求解关于jar包的问题

[zhou2003737]

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.JarRsrcLoader

Name: 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？

[a8509190]

看下你main方法 73行 什么代码

[a8509190]

貌似少包了。

[zhou2003737]

引用 1 楼 a8509190 的回复:

看下你main方法 73行 什么代码

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

[zhou2003737]

引用 2 楼 a8509190 的回复:

貌似少包了。

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。

[花谢尊前不敢香]

明显没有把jar包加到classpath下。

[zhou2003737]

引用 5 楼 fangmingshijie 的回复:

明显没有把jar包加到classpath下。

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

[笑莫问]

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。

[zhou2003737]

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。

[zhou2003737]

引用 7 楼 hucp2007 的回复:

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。

这个我也试过，还不是这个问题，是打包的问题。感谢您。

[尹汪汪]

我也遇到这个问题，请问怎么打包才不会错，望不吝赐教