.0_65]
Caused by: java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Workbook
at java.lang.Class.getDeclaredConstructors0(Native Method) [:1.6.0_65]
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2446) [:1.6.0_65]
at java.lang.Class.getDeclaredConstructors(Class.java:1872) [:1.6.0_65]
at      org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:227) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:930) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:903) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) [:3.0.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) [:3.0.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) [:3.0.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) [:3.0.5.RELEASE]
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) [:3.0.5.RELEASE]
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) [:3.0.5.RELEASE]
at com.osg.application.MainApplication.<init>(MainApplication.java:19) [:]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [:1.6.0_65]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) [:1.6.0_65]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) [:1.6.0_65]
at java.lang.reflect.Constructor.newInstance(Constructor.java:513) [:1.6.0_65]
at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:132) [:]
... 23 more

Answer 1

Apache POI provides a components page详细介绍了项目的所有不同部分，您需要的罐子以及您需要的Maven工件。如果你看那里，你会看到以下内容：

|Component | Application type   | Maven artifactId | Notes
|Common SS | Excel XLS and XLSX | poi-ooxml | WorkbookFactory and friends all require poi-ooxml, not just core poi |

如上所述，如果您想使用所有常见的org.apache.poi.ss课程，则需要依赖poi-ooxml，而不仅仅依赖于poi

其次，编译时间！=运行时间。只是因为一个jar被maven吸了下来并且可以编译，并不意味着它会在你的代码运行时出现。您还需要确保使用代码打包依赖项，或者确保它们在运行时位于类路径中。

您似乎（来自堆栈跟踪）正在编写Web应用程序，因此您需要确保所有依赖项都放入/WEB-INF/lib/的战争中，以便它们在运行时存在。

最后，POI 3.8 beta 3是一个非常奇怪的版本。你应该选择最新的稳定版（现在是3.9版），或者最新的版本（不是3.10 beta版）。有关当前版本的详细信息，请参阅POI homepage。

java.lang.NoClassDefFoundError：org / apache / poi / ss / usermodel / Workbook

1 个答案: