java.lang.NoClassDefFoundError:无法初始化类com.itextpdf.text.pdf.s

Question

我正在尝试为我的pdf文档添加数字签名。在运行代码

时

MakeSignature.signDetached(appearance,digest,es,chain, 
  null, null, null, 0, CryptoStandard.CMS);

我得到以下错误。请帮帮我。

ERROR [http-8080-Processor24] - Servlet.service() for servlet action threw exception
java.lang.NoClassDefFoundError: Could not initialize class com.itextpdf.text.pdf.security.CertificateInfo$X500Name
  at com.itextpdf.text.pdf.security.CertificateInfo.getSubjectFields(CertificateInfo.java:354)
  at com.itextpdf.text.pdf.PdfSignatureAppearance.getAppearance(PdfSignatureAppearance.java:832)
  at com.itextpdf.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:1205)
  at com.itextpdf.text.pdf.security.MakeSignature.signDetached(MakeSignature.java:134)
  at ksrtc.eis.presentation.action.Signatures.signPdfFirstTime(Signatures.java:112)
  at ksrtc.eis.presentation.action.Signatures.main(Signatures.java:221)
  at ksrtc.eis.presentation.action.AttandanceAction.execute(AttandanceAction.java:95)
  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873)
  at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
  at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
  at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
  at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
  at java.lang.Thread.run(Thread.java:701)

Answer 1

您将在此实现中使用iTextPdf.jar。请确保此jar已添加到您的类路径中。如果你使用的是eclipse，要将jar添加到类路径中，请执行以下操作:右键单击project -> Java构建路径-> Libraries -> Add external jar

如果您在任何其他依赖类文件中面临相同的问题，也对该jar执行上述步骤。做一个干净的构建，你的问题应该得到解决。

Answer 2

删除Apache-all库集，它为我工作。

Answer 3

我使用Eclipse编辑器在一个示例下载的应用程序上使用text5来锁定PDF文件。库集中的X和bounty castle库和apacheds-all 1.5.4.jar。它在Eclipse中运行得非常好。然后，我开始使用相同的样例应用程序和库开发JDeveloper。但是找不到类和安全问题。

我玩了一整天都没弄明白。第二天早上，我删除了apacheds-all-1.5.4.jar，应用程序运行正常。希望能有所帮助!