报错

type Exception report

message javax.el.PropertyNotFoundException: Property 'lkmId' not found on type cn.itcast.entity.LinkMan

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: javax.el.PropertyNotFoundException: Property 'lkmId' not found on type cn.itcast.entity.LinkMan

	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:565)

	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:481)

	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)

	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

	org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:164)

	org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:191)

	com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:369)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:273)

	org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)

	org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)

	org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)

	org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)

	org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)

root cause

javax.el.PropertyNotFoundException: Property 'lkmId' not found on type cn.itcast.entity.LinkMan

	javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:259)

	javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:212)

	javax.el.BeanELResolver.property(BeanELResolver.java:346)

	javax.el.BeanELResolver.getValue(BeanELResolver.java:92)

	org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110)

	org.apache.el.parser.AstValue.getValue(AstValue.java:169)

	org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)

	org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:944)

	org.apache.jsp.jsp.linkman.list_jsp._jspx_meth_c_005fforEach_005f0(list_jsp.java:351)

	org.apache.jsp.jsp.linkman.list_jsp._jspService(list_jsp.java:227)

	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443)

	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)

	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

	org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:164)

	org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:191)

	com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:369)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:273)

	org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)

	org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)

	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)

	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)

	org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)

	org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)

	org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)

	org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)

note The full stack trace of the root cause is available in the Apache Tomcat/8.5.9 logs.

类中属性名和jsp中属性名不一致。

jsp表中如下：

<TD>

                                                    <a href="${pageContext.request.contextPath }/linkmanServlet?method=edit&lkmId=${linkman.lkmId}">修改</a>

                                                    &nbsp;&nbsp;

                                                    <a href="${pageContext.request.contextPath }/linkmanServlet?method=delete&lkmId=${linkman.lkmId}">删除</a>

                                                    </TD>

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