应用程序 (.jar) 错误 - NoClassDefFoundError

Question

我创建了一个 Java 应用程序并将其导出到 .jar 文件。当我运行在我的 NetBeans 机器上显示所需的输出和消息时，它运行非常好。

然而，我的朋友在她的电脑上执行了它，但没有成功。我使用 Launch4j 将其转换为 .exe，但应用程序仍无法正常工作。

我使用了 Jasypt 库并将所有 .jar 文件导入到项目中。每当我运行它。 Launch4j 抛出这些错误：

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/jasypt/util/text/BasicTextEncryptor
at encryption.Encryption.encryption(Encryption.java:44)
at encryption.Encryption.jButton1ActionPerformed(Encryption.java:174)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access0(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.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: org.jasypt.util.text.BasicTextEncryptor
    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)
    ... 39 more

谁能告诉我发生了什么事？

Answer 1

我考虑两件事：

你的朋友 Java 在他的电脑上吗？（运行库）
如果您的 jar 文件适用于您的 OS，请尝试在您朋友的 OS 上使用 Launch4j 以生成包含您的 jar 文件的 .exe。

Answer 2

您应该创建一个包含所有需要的 jars（库）的主 jar 文件，然后您可以使用 Launch4j 生成您的 exe 文件。

看这里Launch4J - how to attach dependent jars to generated exe

应用程序 (.jar) 错误 - NoClassDefFoundError

Application (.jar) error - NoClassDefFoundError

java

swing

noclassdeffounderror

executable-jar