Exception in thread “AWT-EventQueue-0“ java.lang.NoClassDefFoundError问题解决

采用Maven构建非Spring项目，在开发阶段能够正常开发（采用IDEA直接run，是可以运行的），通过maven打包后，通过java -jar 运行项目报错：Exception in thread “AWT-EventQueue-0” java.lang.NoClassDefFoundError， 查看网上各种办法不得行，后面捣鼓半天明白原来是在打包时候出现的问题。

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Workbook
        at gui.MainGUI.(MainGUI.java:19)
        at Application$1.run(Application.java:15)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:709)
        at java.awt.EventQueue$3.run(EventQueue.java:703)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.Workbook
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)

在某些第三发包的引入下，采用以下maven构建时会将第三方jar忽略掉，也就是没有进行打包，导致项目无法运行

原来打包的maven文件为：

...
...
...

    
        
            
                org.apache.maven.plugins
                maven-jar-plugin
                2.4
                
                    
                        
                            true
                            Application
                            
                        
                    
                
            
        
    

采用将依赖jar打包到项目中，修改maven文件
pom.xml

...
...
    
        
            
                org.apache.maven.plugins
                maven-assembly-plugin
                2.5.5
                
                    
                        
                            Application
                        
                    
                    
                        jar-with-dependencies
                    
                
                
                
                    
                        make-assembly
                        package
                        
                            single