Java 在SpringWebFlow中上载文件-错误处理？

我正在使用SpringWebFlow和

org.springframework.web.multipart.commons.commons multipartfile

从网页上传文件。当输入表单通过验证时，上传工作正常。当表单验证失败并且Web流试图重新显示页面时，就会出现问题。它似乎试图重新加载文件上载控件。它查找上载使用的临时文件，但它不在那里。查看实际的

MultipartFile.java

源代码，我看到以下评论：

The temporary storages will be cleared at the end of request processing.

因此，应用程序不会重新显示web表单，而是在下面抛出此错误。在Web流内部处理此问题的最佳方法是什么（请记住，Web流不会提供与“常规”MVC相同的控制级别）。我可以扔掉MultipartFile对象中的任何内容，但是我不知道初始化它的目的是什么

我现在得到的是：

org.springframework.webflow.execution.repository.FlowExecutionRestorationFailureException: A problem occurred restoring the flow execution with key 'e1s5'
    at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshotFactory.restoreExecution(SerializedFlowExecutionSnapshotFactory.java:82)
    at org.springframework.webflow.execution.repository.snapshot.AbstractSnapshottingFlowExecutionRepository.restoreFlowExecution(AbstractSnapshottingFlowExecutionRepository.java:89)
    at org.springframework.webflow.execution.repository.impl.DefaultFlowExecutionRepository.getFlowExecution(DefaultFlowExecutionRepository.java:115)
    at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:168)
    at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:165)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:203)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:181)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Caused by: org.springframework.webflow.execution.repository.snapshot.SnapshotUnmarshalException: IOException thrown deserializing the flow execution stored in this snapshot -- this should not happen!
    at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshot.unmarshal(SerializedFlowExecutionSnapshot.java:101)
    at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshotFactory.restoreExecution(SerializedFlowExecutionSnapshotFactory.java:80)
    ... 34 more
Caused by: java.io.FileNotFoundException: C:\Users\wombat\.IntelliJIdea12\system\tomcat\Unnamed_workspace_credapp_3\work\Catalina\localhost\Application\upload_57256533_a72f_42e6_97a6_7722c4872b68_00000044.tmp (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:120)
    at org.apache.commons.fileupload.disk.DiskFileItem.readObject(DiskFileItem.java:663)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at java.util.HashMap.readObject(HashMap.java:1030)
    at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
    at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:479)
    at org.springframework.webflow.core.collection.LocalAttributeMap.readObject(LocalAttributeMap.java:331)
    at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at org.springframework.webflow.engine.impl.FlowSessionImpl.readExternal(FlowSessionImpl.java:153)
    at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at java.util.LinkedList.readObject(LinkedList.java:964)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at org.springframework.webflow.engine.impl.FlowExecutionImpl.readExternal(FlowExecutionImpl.java:304)
    at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1791)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshot.deserialize(SerializedFlowExecutionSnapshot.java:194)
    at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshot.unmarshal(SerializedFlowExecutionSnapshot.java:99)
    ... 35 more

org.springframework.webflow.execution.repository.FlowExecutionRestorationFailureException:使用键“e1s5”还原流执行时出现问题
位于org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshotFactory.restoreExecution（SerializedFlowExecutionSnapshotFactory.java:82）
位于org.springframework.webflow.execution.repository.snap.AbstractSnapshottingFlowExecutionRepository.restoreFlowExecution（AbstractSnapshottingFlowExecutionRepository.java:89）
位于org.springframework.webflow.execution.repository.impl.DefaultFlowExecutionRepository.getFlowExecution（DefaultFlowExecutionRepository.java:115）
位于org.springframework.webflow.executor.flowExecuteImpl.resumeExecution（flowExecuteImpl.java:168）
位于org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle（FlowHandlerAdapter.java:183）
位于org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:925）
位于org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:856）
位于org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:920）
位于org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:816）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:621）
位于org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:801）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:728）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
位于net.bull.javamelody.MonitoringFilter.doFilter（MonitoringFilter.java:165）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
位于net.bull.javamelody.MonitoringFilter.doFilter（MonitoringFilter.java:203）
net.bull.javamelody.MonitoringFilter.doFilter（MonitoringFilter.java:181）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
位于org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:222）
位于org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:123）
位于org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）
位于org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:171）
位于org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:99）
位于org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:953）
位于org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）
位于org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）
位于org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1023）
位于org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process（AbstractProtocol.java:589）
位于org.apache.tomcat.util.net.aprendop$SocketProcessor.run（aprendop.java:1852）
位于java.util.concurrent.ThreadPoolExecutor$Worker.runTask（ThreadPoolExecutor.java:886）
位于java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:908）
运行（Thread.java:662）
由以下原因引起：org.springframework.webflow.execution.repository.snapshot.SnapshotUnmarshaleException:IOException引发反序列化存储在此快照中的流执行--不应发生这种情况！
位于org.springframework.webflow.execution.repository.snapshot.SerializedLowexecutionsNapshot.unmarshal（SerializedLowexecutionsNapshot.java:101）
位于org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshotFactory.restoreExecution（SerializedFlowExecutionSnapshotFactory.java:80）
... 34多
原因：java.io.FileNotFoundException:C:\Users\wombat\.IntelliJIdea12\system\tomcat\Unnamed\u workspace\u credapp\u 3\work\Catalina\localhost\Application\upload\u 57256533\u a72f\u 42e6\u 97a6\u 7722c4872b68\u 00000044.tmp（系统找不到指定的文件）
在java.io.FileInputStream.open（本机方法）
位于java.io.FileInputStream。（FileInputStream.java:120）
位于org.apache.commons.fileupload.disk.DiskFileItem.readObject（DiskFileItem.java:663）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）中
位于java.lang.reflect.Method.invoke（Method.java:597）
位于java.io.ObjectStreamClass.invokeReadObject（ObjectStreamClass.java:969）
位于java.io.ObjectInputStream.readSerialData（ObjectInputStream.java:1848）
在java.io.ObjectInputStream.ReadOrderinaryObject（对象
    public MultipartHttpServletRequest resolveMultipart(HttpServletRequest request) throws MultipartException {
        String encoding = determineEncoding(request);
        FileUpload fileUpload = prepareFileUpload(encoding);
        try {
        List fileItems = ((ServletFileUpload) fileUpload).parseRequest(request);
        MultipartParsingResult parsingResult = parseFileItems(fileItems, encoding);
        return new DefaultMultipartHttpServletRequest(
                request, parsingResult.getMultipartFiles(), parsingResult.getMultipartParameters(), parsingResult.getMultipartParameterContentTypes());
        } catch (FileUploadBase.SizeLimitExceededException ex) {
            throw new MaxUploadSizeExceededException(fileUpload.getSizeMax(), ex);
        }
        catch (FileUploadException ex) {
            throw new MultipartException("Could not parse multipart servlet request", ex);
        }
    }

        if(exception instanceof MaxUploadSizeExceededException) {
        //If (exception instanceof FileUploadBase.SizeLimitExceededException)
            String errorMessage = "ERROR: Filesize exceeded.");
            HashMap<String, Object> model = new HashMap<String, Object>();
            model.put("errorMessage", errorMessage);
            return new ModelAndView("jsp/uploadView", model);
        } else {
            return super.resolveException(request, response, handler, exception); 
        }
    }

myObject.setFileUpload(null);

private transient CommonsMultipartFile fileUpload;