osgi 启动包 NoClassDefFoundError

Question

我正在阅读 Neil Bartlett 在 EclipseZone 上关于 OSGi 入门的系列文章。我在http://www.eclipsezone.com/eclipse/forums/t90796.html上第三节课。

创建并安装 jar 文件后，启动时出现问题：

org.osgi.framework.BundleException: The activator osgitut.movies.impl.MovieListerActivator for bundle MoviesLister is invalid
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:171)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:679)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:299)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:291)
        at org.eclipse.osgi.framework.internal.core.FrameworkCommandProvider._start(FrameworkCommandProvider.java:333)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.eclipse.osgi.framework.internal.core.FrameworkCommandInterpreter.execute(FrameworkCommandInterpreter.java:209)
        at org.eclipse.osgi.framework.internal.core.FrameworkConsole.docommand(FrameworkConsole.java:155)
        at org.eclipse.osgi.framework.internal.core.FrameworkConsole.runConsole(FrameworkConsole.java:140)
        at org.eclipse.osgi.framework.internal.core.FrameworkConsole.run(FrameworkConsole.java:104)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NoClassDefFoundError: osgitut/movies/MovieLister
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2413)
        at java.lang.Class.getConstructor0(Class.java:2723)
        at java.lang.Class.newInstance0(Class.java:345)
        at java.lang.Class.newInstance(Class.java:327)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:166)

这是清单：

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Movies Lister
Bundle-SymbolicName: MoviesLister
Bundle-Version: 1.0.0
Bundle-Activator: osgitut.movies.impl.MovieListerActivator
Import-Package: org.osgi.framework,org.osgi.util.tracker,osgitut.movies
Export-Package: osgitut.movies;version="1.0.0",osgitut.movies.impl;version="1.0.0"

看起来缺少 osgitut/movies/MovieLister 类，但它在我创建的 jar 文件中。我怀疑我在清单中遗漏了一些东西，但我不知道是什么。

Answer 1

您有一个NoClassDefFoundError，它表明MovieListener 类本身并不完整，它依赖于一个超类，或者有一个无法在包中解析该类的成员。