求解关于jar包的问题

Question

我写了个程序，eclipse中运行无错，打成jar包运行也无措，但是放到tomcat中，用javawebstart运行，报错下面是错误原因，求高手告知原因谢谢！----------------------------------------------------
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: jxl/write/WritableCell
at com.maxwell.main.Main.actionPerformed(Main.java:73)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: jxl.write.WritableCell
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 37 more程序中调用了第三方jar包jxl.jar打的jar包如下格式其中MANIFEST.MF中的格式如下Manifest-Version: 1.0
Rsrc-Class-Path: ./ jxl.jar
Class-Path: .
Rsrc-Main-Class: com.maxwell.main.Main
Main-Class: org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoaderName: org/eclipse/jdt/internal/jarinjarloader/RsrcURLStreamHandlerFact
 ory.class
SHA1-Digest: F0QJkZOmudrrdVoEKYjtuD8NL/U=Name: org/eclipse/jdt/internal/jarinjarloader/JarRsrcLoader.class
SHA1-Digest: dfEYKwKuAs2FAaEfLAcReOMSrJI=Name: com/maxwell/main/OutPutExcel.class
SHA1-Digest: edu6FHuD+ftrh/BlP0id5QxvP1Q=Name: org/eclipse/jdt/internal/jarinjarloader/JarRsrcLoader$ManifestIn
 fo.class
SHA1-Digest: mUIFJAHXhz6AONcnvbPvP588LBE=Name: com/maxwell/main/Main.class
SHA1-Digest: q6eM24qKcx0HNomwMPZi42Ke5gA=Name: com/maxwell/main/Resources.class
SHA1-Digest: VlSe+z0aYSDXmQ3t7VAtAJXBtNw=Name: jxl.jar
SHA1-Digest: w3UmUceIf+pUC+Kdv/4x82riiJQ=Name: org/eclipse/jdt/internal/jarinjarloader/JIJConstants.class
SHA1-Digest: ohmPkG2z0utv9xOeivSU9wFaLeI=Name: org/eclipse/jdt/internal/jarinjarloader/RsrcURLStreamHandler.cla
 ss
SHA1-Digest: ePtsxI/5hHRJpNNXkpd8gWPXwR8=Name: org/eclipse/jdt/internal/jarinjarloader/RsrcURLConnection.class
SHA1-Digest: 1jOpkzeF/S9tXQx+L3EDoq9BvAA=请问是什么原因？Java Web Start

Answer 1

看下你main方法 73行 什么代码

Answer 2

new OutPutExcel().writeExcel(jtf1.getText(),rs.title);

Answer 3

你所说我也有尝试，但是我直接双击运行这个jar是可以的不报错的。不知道什么情况了。

Answer 4

明显没有把jar包加到classpath下。

Answer 5

如果说没有把jar加到classpath下，怎么解释我双击能够运行呢？我也觉得是这个情况，但是我不知道如何处理了。求解

Answer 6

缺少jar包应该是不错，lz将jxl.write.WritableCell 相关jar包放到tomcat的lib中试试。

Answer 7

感谢大家回复，我自己重新打包，然后通过了，现在的jar包的内容如下在javawebstart中成功运行。