Convertire un file caricato in un file

Question

Uso PrimeFaces 3.2 e dovrei memorizzare un file sul filesystem. Ora, so che la classe FileUploaded crea un file temporaneo quindi lo convertirò in un file reale usando java.io.File.

Qui è il mio codice:

String fileName = "D:/upload/file.zip"; //--- this is an example, in my real code it is dynamic 
UploadedFile uploadedFile; 

//--- getters and setters 
InputStream in = uploadedFile.getInputStream(); 
OutputStream out = new FileOutputStream(new File(fileName)); 

int read = 0; 
byte[] bytes = new byte[1024]; 

while ((read = in.read(bytes)) != -1) { 
    out.write(bytes, 0, read); 
} 

in.close(); 
out.flush(); 
out.close(); 

Il problema è che nella cartella dell'applicazione creare un file TMP, ma dopo non è "convertire" al file che voglio! I rendimenti di registro:

[#|2012-04-20T16:30:13.109+0200|SEVERE|glassfish3.1.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=114;_ThreadName=Thread-2;|java.io.FileNotFoundException: D:\upload\file.zip (Impossibile trovare il percorso specificato) 
    at java.io.FileOutputStream.open(Native Method) 
    at java.io.FileOutputStream.<init>(FileOutputStream.java:212) 
    at java.io.FileOutputStream.<init>(FileOutputStream.java:165) 
    at it.cyborg.cdg.jsfClasses.AbstractController.copyFile(AbstractController.java:240) 
    at it.cyborg.cdg.jsfClasses.ProgettiController.create(ProgettiController.java:223) 
    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 com.sun.el.parser.AstValue.invoke(AstValue.java:234) 
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) 
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) 
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) 
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:315) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) 
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at it.cyborg.cdg.logic.RolesFilter.doFilter(RolesFilter.java:122) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) 
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
    at java.lang.Thread.run(Thread.java:722) 
|#] 

ho provato anche questa soluzione:

How to get java.io.File from Apache's UploadedFile class?

ma ho ricevuto lo stesso errore. Grazie per il vostro aiuto!

Answer 1

Ho incontrato il problema simile prima, è molto semplice, è sufficiente creare un nuovo file per questo. Ma in primo luogo, dovresti confermare che il percorso che vuoi scrivere sia disponibile. Ecco il codice di esempio

//This is used for new file creation. 
File f = new File(ParentPath, FileName); 
FileOutputStream fos = new FileOutputStream(f); 

o si può semplicemente utilizzare java.nio.Files per esso.

Files.newOutputStream(path, options); 

Si prega di verificare javadoc per esso.

Answer 2

È inoltre possibile utilizzare questo codice per convertire un file caricato in un file java.

File f = new File(uploadedFile.getFileName()); 

Answer 3

try { 
      moveFile(file.getInputstream(), file.getFileName()); 
     } catch (IOException e1) { 
      System.out.println(e1); 
     } 


private Boolean moveFile(InputStream inputStream, String name) { 

    OutputStream outputStream = null; 
    String path = "/Users/barry/Desktop/"; 
    Boolean flag = false; 
    try { 

     outputStream 
       = new FileOutputStream(new File(path + name)); 

     int read = 0; 
     byte[] bytes = new byte[1024]; 

     while ((read = inputStream.read(bytes)) != -1) { 
      outputStream.write(bytes, 0, read); 
     } 

     System.out.println("Done!"); 
     flag = true; 
    } catch (IOException e) { 
     flag = false; 
    } finally { 
     if (inputStream != null) { 
      try { 
       inputStream.close(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     if (outputStream != null) { 
      try { 
       // outputStream.flush(); 
       outputStream.close(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 

     } 
    } 
    return flag; 
}