我在本地tomcat上运行很好，但是发布到服务器jboss上就报错，错误如下：
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org.apache.jasper.JasperException: File "/struts-tags" not found
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:116)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:160)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:429)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:491)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1438)
org.apache.jasper.compiler.Parser.parse(Parser.java:137)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:255)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:171)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:333)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:313)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:300)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:312)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:413)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
你出现过这样的问题吗？我的架包中本来就没有sevlet.jar
追答出现过 weblogic上的问题 感觉这些都是相通的
有没添加引用啊 eclispse 项目 右键 buildpath 最后 再 add jars 或者第二项
你再看看jsp页面内有空指针异常没
Vaadin Spring Projekt期望no-arg构造函数，只在tomcat上不是本地的
我试图在Ubuntu 18.04服务器上的Tomcat应用程序服务器上运行Spring Boot的Vaadin projekt。
我下载了Vaadin Flow Spring Starter Projekt：https://vaadin.com/start/latest/project-base-spring
但是当我在tomcat上部署并尝试打开它时，我收到此错误：
There was an exception while trying to navigate to '' with the exception message 'Unable to create an instance of 'de.web.michail.spring.MainView'. Make sure the class has a public no-arg constructor.'
java.lang.IllegalArgumentException: Unable to create an instance of 'de.web.michail.spring.MainView'. Make sure the class has a public no-arg constructor.
at com.vaadin.flow.internal.ReflectTools.createProxyInstance(ReflectTools.java:515)
at com.vaadin.flow.internal.ReflectTools.createInstance(ReflectTools.java:447)
at com.vaadin.flow.di.DefaultInstantiator.getOrCreate(DefaultInstantiator.java:65)
at com.vaadin.flow.di.Instantiator.createRouteTarget(Instantiator.java:158)
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.lambda$getRouteTarget$1(AbstractNavigationStateRenderer.java:116)
at java.base/java.util.Optional.orElseGet(Optional.java:358)
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.getRouteTarget(AbstractNavigationStateRenderer.java:115)
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:167)
at com.vaadin.flow.router.Router.handleNavigation(Router.java:221)
at com.vaadin.flow.router.Router.navigate(Router.java:192)
at com.vaadin.flow.router.Router.initializeUI(Router.java:95)
at com.vaadin.flow.server.BootstrapHandler.createAndInitUI(BootstrapHandler.java:1117)
at com.vaadin.flow.server.BootstrapHandler.synchronizedHandleRequest(BootstrapHandler.java:396)
at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1533)
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:227)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
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:53)
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:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
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:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:844)
我不明白这个基本示例项目是如何运行的。你是tomcat的问题吗？也许像WildFly这样的其他应用程序服务器会运行正确吗？
让Application扩展SpringBootServletInitializer解决了这个问题。
public class Application extends SpringBootServletInitializer {
// ...
}
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