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FileNotFoundException在Wicket中上載多文件

2013-05-03 27 views
0

我們使用Wicket 6+並在FileUpload.writeTo（file）上出現奇怪的錯誤。 它只發生在某些類型的文件（docx，xl​​sx，java）上，只能以一種形式出現。相同的確切代碼可以在其他地方很好地附加文件。任何幫助？謝謝。FileNotFoundException在Wicket中上載多文件

HTML：

<div wicket:id="filesInput"/>

的Java：

add(new org.apache.wicket.markup.html.form.upload.MultiFileUploadField("filesInput", 
        new PropertyModel<Collection<FileUpload>>(this, "uploads"), 5));

會發生錯誤就行fileUpload.writeTo（文件）;當從窗體onSubmit調用。

private void writeToFile(FileUpload fileUpload, Attachment attachment) { 
    if (fileUpload == null) { 
     return; 
    } 
    File file = AttachmentUtils.getFile(attachment, jtracHome); 
    try { 
     fileUpload.writeTo(file); 
    } 
    catch (Exception e) { 
     throw new RuntimeException(e); 
    } 
}

錯誤日誌：

2013-05-03 12:57:23,731 [http-bio-8084-exec-9] ERROR [org.apache.wicket.DefaultExceptionMapper] - Unexpected error occurred 
org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of interface org.apache.wicket.markup.html.form.IFormSubmitListener targeted at [SpaceItemViewForm [Component id = form]] on component [SpaceItemViewForm [Component id = form]] threw an exception 
    at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:268) 
    at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216) 
    at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:240) 
    at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226) 
    at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:840) 
    at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) 
    at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:254) 
    at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:211) 
    at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:282) 
    at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:244) 
    at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) 
    at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:267) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75) 
    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:225) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
    at java.lang.Thread.run(Thread.java:722) 
Caused by: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258) 
    ... 31 more 
Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\aeb\AppData\Roaming\NetBeans\7.2.1\apache-tomcat-7.0.27.0_base\temp\upload_9108b655_6177_4450_8e82_a767f101dd40_1997755963.tmp (The system cannot find the file specified) 
    at info.jtrac.JtracImpl.writeToFile(JtracImpl.java:405) 
    at info.jtrac.JtracImpl.storeScopeOfWork(JtracImpl.java:2053) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:301) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198) 
    at $Proxy11.storeScopeOfWork(Unknown Source) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:301) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
    at $Proxy12.storeScopeOfWork(Unknown Source) 
    at info.jtrac.wicket.SpaceItemViewFormPanel$SpaceItemViewForm.onSubmit(SpaceItemViewFormPanel.java:433) 
    at org.apache.wicket.markup.html.form.Form$9.component(Form.java:1246) 
    at org.apache.wicket.markup.html.form.Form$9.component(Form.java:1240) 
    at org.apache.wicket.util.visit.Visits.visitPostOrderHelper(Visits.java:274) 
    at org.apache.wicket.util.visit.Visits.visitPostOrder(Visits.java:245) 
    at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1239) 
    at org.apache.wicket.markup.html.form.Form.process(Form.java:921) 
    at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:767) 
    at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:700) 
    ... 36 more 
Caused by: java.io.FileNotFoundException: C:\Users\aib\AppData\Roaming\NetBeans\7.2.1\apache-tomcat-7.0.27.0_base\temp\upload_9108b655_6177_4450_8e82_a767f101dd40_1997755963.tmp (The system cannot find the file specified) 
    at java.io.FileInputStream.open(Native Method) 
    at java.io.FileInputStream.<init>(FileInputStream.java:138) 
    at org.apache.wicket.util.upload.DiskFileItem.write(DiskFileItem.java:439) 
    at org.apache.wicket.markup.html.form.upload.FileUpload.writeTo(FileUpload.java:234) 
    at info.jtrac.JtracImpl.writeToFile(JtracImpl.java:402)

來源

2013-05-03 nekto

回答

1

因此，這是例外是來自碼：

if (!outputFile.renameTo(file)) 
     { 
      BufferedInputStream in = null; 
      BufferedOutputStream out = null; 
      try 
      { 
       in = new BufferedInputStream(new FileInputStream(outputFile)); 
       out = new BufferedOutputStream(new FileOutputStream(file)); 
       Streams.copy(in, out); 
      } 
      finally 
      { 
       IOUtils.closeQuietly(in); 
       IOUtils.closeQuietly(out); 
      } 
     }

的javadoc：

這種方法只保證工作一次，它第一次被調用一個 特定項目。這是因爲，如果方法重命名臨時文件，那麼 文件將不再可用於稍後複製或重新命名。

異常來自「outputFile」文件的打開 - 就好像它不在那裏一樣。 renameTo是否有可能對文件執行某些操作，但renameTo方法仍然返回false？你可以在那裏設置一個斷點，看看發生了什麼？也許你不知道怎麼叫它兩次？

從renameTo的Javadoc：

這種方法的行爲的許多方面是天生 平臺依賴性：重命名操作可能無法從一個文件系統移動 文件到另一個，它可能不是原子的，如果目標抽象路徑名爲 的文件已存在，則它可能不會成功。應始終檢查返回值以確保 重命名操作成功。

來源

2013-05-09 22:19:26 cserepj

+0

cserepj，非常感謝！它解決了這個問題。我試圖用兩個不同的對象存儲相同的文件列表。 – nekto 2013-05-10 15:15:16

0

我只是跑了wicket MultiUploadPage example和一切工作。 給我們提供關於你的頁面結構的更多細節，你的頁面有什麼不同？

WicketApplication.java

public class WicketApplication extends WebApplication { 

    private Folder uploadFolder = null; 

    @Override 
    public Class<? extends WebPage> getHomePage(){ 
     return HomePage.class; 
    } 

    public Folder getUploadFolder(){ 
     return uploadFolder; 
    } 

    @Override 
    public void init(){ 
     super.init(); 
     getResourceSettings().setThrowExceptionOnMissingResource(false); 
     uploadFolder = new Folder(System.getProperty("java.io.tmpdir"), "wicket-uploads"); 
     uploadFolder.mkdirs(); 
     getApplicationSettings().setUploadProgressUpdatesEnabled(true); 
    } 
}

HomePage.java

public class HomePage extends WebPage { 

private static final long serialVersionUID = 1L; 
private final FileListView fileListView; 

public HomePage(final PageParameters parameters){ 
    Folder uploadFolder = getUploadFolder(); 

    final FeedbackPanel uploadFeedback = new FeedbackPanel("uploadFeedback"); 
    add(uploadFeedback); 

    final FileUploadForm simpleUploadForm = new FileUploadForm("simpleUpload"); 
    add(simpleUploadForm); 

    add(new Label("dir", uploadFolder.getAbsolutePath())); 
    fileListView = new FileListView("fileList", new LoadableDetachableModel<List<File>>(){ 

     private static final long serialVersionUID = 1L; 

     @Override 
     protected List<File> load(){ 
      return Arrays.asList(getUploadFolder().listFiles()); 
     } 
    }); 
    add(fileListView); 
} 

private class FileListView extends ListView<File>{ 
    private static final long serialVersionUID = 1L; 

    public FileListView(String name, final IModel<List<File>> files){ 
     super(name, files); 
    } 

    @Override 
    protected void populateItem(ListItem<File> listItem){ 
     final File file = listItem.getModelObject(); 
     listItem.add(new Label("file", file.getName())); 
     listItem.add(new Link<Void>("delete"){ 
      private static final long serialVersionUID = 1L; 

      @Override 
      public void onClick(){ 
       Files.remove(file); 
       info("Deleted " + file); 
      } 
     }); 
    } 
} 

private class FileUploadForm extends Form<Void>{ 
    private static final long serialVersionUID = 1L; 
    private final Collection<FileUpload> uploads = new ArrayList<FileUpload>(); 

    public FileUploadForm(String name){ 
     super(name); 
     setMultiPart(true); 
     add(new MultiFileUploadField("fileInput", new PropertyModel<Collection<FileUpload>>(this, "uploads"), 5, true)); 
     setMaxSize(Bytes.kilobytes(100000)); 
    } 

    @Override 
    protected void onSubmit(){ 
     for (FileUpload upload : uploads){ 
      File newFile = new File(getUploadFolder(), upload.getClientFileName()); 
      try{ 
       newFile.createNewFile(); 
       upload.writeTo(newFile); 
       HomePage.this.info("saved file: " + upload.getClientFileName()); 
      } catch (Exception e){ 
       throw new IllegalStateException("Unable to write file"); 
      } 
     } 
    } 
} 

private Folder getUploadFolder(){ 
    return ((WicketApplication) Application.get()).getUploadFolder(); 
}

}

HomePage.html

<!DOCTYPE html> 
<html xmlns:wicket="http://wicket.apache.org"> 
    <head> 
     <meta charset="utf-8" /> 
     <title>Apache Wicket Quickstart</title> 
     <link rel="stylesheet" href="style.css" type="text/css" media="screen" title="Stylesheet" /> 
    </head> 
    <body> 
     The multi upload field is based on javascript found 
     <a target="_blank" href="http://the-stickman.com/web-development/javascript/upload-multiple-files-with-a-single-file-element/">here</a>. 
     <br /> 
     <br /> Wicket can also handle file uploads via AJAX, please see AJAX 
     examples section. AJAX Functionality is not included in this example to 
     keep things simple. 
     <br /> 
     <br /> 

     <form wicket:id="simpleUpload"> 
      <fieldset> 
       <legend>Upload form</legend> 
       <p> 
       <div wicket:id="fileInput" class="mfuex" /> 
       </p> 
       <input type="submit" value="Upload!" /> 
      </fieldset> 
     </form> 

     <div><span wicket:id="uploadFeedback" /></div> 

     <div> 
      <h4>Current files in <span wicket:id="dir">(dir)</span>:</h4> 
      <table> 
       <tr wicket:id="fileList"> 
        <td width="200"><span wicket:id="file">(file)</span></td> 
        <td><a href="#" wicket:id="delete"><img src="delete.gif" border="0" /></a></td> 
       </tr> 
      </table> 
     </div> 
    </body> 
</html>

來源

2013-05-09 11:42:18

+0

謝謝您的回覆。我試圖找到我的代碼中有什麼不同。我也發現同一個物體在另一個地方工作得很好。我可能在設置它的時候錯過了一些東西。我會盡快發佈更多細節。 – nekto 2013-05-09 20:13:22

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