problem with uploading file

[irakli_dev]

i want to do upload file in my app and i took this example
Uploading Files in a Visual Web JSF Application - NetBeans IDE 6.5 Tutorial
but after uploadedFile.write(file); i getting null pont exception but i have file name choosen
anyone can help me?

[Eranga]

Can you show us the complete error you comes with?

[irakli_dev]

try {
                File file = new File(this.realImageFilePath);
                uploadedFile.write(file);
            } catch (Exception ex) {    
                error("Cannot upload file: " + justFileName);
            }

there appears ex=(java.lang.NullPointerException) java.lang.NullPointerException

[Eranga]

That is not the complete error you end with. There should be more. If you have look at the error message carefully you can see line number where your error picks.

[irakli_dev]

Description: An unhandled exception occurred during the execution of the web application. Please review the following stack trace for more information regarding the error.

Exception Details: java.lang.NullPointerException
null

Possible Source of Error:
Class Name: com.sun.webui.jsf.util.UploadFilterFileItem
File Name: UploadFilterFileItem.java
Method Name: write
Line Number: 459

Source not available. Information regarding the location of the exception can be identified using the exception stack trace below.


Stack Trace:

com.sun.webui.jsf.util.UploadFilterFileItem.write( UploadFilterFileItem.java:459)
com.sun.webui.jsf.component.Upload$UploadedFileImp l.write(Upload.java:435)
fileuploadexample.Page1.uploadFileButton_action(Pa ge1.java:280)
sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ eMethodAccessorImpl.java:-2)
sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.sun.el.parser.AstValue.invoke(AstValue.java:18 7)
com.sun.el.MethodExpressionImpl.invoke(MethodExpre ssionImpl.java:297)
javax.faces.component.MethodBindingMethodExpressio nAdapter.invoke(MethodBindingMethodExpressionAdapt er.java:77)
com.sun.faces.application.ActionListenerImpl.proce ssAction(ActionListenerImpl.java:91)
com.sun.rave.web.ui.appbase.faces.ActionListenerIm pl.processAction(ActionListenerImpl.java:91)
javax.faces.component.UICommand.broadcast(UIComman d.java:383)
com.sun.webui.jsf.component.WebuiCommand.broadcast (WebuiCommand.java:160)
javax.faces.component.UIViewRoot.broadcastEvents(U IViewRoot.java:447)
javax.faces.component.UIViewRoot.processApplicatio n(UIViewRoot.java:752)
com.sun.faces.lifecycle.InvokeApplicationPhase.exe cute(InvokeApplicationPhase.java:97)
com.sun.faces.lifecycle.LifecycleImpl.phase(Lifecy cleImpl.java:251)
com.sun.faces.lifecycle.LifecycleImpl.execute(Life cycleImpl.java:117)
com.sun.faces.extensions.avatar.lifecycle.PartialT raversalLifecycle.execute(PartialTraversalLifecycl e.java:94)
javax.faces.webapp.FacesServlet.service(FacesServl et.java:244)
org.apache.catalina.core.ApplicationFilterChain.se rvletService(ApplicationFilterChain.java:427)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:333)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
com.sun.webui.jsf.util.UploadFilter.doFilter(Uploa dFilter.java:370)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:246)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:313)
org.apache.catalina.core.StandardContextValve.invo keInternal(StandardContextValve.java:287)
org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:218)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
com.sun.enterprise.web.WebPipeline.invoke(WebPipel ine.java:94)
com.sun.enterprise.web.PESessionLockingStandardPip eline.invoke(PESessionLockingStandardPipeline.java :98)
org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:222)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:166)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.coyote.tomcat5.CoyoteAdapter.service(Co yoteAdapter.java:288)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.invokeAdapter(DefaultProcessorTask.jav a:647)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.doProcess(DefaultProcessorTask.java:57 9)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.process(DefaultProcessorTask.java:831)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.executeProcessorTask(DefaultReadTask.java:3 41)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:263)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:214)
com.sun.enterprise.web.connector.grizzly.TaskBase. run(TaskBase.java:265)
com.sun.enterprise.web.connector.grizzly.ssl.SSLWo rkerThread.run(SSLWorkerThread.java:106)


Exception Details: javax.faces.el.EvaluationException
java.lang.NullPointerException

Possible Source of Error:
Class Name: javax.faces.component.MethodBindingMethodExpressio nAdapter
File Name: MethodBindingMethodExpressionAdapter.java
Method Name: invoke
Line Number: 91

Source not available. Information regarding the location of the exception can be identified using the exception stack trace below.


Stack Trace:

javax.faces.component.MethodBindingMethodExpressio nAdapter.invoke(MethodBindingMethodExpressionAdapt er.java:91)
com.sun.faces.application.ActionListenerImpl.proce ssAction(ActionListenerImpl.java:91)
com.sun.rave.web.ui.appbase.faces.ActionListenerIm pl.processAction(ActionListenerImpl.java:91)
javax.faces.component.UICommand.broadcast(UIComman d.java:383)
com.sun.webui.jsf.component.WebuiCommand.broadcast (WebuiCommand.java:160)
javax.faces.component.UIViewRoot.broadcastEvents(U IViewRoot.java:447)
javax.faces.component.UIViewRoot.processApplicatio n(UIViewRoot.java:752)
com.sun.faces.lifecycle.InvokeApplicationPhase.exe cute(InvokeApplicationPhase.java:97)
com.sun.faces.lifecycle.LifecycleImpl.phase(Lifecy cleImpl.java:251)
com.sun.faces.lifecycle.LifecycleImpl.execute(Life cycleImpl.java:117)
com.sun.faces.extensions.avatar.lifecycle.PartialT raversalLifecycle.execute(PartialTraversalLifecycl e.java:94)
javax.faces.webapp.FacesServlet.service(FacesServl et.java:244)
org.apache.catalina.core.ApplicationFilterChain.se rvletService(ApplicationFilterChain.java:427)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:333)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
com.sun.webui.jsf.util.UploadFilter.doFilter(Uploa dFilter.java:370)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:246)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:313)
org.apache.catalina.core.StandardContextValve.invo keInternal(StandardContextValve.java:287)
org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:218)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
com.sun.enterprise.web.WebPipeline.invoke(WebPipel ine.java:94)
com.sun.enterprise.web.PESessionLockingStandardPip eline.invoke(PESessionLockingStandardPipeline.java :98)
org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:222)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:166)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.coyote.tomcat5.CoyoteAdapter.service(Co yoteAdapter.java:288)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.invokeAdapter(DefaultProcessorTask.jav a:647)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.doProcess(DefaultProcessorTask.java:57 9)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.process(DefaultProcessorTask.java:831)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.executeProcessorTask(DefaultReadTask.java:3 41)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:263)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:214)
com.sun.enterprise.web.connector.grizzly.TaskBase. run(TaskBase.java:265)
com.sun.enterprise.web.connector.grizzly.ssl.SSLWo rkerThread.run(SSLWorkerThread.java:106)


Exception Details: javax.faces.FacesException
#{Page1.uploadFileButton_action}: java.lang.NullPointerException

Possible Source of Error:
Class Name: com.sun.faces.application.ActionListenerImpl
File Name: ActionListenerImpl.java
Method Name: processAction
Line Number: 107

Source not available. Information regarding the location of the exception can be identified using the exception stack trace below.


Stack Trace:

com.sun.faces.application.ActionListenerImpl.proce ssAction(ActionListenerImpl.java:107)
com.sun.rave.web.ui.appbase.faces.ActionListenerIm pl.processAction(ActionListenerImpl.java:91)
javax.faces.component.UICommand.broadcast(UIComman d.java:383)
com.sun.webui.jsf.component.WebuiCommand.broadcast (WebuiCommand.java:160)
javax.faces.component.UIViewRoot.broadcastEvents(U IViewRoot.java:447)
javax.faces.component.UIViewRoot.processApplicatio n(UIViewRoot.java:752)
com.sun.faces.lifecycle.InvokeApplicationPhase.exe cute(InvokeApplicationPhase.java:97)
com.sun.faces.lifecycle.LifecycleImpl.phase(Lifecy cleImpl.java:251)
com.sun.faces.lifecycle.LifecycleImpl.execute(Life cycleImpl.java:117)
com.sun.faces.extensions.avatar.lifecycle.PartialT raversalLifecycle.execute(PartialTraversalLifecycl e.java:94)
javax.faces.webapp.FacesServlet.service(FacesServl et.java:244)
org.apache.catalina.core.ApplicationFilterChain.se rvletService(ApplicationFilterChain.java:427)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:333)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
com.sun.webui.jsf.util.UploadFilter.doFilter(Uploa dFilter.java:370)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:246)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:313)
org.apache.catalina.core.StandardContextValve.invo keInternal(StandardContextValve.java:287)
org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:218)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
com.sun.enterprise.web.WebPipeline.invoke(WebPipel ine.java:94)
com.sun.enterprise.web.PESessionLockingStandardPip eline.invoke(PESessionLockingStandardPipeline.java :98)
org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:222)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:166)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.coyote.tomcat5.CoyoteAdapter.service(Co yoteAdapter.java:288)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.invokeAdapter(DefaultProcessorTask.jav a:647)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.doProcess(DefaultProcessorTask.java:57 9)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.process(DefaultProcessorTask.java:831)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.executeProcessorTask(DefaultReadTask.java:3 41)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:263)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:214)
com.sun.enterprise.web.connector.grizzly.TaskBase. run(TaskBase.java:265)
com.sun.enterprise.web.connector.grizzly.ssl.SSLWo rkerThread.run(SSLWorkerThread.java:106)


Exception Details: com.sun.rave.web.ui.appbase.ApplicationException
#{Page1.uploadFileButton_action}: java.lang.NullPointerException

Possible Source of Error:
Class Name: com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl
File Name: ViewHandlerImpl.java
Method Name: cleanup
Line Number: 603

Source not available. Information regarding the location of the exception can be identified using the exception stack trace below.


Stack Trace:

com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl. cleanup(ViewHandlerImpl.java:603)
com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl. renderView(ViewHandlerImpl.java:311)
com.sun.faces.lifecycle.RenderResponsePhase.execut e(RenderResponsePhase.java:106)
com.sun.faces.lifecycle.LifecycleImpl.phase(Lifecy cleImpl.java:251)
com.sun.faces.lifecycle.LifecycleImpl.render(Lifec ycleImpl.java:144)
com.sun.faces.extensions.avatar.lifecycle.PartialT raversalLifecycle.render(PartialTraversalLifecycle .java:106)
javax.faces.webapp.FacesServlet.service(FacesServl et.java:245)
org.apache.catalina.core.ApplicationFilterChain.se rvletService(ApplicationFilterChain.java:427)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:333)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
com.sun.webui.jsf.util.UploadFilter.doFilter(Uploa dFilter.java:370)
org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:246)
org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:214)
org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:313)
org.apache.catalina.core.StandardContextValve.invo keInternal(StandardContextValve.java:287)
org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:218)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
com.sun.enterprise.web.WebPipeline.invoke(WebPipel ine.java:94)
com.sun.enterprise.web.PESessionLockingStandardPip eline.invoke(PESessionLockingStandardPipeline.java :98)
org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:222)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:166)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke (StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:1096)
org.apache.coyote.tomcat5.CoyoteAdapter.service(Co yoteAdapter.java:288)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.invokeAdapter(DefaultProcessorTask.jav a:647)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.doProcess(DefaultProcessorTask.java:57 9)
com.sun.enterprise.web.connector.grizzly.DefaultPr ocessorTask.process(DefaultProcessorTask.java:831)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.executeProcessorTask(DefaultReadTask.java:3 41)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:263)
com.sun.enterprise.web.connector.grizzly.DefaultRe adTask.doTask(DefaultReadTask.java:214)
com.sun.enterprise.web.connector.grizzly.TaskBase. run(TaskBase.java:265)
com.sun.enterprise.web.connector.grizzly.ssl.SSLWo rkerThread.run(SSLWorkerThread.java:106)

[irakli_dev]

so, haven't u found solusion on this problem?

[Tolls]

This is the relevant code from UploadFilterFileItem:

                if (!outputFile.renameTo(file)) {
                    BufferedInputStream in = null;
                    BufferedOutputStream out = null;
                    try {
                        in = new BufferedInputStream(
                            new FileInputStream(outputFile));
                        out = new BufferedOutputStream(
                                new FileOutputStream(file));
                        byte[] bytes = new byte[2048];
                        int s = 0;
                        while ((s = in.read(bytes)) != -1) {
                            out.write(bytes, 0, s);
                        }
                    } finally {
                        try {
                            in.close();
                        } catch (IOException e) {
                            // ignore
                        }
                        try {
                            out.close();
                        } catch (IOException e) {
                            // ignore
                        }
                    }
                }

The out.close is where the exception is coming from, which implies that out is null.
I don't like the lack of checking for nulls in that catch block as it is eating the underlying exception.
I suspect it is that out has failed to initialise, throwing an IOException, which implies there's something up with your destination location for the file.

ETA: The quickest way to find out what is to try and open a BufferedOutputStream to that file (as in the code above) and see what exception you get.

[Eranga]

so, haven't u found solusion on this problem?

Have a look what Tolls suggest and let us know.

[irakli_dev]

how to initializate outputFile and if u can explain why i can't use file instead of outputFile?

[Tolls]

Write code to check your destination File object is correct.
Try and write something to that destination...anything.
Instead of this:

File file = new File(this.realImageFilePath);
uploadedFile.write(file);

do this:

File file = new File(this.realImageFilePath);
BufferedOutputStream out = null;
try {
    out = new BufferedOutputStream(new FileOutputStream(file));
    out.write(1);
} catch (IOException ex) {
    ex.printStackTrace();
} finally {
    if (out != null) out.close();
}

Something like that, and check you can write to that file.

[irakli_dev]

Tolls
out = new BufferedOutputStream(new FileOutputStream(file)); getting exception
Exception Details: java.io.FileNotFoundException
D:\My documents\NBProjects\netbeans 6.5 examples\FileUploadExample\build\web\resources\ima ge-file (Access is denied)
but when i wrote the pass in window its opening, so i dont guess whats problem

[Tolls]

"Access is denied" implies a privileges thing.
So for some reason your code is not allowed to write to that location.
Can the user you are executing this as create a file in that directory?

[irakli_dev]

manuallly i can create file in this folder

[Tolls]

Yes, but are you the same user?
How are you running this?

[irakli_dev]

i using netbeans 6.7 visual jsf
so i think user is same

[Tolls]

I have no idea how that is run.
Could it have restrictions like an applet for example?
You'll need to hunt down documentation for it all, but it's privileges that are your problem.