Tomcat运行报错:java.lang.ClassNotFoundException: org.eclipse.jdt.core.dom.ASTParser_caused by: java.lang.securityexception: class "org-优快云博客

本文链接：https://blog.youkuaiyun.com/pure_ly/article/details/84674600

当在Tomcat中运行项目并尝试进行操作时，遇到java.lang.ClassNotFoundException: org.eclipse.jdt.core.dom.ASTParser的错误。为解决此问题，可以右击项目，选择Properties，进入Deployment Assembly，然后添加缺少的jar包，如自定义的user library。确保在发布到Tomcat时包含所有必要的依赖，这样就能避免此类错误。

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1.问题描述

启动Tomcat，在页面上进行操作后，报错：

java.lang.ClassNotFoundException: org.eclipse.jdt.core.dom.ASTParser
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1136)
	at utils.GetLineNumber.getNumber(GetLineNumber.java:16)
	at lucene.SearchIndex.searchIndex(SearchIndex.java:158)
	at org.apache.jsp.search_jsp._jspService(search_jsp.java:186)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

2.解决方法

右击“项目”-->选择“Properties”-->选择“Deployment Assembly”-->选择“add”(添加相应的jar包）

说明：在这个项目中，我使用了自己 user library，在发布Tomcat时，没有添加进去，所以报错，加进去解决了。

参考文章：https://blog.youkuaiyun.com/u011781521/article/details/72936830