Eclipse - Web 应用程序 Tomcat 部署失败

Question

任何帮助将不胜感激。我正在运行一个 Web 应用程序，它依赖于我工作空间中的另外两个项目。这两个项目进一步依赖于我工作区中的其他 3 个项目。工作空间内的任何项目都没有错误。在 Tomcat 中运行 Web 应用程序会产生以下错误：

java.lang.NoClassDefFoundError: com/tele/misc/DefaultApplicationModule

这是第一级依赖项目中的一个类。直到最近一切正常。这显然是某种类路径问题？关于如何在 Eclipse 元数据中找到它并解决这个问题的任何建议？

更多细节：

控制台：

*******************************************************************
*** WARNING: Apache MyFaces-2 is running in DEVELOPMENT mode.   ***
***                                         ^^^^^^^^^^^         ***
*** Do NOT deploy to your live server(s) without changing this. ***
*** See Application#getProjectStage() for more information.     ***
*******************************************************************

Feb 13, 2014 1:41:18 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
Feb 13, 2014 1:41:18 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/CRGen] startup failed due to previous errors
Feb 13, 2014 1:41:18 PM org.apache.catalina.core.StandardContext listenerStop
SEVERE: Exception sending context destroyed event to listener instance of class         za.co.huge.processor.CRToolContextListener
java.lang.NoClassDefFoundError: com/tele/misc/DefaultApplicationModule
    at za.co.huge.processor.ReportProcessor.<init>(ReportProcessor.java:30)
    at za.co.huge.processor.ReportProcessor.getInstance(ReportProcessor.java:41)
    at     za.co.huge.processor.CRToolContextListener.contextDestroyed(CRToolContextListener.java:22)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4927)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5573)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
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$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)

Feb 13, 2014 1:41:18 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Feb 13, 2014 1:41:18 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Feb 13, 2014 1:41:18 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2547 ms

所有这些都源自我的 servlet 上下文侦听器：

<!-- CRTool Context listener starts report processing Engine -->
<listener>
    <listener-class>za.co.huge.processor.CRToolContextListener</listener-class>
</listener>

在依赖项目的 Guice 模块上初始化时失败：

/* singleton design pattern - so only one service thread can be running */
private ReportProcessor(final long sleepTime){
    serviceThread = new ServiceThread(sleepTime);
    thread = new Thread(serviceThread);
    thread.setPriority(Thread.MIN_PRIORITY);
    final Injector injector = Guice.createInjector(new     DefaultApplicationModule());
//      final Injector injector = Guice.createInjector(new CommissionsModule(), new     DefaultApplicationModule());
//      ci = injector.getInstance(CommissionsImpl.class);
    }

Answer 1

编译代码后，程序中的每个类都会得到.class 文件。这些二进制文件是 Java 解释以执行您的程序的字节码。 NoClassDefFoundError 表示负责动态加载类的类加载器找不到您尝试使用的类的.class 文件。这可能表明您在执行代码时没有设置类路径选项。此链接说明了如何在执行时设置类路径。 http://en.wikipedia.org/wiki/Classpath_%28Java%29