Question

java运行出错，求高人指点

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
at org.pdfbox.pdmodel.PDDocument.openProtection(PDDocument.java:905)
at org.pdfbox.pdmodel.PDDocument.decrypt(PDDocument.java:489)
at org.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:204)
at org.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:149)
at extractors.ExtractorPDF.getText(ExtractorPDF.java:25)
at extractors.ExtractorAll.getText(ExtractorAll.java:38)
at tianen.LuceneIndexer$LuceneIndexerTool.index(LuceneIndexer.java:241)
at tianen.LuceneIndexer$3.actionPerformed(LuceneIndexer.java:124)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
能提供这个类吗？给个下载地址

Answer 1

出现错误不要怕，关键是要知道怎么找到错误根源，然后再解决错误，出现异常，首先看第1行异常的类型 java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider，很明显是类没有找到org/bouncycastle/jce/provider/BouncyCastleProvider，这就是类的具体信息org/bouncycastle/jce/provider是包名，BouncyCastleProvider是类名，所以只要去下载这个相应的类就可以了，这个不baidu一下就很快能找到

Answer 2

发生严重的 Abstract Window Toolkit 错误

Answer 3

出现错误不要怕，

Answer 4

类没有找到，你找一下目录看有没有这个类的字节码文件

Answer 5

在sun官网下个API包 什么类都有

Answer 6

org/bouncycastle/jce/provider/BouncyCastleProvider 这个类没有找到啊

你下个JAR包吧