jsf - uploadFile.getInputstream() 抛出 java.nio.file.NoSuchFileException

标签 jsf file-upload primefaces wildfly

我使用 JSF 2.2 和 Primefaces 5.3。我想将上传的文件保存在磁盘上。下面你可以看到我是如何尝试做到这一点的。当我推送 Send按钮我得到一个 java.nio.file.NoSuchFileException异常(在我的帖子末尾我还放了一个完整的堆栈跟踪):

ERROR [stderr] (default task-24) java.nio.file.NoSuchFileException: [PATH]\Wildfly_10\WILDFLY_HOME\standalone\tmp\MasterProject.war\undertow1357918758070690245upload



当我跟踪堆栈跟踪时，我看到异常是由这一行引起的(我认为是这样):
try(InputStream input = uploadFile.getInputstream()){
这对我来说很奇怪。我可以获得上传文件的名称(通过 uploadFile.getFileName() )但我无法获得文件的大小(通过 uploadFile.getSize() )并且我无法获得 InputStream (作者 uploadFile.getInputstream())。在这两种情况下，我都得到了 NoSuchFileException异常(exception)。

附加信息:我必须上传大文件(即 200 MB 或更多)。当然，当我上传小文件时，我得到了同样的异常(exception)。

您知道为什么我会遇到此异常以及如何解决此问题吗？

这是我上传文件的页面的一部分:
<h:form>
    <p:growl id="messages" showDetail="true" />
    <p:panelGrid id="panel" columns="2" styleClass="ui-noborder" columnClasses="rightalign,leftalign">

        <p:outputLabel for="file" value="File:" />
        <p:fileUpload id="file" fileLimit="1"
                    fileUploadListener="#{dataController.handleFileUpload}" 
                    mode="advanced" dragDropSupport="true" sizeLimit="1000000000" 
                    uploadLabel="Upload" cancelLabel="Delete" allowTypes="/(\.|\/)(csv|binetflow)$/" />                                             
        <p:commandButton id="buttonSend" value="Send" 
                        action="#{dataController.send()}" update="messages"/>                       

    </p:panelGrid>                                              
</h:form>

这是 CDI bean，它是上述页面的 Controller :
@Named
@ViewScoped
public class DataController implements Serializable {

    private static final long serialVersionUID = 1383572529241805730L;

    public void handleFileUpload(FileUploadEvent event){

        uploadFile=event.getFile(); 

        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Successful", event.getFile().getFileName() + " is uploaded"));
    }

    public void send(){

        try(InputStream input = uploadFile.getInputstream()){

            Path folder=Paths.get("F:/Files");
            String filename = FilenameUtils.getBaseName(uploadFile.getFileName()); 
            String extension = FilenameUtils.getExtension(uploadFile.getFileName());
            Path file = Files.createTempFile(folder, filename + "-", "." + extension);
            Files.copy(input, file, StandardCopyOption.REPLACE_EXISTING);

            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Successful", "Uploaded file successfully saved in " + file));          

        } catch (IOException e1) {
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "ERROR", null));
            e1.printStackTrace();
        }   
    }

    private UploadedFile uploadFile;
}

这是完整的堆栈跟踪:
10:40:45,822 ERROR [stderr] (default task-24) java.nio.file.NoSuchFileException: [PATH]\Wildfly_10\WILDFLY_HOME\standalone\tmp\MasterProject.war\undertow1357918758070690245upload

10:40:45,823 ERROR [stderr] (default task-24)   at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:79)

10:40:45,823 ERROR [stderr] (default task-24)   at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)

10:40:45,823 ERROR [stderr] (default task-24)   at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)

10:40:45,823 ERROR [stderr] (default task-24)   at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(WindowsFileSystemProvider.java:230)

10:40:45,823 ERROR [stderr] (default task-24)   at java.nio.file.Files.newByteChannel(Files.java:361)

10:40:45,824 ERROR [stderr] (default task-24)   at java.nio.file.Files.newByteChannel(Files.java:407)

10:40:45,824 ERROR [stderr] (default task-24)   at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:384)

10:40:45,824 ERROR [stderr] (default task-24)   at java.nio.file.Files.newInputStream(Files.java:152)

10:40:45,824 ERROR [stderr] (default task-24)   at io.undertow.servlet.spec.PartImpl.getInputStream(PartImpl.java:63)

10:40:45,824 ERROR [stderr] (default task-24)   at org.primefaces.model.NativeUploadedFile.getInputstream(NativeUploadedFile.java:45)

10:40:45,824 ERROR [stderr] (default task-24)   at com.system.controller.DataController.send(DataController.java:163)

10:40:45,824 ERROR [stderr] (default task-24)   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

10:40:45,825 ERROR [stderr] (default task-24)   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

10:40:45,825 ERROR [stderr] (default task-24)   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

10:40:45,825 ERROR [stderr] (default task-24)   at java.lang.reflect.Method.invoke(Method.java:498)

10:40:45,825 ERROR [stderr] (default task-24)   at javax.el.ELUtil.invokeMethod(ELUtil.java:308)

10:40:45,825 ERROR [stderr] (default task-24)   at javax.el.BeanELResolver.invoke(BeanELResolver.java:415)

10:40:45,825 ERROR [stderr] (default task-24)   at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256)

10:40:45,825 ERROR [stderr] (default task-24)   at com.sun.el.parser.AstValue.invoke(AstValue.java:285)

10:40:45,825 ERROR [stderr] (default task-24)   at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)

10:40:45,826 ERROR [stderr] (default task-24)   at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)

10:40:45,826 ERROR [stderr] (default task-24)   at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)

10:40:45,826 ERROR [stderr] (default task-24)   at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)

10:40:45,826 ERROR [stderr] (default task-24)   at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)

10:40:45,826 ERROR [stderr] (default task-24)   at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)

10:40:45,826 ERROR [stderr] (default task-24)   at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)

10:40:45,826 ERROR [stderr] (default task-24)   at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)

10:40:45,827 ERROR [stderr] (default task-24)   at javax.faces.component.UICommand.broadcast(UICommand.java:315)

10:40:45,827 ERROR [stderr] (default task-24)   at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)

10:40:45,827 ERROR [stderr] (default task-24)   at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)

10:40:45,827 ERROR [stderr] (default task-24)   at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)

10:40:45,827 ERROR [stderr] (default task-24)   at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

10:40:45,827 ERROR [stderr] (default task-24)   at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)

10:40:45,828 ERROR [stderr] (default task-24)   at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)

10:40:45,828 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)

10:40:45,828 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)

10:40:45,828 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)

10:40:45,829 ERROR [stderr] (default task-24)   at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)

10:40:45,829 ERROR [stderr] (default task-24)   at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

10:40:45,829 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)

10:40:45,829 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)

10:40:45,829 ERROR [stderr] (default task-24)   at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

10:40:45,830 ERROR [stderr] (default task-24)   at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)

10:40:45,830 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)

10:40:45,830 ERROR [stderr] (default task-24)   at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)

10:40:45,830 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)

10:40:45,831 ERROR [stderr] (default task-24)   at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)

10:40:45,831 ERROR [stderr] (default task-24)   at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)

10:40:45,831 ERROR [stderr] (default task-24)   at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

10:40:45,831 ERROR [stderr] (default task-24)   at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)

10:40:45,831 ERROR [stderr] (default task-24)   at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

10:40:45,832 ERROR [stderr] (default task-24)   at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

10:40:45,832 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)

10:40:45,832 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)

10:40:45,832 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)

10:40:45,833 ERROR [stderr] (default task-24)   at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)

10:40:45,833 ERROR [stderr] (default task-24)   at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)

10:40:45,833 ERROR [stderr] (default task-24)   at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)

10:40:45,833 ERROR [stderr] (default task-24)   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

10:40:45,833 ERROR [stderr] (default task-24)   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

10:40:45,834 ERROR [stderr] (default task-24)   at java.lang.Thread.run(Thread.java:745)

更新:

我注意到了一些新东西。如果我移动 send() 的内容方法到 handleFileUpload()方法(下面的代码) - 文件保存在磁盘上:
@Named
@ViewScoped
public class DataController implements Serializable {

    private static final long serialVersionUID = 1383572529241805730L;

    public void handleFileUpload(FileUploadEvent event){

        uploadFile=event.getFile(); 

        try(InputStream input = uploadFile.getInputstream()){

            Path folder=Paths.get("F:/Files");
            String filename = FilenameUtils.getBaseName(uploadFile.getFileName()); 
            String extension = FilenameUtils.getExtension(uploadFile.getFileName());
            Path file = Files.createTempFile(folder, filename + "-", "." + extension);
            Files.copy(input, file, StandardCopyOption.REPLACE_EXISTING);

            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Successful", "Uploaded file successfully saved in " + file));          

        } catch (IOException e1) {
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "ERROR", null));
            e1.printStackTrace();
        }

        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Successful", event.getFile().getFileName() + " is uploaded"));
    }

    public void send(){

    }

    private UploadedFile uploadFile;
}

但是如果用户推送Send，我想将上传的文件保存在磁盘上。按钮，而不是更早的(即不是在用户按下 Upload 按钮时)，因此有必要将文件保存在 send() 中方法。

我还注意到，当我使用 <p:fileUpload> 的简单模式时组件(下面的修改形式)，一切正常(即当用户按下按钮时文件被保存)。我必须为 uploadFile 创建 getter 和 setter DataController 中的对象要使用的 bean #{dataController.uploadFile} .我不得不添加 enctype="multipart/form-data"归因于 <h:form>组件(没有这个属性就行不通)。
<h:form enctype="multipart/form-data">
    <p:growl id="messages" showDetail="true" />
    <p:panelGrid id="panel" columns="2" styleClass="ui-noborder" columnClasses="rightalign,leftalign">

        <p:outputLabel for="file" value="File:" />
        <p:fileUpload id="file" value="#{dataController.uploadFile}" mode="simple" skinSimple="true" sizeLimit="1000000000" allowTypes="/(\.|\/)(csv|binetflow)$/"/>
        <p:commandButton value="Submit" ajax="false" actionListener="#{dataController.send()}" disabled="false" />                                                                                                                                          

    </p:panelGrid>                                              
</h:form>

这个解决方案的问题是:我需要<p:fileUpload>的高级模式成分。

我不明白为什么我无法访问 send() 中上传的文件使用高级模式时的方法。我使用 @ViewScoped范围所以它应该工作。

最佳答案

uploadFile.getInputstream() throws java.nio.file.NoSuchFileException



您的具体问题是因为您试图读取在先前请求中上传的上传文件。当 HTTP 请求完成时，一个体面的容器将清除与 HTTP 请求相关的所有临时数据。这显然也涵盖了 WildFly 的非读取上传文件(但不确定其他人的行为如何)。

最好的办法是直接保存它们，如有必要，保存在某个临时位置。然后，在最后的操作方法中，将它们移动/重命名为所需的永久位置/名称。为了清除“忘记”的文件，以防最终用户在上传一堆文件后从未调用最终操作方法，最好的办法是跟踪所有这些 File s 在 session 范围的 bean 中并执行 file.delete()在 @PreDestroy注释的方法。一个具体的例子可以在这里找到:How to handle and delete "forgotten" uploaded files?

如果上传表单是 View 范围的，并且您使用的是 OmniFaces，那么您也可以使用 OmniFaces CDI @ViewScoped 谁的@PreDestroy当用户通过导航或关闭选项卡/窗口卸载页面时，将已经运行。

关于jsf - uploadFile.getInputstream() 抛出 java.nio.file.NoSuchFileException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36496336/

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