javaweb中jsp问题：成功解决：org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException

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已于 2024-03-21 00:19:52 修改

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文章标签： java tomcat

于 2023-07-08 11:33:13 首次发布

本文链接：https://blog.youkuaiyun.com/m0_56762649/article/details/131609500

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文章描述了一个在学习JSP时遇到的500错误，该错误涉及Tomcat与JDK版本兼容性。尽管本地Tomcat环境下没有问题，但在特定情况下出现了加载java.lang.System类失败的编译错误。错误日志详细列出了从编译到运行时的堆栈跟踪。作者排除了版本不匹配的可能性，并提供了官方的Tomcat与JDK版本对照表作为参考，同时建议优先使用本地Tomcat而非Maven内置的来解决问题。

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3）解决方案：使用maven内置tomcat时

5、成功编辑

1、错误背景

前几天复习javaweb时，复习到jsp时，出现了以下错误，这个错误也是学习jsp脚本新手很容易遇到的错误。

1）可能原因：查了很多资料，有的出现这个错误是因为tomcat版本与jdk版本不一致，jdk1.8对应的tomcat版本应该至少是7版本以上，因此我排除了这个可能。

2）我把项目复制了一份放到了我本地的tomcat目录下的webapps目录下，启动tomcat后，访问jsp页面并不报错，页面和控制台都正常显示内容和语句。

3）下面是测试时用的test1.jsp文件

2、错误描述

1）页面500

2）控制台输出

08-Jul-2023 12:05:34.692 严重 [http-nio-8080-exec-3] org.apache.jasper.compiler.JDTCompiler$1.findType 加载类[java.lang.System]失败
	org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException
		at org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader.<init>(ClassFileReader.java:406)
		at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:231)
		at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:207)
		at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:174)
		at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getType(PackageBinding.java:145)
		at org.eclipse.jdt.internal.compiler.lookup.Scope.findType(Scope.java:1926)
		at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:3254)
		at org.eclipse.jdt.internal.compiler.lookup.Scope.getBinding(Scope.java:2192)
		at org.eclipse.jdt.internal.compiler.lookup.BlockScope.getBinding(BlockScope.java:485)
		at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:999)
		at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:636)
		at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:1026)
		at org.eclipse.jdt.internal.compiler.ast.Block.resolveUsing(Block.java:130)
		at org.eclipse.jdt.internal.compiler.ast.TryStatement.resolve(TryStatement.java:1073)
		at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:634)
		at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:306)
		at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:544)
		at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1195)
		at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1308)
		at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:593)
		at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:867)
		at org.eclipse.jdt.internal.compiler.Compiler.processCompiledUnits(Compiler.java:550)
		at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:462)
		at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:417)
		at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:587)
		at org.apache.jasper.compiler.Compiler.compile(Compiler.java:381)
		at org.apache.jasper.compiler.Compiler.compile(Compiler.java:351)
		at org.apache.jasper.compiler.Compiler.compile(Compiler.java:335)
		at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:597)
		at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
		at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:383)
		at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:331)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:682)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:932)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1695)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
		at java.base/java.lang.Thread.run(Thread.java:833)
08-Jul-2023 12:05:39.428 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory 把web 应用程序部署到目录 [D:\Projects\apache-tomcat-8.5.90\apache-tomcat-8.5.90\webapps\manager]
08-Jul-2023 12:05:39.485 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Web应用程序目录[D:\Projects\apache-tomcat-8.5.90\apache-tomcat-8.5.90\webapps\manager]的部署已在[57]毫秒内完成