java - Maven/ Spring /Java : ClassNotFoundException - but I know class is there

Question

我有 2 个这样设置的 Maven 项目:

-com.wuntee.rsaAuthenticationManager (jar)

-com.wuntee.taac (pom)
--taac-backend-gui (jar)
--taac-web (war)

“com.wuntee.rsaAuthenticationManager”是“taac-backend-gui”中的一个部门。在 taac-backend-gui 中运行测试用例时，一切正常，但在尝试启动 taac-web 时，我得到以下 ClassNotFoundException - 包含类“weblogic.security.SSL.TrustManager”的库也在我的本地 Maven 存储库，并设置为 com.wuntee.rsaAuthenticationManager 的依赖项。有谁知道为什么我会收到此错误？我也尝试过直接将包含 TrustManager 的库添加到 taac-web 项目中，但仍然得到相同的异常。有什么想法吗？

ERROR[com.wuntee.taac.business.TaacWorkshop][main] - couldnt create rsa dao:
com.rsa.common.SystemException: Command target (CommandAPIConnection) initialization failure
    java.lang.NoClassDefFoundError: weblogic/security/SSL/TrustManager
    at com.rsa.command.ConnectionFactory.getSpringBeanTarget(ConnectionFactory.java:212)
    at com.rsa.command.ConnectionFactory.getTarget(ConnectionFactory.java:170)
    at com.rsa.command.ConnectionFactory.getConnection(ConnectionFactory.java:246)
    at com.wuntee.rsaAuthenticationManager.RsaAuthenticationManagerDao.init(RsaAuthenticationManagerDao.java:60)
    at com.wuntee.taac.business.TaacWorkshop.<init>(TaacWorkshop.java:68)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:501)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:72)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:939)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:892)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:479)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
    at org.apache.catalina.core.StandardService.start(StandardService.java:516)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:592)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: com.rsa.ims.components.NoSuchComponentException: Unable to locate bean CommandAPIConnection
    at com.rsa.ims.components.spring.SpringComponentManagerImpl.getBean(SpringComponentManagerImpl.java:71)
    at com.rsa.command.ConnectionFactory.getSpringBeanTarget(ConnectionFactory.java:209)
    ... 39 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'CacheableCommandTargetBasicAuth': FactoryBean threw exception on object creation; nested exception is java.lang.reflect.InvocationTargetException
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:150)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1387)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1044)
    at com.rsa.ims.components.spring.SpringComponentManagerImpl.getBean(SpringComponentManagerImpl.java:69)
    ... 40 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:501)
    at com.rsa.command.RemoteCommandTargetFactoryBean.getObject(RemoteCommandTargetFactoryBean.java:273)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:143)
    ... 46 more
Caused by: java.lang.NoClassDefFoundError: weblogic/security/SSL/TrustManager
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:164)
    at com.rsa.command.InitialContextFactoryLocator.getInitialContextFactory(InitialContextFactoryLocator.java:72)
    at com.rsa.command.EJBRemoteTarget.<init>(EJBRemoteTarget.java:189)
    ... 52 more

在 com.wuntee.rsaAuthenticationManager 项目中，缺少类的依赖项定义为:

<dependency>
    <groupId>com.rsa</groupId>
    <artifactId>wlfullclient</artifactId>
    <version>1.0</version>
    <type>jar</type>
    <scope>compile</scope>
</dependency>

注意:这个dep也可以添加到taac-web项目中，我还是报同样的异常。

我也确认了带有类的.jar在tomcat web-root目录的WEB-INF/lib/目录下，并且类确实存在...:

./wlfullclient-1.0.jar
weblogic/security/SSL/TrustManager.class
weblogic/security/SSL/TrustManagerJSSE.class

Answer 1

Maven 依赖项并不总是可传递的。如果 taac-backend-gui 使用 scope="test" 或 optional="true" 声明其对 com.wuntee.rsaAuthenticationManager 的依赖，com.wuntee.rsaAuthenticationManager 将不会自动成为com.wuntee.taac的依赖

这些中的任何一个都与您描述的症状一致。