我有java项目,它有spring依赖项。我正在通过ANT构建一个jar文件,如下所示
<jar jarfile="Test.jar">
<manifest>
<attribute name="Main-Class" value="com.karthik.EntryPoint"/>
</manifest>
<fileset dir="${build.classes.dir}" includes="**" />
</jar>
当我运行命令 java -jar Test.jar 时。我收到错误,如下所示
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.springframework.context.ApplicationContext
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
为了解决这个问题,我创建了一个胖/超级jar,它具有所有Spring依赖关系,如下所示:
<jar jarfile="Test.jar">
<zipgroupfileset dir="${build.dir}/lib" includes="spring*.jar" />
<manifest>
<attribute name="Main-Class" value="com.karthik.EntryPoint"/>
</manifest>
<fileset dir="${build.classes.dir}" includes="**" />
<fileset dir="${src.java.dir}" includes="**/*.java" />
</jar>
我现在可以看到Test.jar中捆绑的Spring类。
但是当我运行命令 java -jar Test.jar 时,我收到一个错误,如下所示
Error: Could not find or load main class com.karthik.EntryPoint
为什么我只在uber / fat jar中收到此错误,我们如何解决?