Can not find a java.io.InputStream with the name [DownloadFile] in the invocation stack.

1. Description of the error

August 14, 2015 4:22:45 pm com.opensymphony.xwork2.util.logging.jdk.JdkLogger Error severity: Exception occurred during processing R Equest:can not find a java.io.InputStream with the name [DownloadFile] in the invocation stack. Check the <param name= "InputName" > tag specified for this action.java.lang.IllegalArgumentException:Can not find a Java.io.InputStream with the name [DownloadFile] in the invocation stack. Check the <param name= "InputName" > tag specified for this action.at Org.apache.struts2.dispatcher.StreamResult.doExecute (streamresult.java:237) at Org.apache.struts2.dispatcher.StrutsResultSupport.execute (strutsresultsupport.java:191) at Com.opensymphony.xwork2.DefaultActionInvocation.executeResult (defaultactioninvocation.java:369) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:273) at Org.apache.struts2.interceptor.DeprecationInterceptor.intercept (deprecationinterceptor.java:41) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (Defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept ( debugginginterceptor.java:256) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept ( defaultworkflowinterceptor.java:167) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept ( methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept ( validationinterceptor.java:265) at Org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept ( annotationvalidationinterceptor.java:76) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptOr. Conversionerrorinterceptor.intercept (conversionerrorinterceptor.java:138) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept (parametersinterceptor.java:229) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept (parametersinterceptor.java:229) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept (staticparametersinterceptor.java:191 ) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.intercEptor. Multiselectinterceptor.intercept (multiselectinterceptor.java:73) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept (datetextfieldinterceptor.java:125) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.CheckboxInterceptor.intercept (checkboxinterceptor.java:91) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.FileUploadInterceptor.intercept (fileuploadinterceptor.java:253) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept (modeldriveninterceptor.java:100) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept (Scopedmodeldriveninterceptor.java:141) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept ( chaininginterceptor.java:145) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept ( prepareinterceptor.java:171) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept ( methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept ( i18ninterceptor.java:139) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (Defaultactioninvocation.java : 244) at Org.apache.struts2.interceptor.ServletConfigInterceptor.intercept (servletconfiginterceptor.java:164) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymPhony.xwork2.interceptor.AliasInterceptor.intercept (aliasinterceptor.java:193) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept (exceptionmappinginterceptor.java:189 ) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.impl.StrutsActionProxy.execute (strutsactionproxy.java:54) at Org.apache.struts2.dispatcher.Dispatcher.serviceAction (dispatcher.java:564) at Org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction (executeoperations.java:81) at Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter ( strutsprepareandexecutefilter.java:99) at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter ( applicationfilterchain.java:239) at Org.apache.catalina.core.ApplicationFilterChain.doFilter ( applicationfilterchain.java:206) at Org.apache.catalina.core.StandardWrapperValve.invoke (Standardwrappervalve.java:219) at Org.apache.catalina.core.StandardContextValve.invoke (standardcontextvalve.java:106) at Org.apache.catalina.authenticator.AuthenticatorBase.invoke (authenticatorbase.java:502) at Org.apache.catalina.core.StandardHostValve.invoke (standardhostvalve.java:142) at Org.apache.catalina.valves.ErrorReportValve.invoke (errorreportvalve.java:79) at Org.apache.catalina.valves.AbstractAccessLogValve.invoke (abstractaccesslogvalve.java:610) at Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:88) at Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:518) at Org.apache.coyote.http11.AbstractHttp11Processor.process (abstracthttp11processor.java:1091) at Org.apache.coyote.abstractprotocol$abstractconnectionhandler.process (abstractprotocol.java:668) at Org.apache.coyote.http11.http11nioprotocol$http11connectionhandler.process (http11nioprotocol.java:223) at Org.apache.tomcat.util.net.nioendpoint$socketprocessor.dorun (nioendpoint.java:1517) at Org.Apache.tomcat.util.net.nioendpoint$socketprocessor.run (nioendpoint.java:1474) 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) August 14, 2015 4:22:45 pm com.opensymphony.xwork2.util.logging.jdk.JdkLogger error Critical: Can not find a java.io . InputStream with the name [DownloadFile] in the invocation stack. Check the <param name= "InputName" > tag specified for this action. August 14, 2015 4:22:45 pm com.opensymphony.xwork2.util . Logging.jdk.JdkLogger Error Critical: Exception occurred during processing Request:can not find a java.io.InputStream with the Name [DownloadFile] in the invocation stack. Check the <param name= "InputName" > tag specified for this action.java.lang.IllegalArgumentException:Can not find a Java.io.InputStream with the name [DownloadFile] in the invocation stack. Check the <param name= "InputName" > tag specified for this action.at Org.apache.struts2.dispatcher.StreamResult.doExecute (streamresult.java:237) at Org.apache.struts2.dispatcher.StrutsResultSupport.execute (strutsresultsupport.java:191) at Com.opensymphony.xwork2.DefaultActionInvocation.executeResult (defaultactioninvocation.java:369) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:273) at Org.apache.struts2.interceptor.DeprecationInterceptor.intercept (deprecationinterceptor.java:41) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept (debugginginterceptor.java:256) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept (defaultworkflowinterceptor.java:167 ) at Com.opensymphony.xwork2.interceptor.MethodFilteRinterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept (validationinterceptor.java:265) at Org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept ( annotationvalidationinterceptor.java:76) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept (conversionerrorinterceptor.java:138) At Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept (parametersinterceptor.java:229) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensympHony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept (parametersinterceptor.java:229) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept (methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept (staticparametersinterceptor.java:191 ) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.MultiselectInterceptor.intercept (multiselectinterceptor.java:73) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept (datetextfieldinterceptor.java:125) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.ChEckboxinterceptor.intercept (checkboxinterceptor.java:91) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.struts2.interceptor.FileUploadInterceptor.intercept (fileuploadinterceptor.java:253) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept (modeldriveninterceptor.java:100) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept (Scopedmodeldriveninterceptor.java : 141) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept (chaininginterceptor.java:145) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept (Prepareinterceptor.java:171) at Com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept ( methodfilterinterceptor.java:98) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke ( defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept ( i18ninterceptor.java:139) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (Defaultactioninvocation.java : 244) at Org.apache.struts2.interceptor.ServletConfigInterceptor.intercept (servletconfiginterceptor.java:164) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept (aliasinterceptor.java:193) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept (exceptionmappinginterceptor.java:189 ) at Com.opensymphony.xwork2.DefaultActionInvocation.invoke (defaultactioninvocation.java:244) at Org.apache.strUts2.impl.StrutsActionProxy.execute (strutsactionproxy.java:54) at Org.apache.struts2.dispatcher.Dispatcher.serviceAction (dispatcher.java:564) at Org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction (executeoperations.java:81) at Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter ( strutsprepareandexecutefilter.java:99) at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter ( applicationfilterchain.java:239) at Org.apache.catalina.core.ApplicationFilterChain.doFilter ( applicationfilterchain.java:206) at Org.apache.catalina.core.StandardWrapperValve.invoke ( standardwrappervalve.java:219) at Org.apache.catalina.core.StandardContextValve.invoke (Standardcontextvalve.java : 106) at Org.apache.catalina.authenticator.AuthenticatorBase.invoke (authenticatorbase.java:502) at Org.apache.catalina.core.StandardHostValve.invoke (standardhostvalve.java:142) at Org.apache.catalina.valves.ErrorReportValve.invoke (errorreportvalve.java:79) at Org.apache.catalina.valves.AbstRactaccesslogvalve.invoke (abstractaccesslogvalve.java:610) at Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:88) at Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:518) at Org.apache.coyote.http11.AbstractHttp11Processor.process (abstracthttp11processor.java:1091) at Org.apache.coyote.abstractprotocol$abstractconnectionhandler.process (abstractprotocol.java:668) at Org.apache.coyote.http11.http11nioprotocol$http11connectionhandler.process (http11nioprotocol.java:223) at Org.apache.tomcat.util.net.nioendpoint$socketprocessor.dorun (nioendpoint.java:1517) at Org.apache.tomcat.util.net.nioendpoint$socketprocessor.run (nioendpoint.java:1474) 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. Cause of error

<action name= "Download" class= "com.you.mail.action.DownloadAction" ><result name= "Success" type= "Stream" ><param name= "ContentType" >application/vnd.ms-powerpoint</param><param name= " Contentdisposition ">filename=" ceshi.ppt "</param><param name=" InputName ">downloadFile</param ></result></action>

3, the solution of the method

In the download action, the configuration parameters are not downloadfile, resulting in an error; View action, parameter named filename, change downloadfile to filename

Can not find a java.io.InputStream with the name [DownloadFile] in the invocation stack.