Getting NullPointerException while uploading a file

[venu babu Karri]

In my project,in the production some how we are getting NullPointerException while uploading a file. To upload a file we are using <html:file property=""> struts tag and we are using FormFile as the property of the form. We are trying to simulate this issue in the local by using Chrome,internet explorer,safari,Opera and mozila. we are unable to simulate, but in production we are getting NullPointerException while getting the form property like below

public class MyForm
{
private FormFile myFile;
setter & getter
}

In Action we are saying

myForm.getMyFile().getFileName();

Here we are getting NullPointerException.


if we don't upload any file, in action for the "myForm.getMyFile()" its giving empty. But some how in some cases we are getting for the same(myForm.getMyFile()) null. we are thinking that some browsers are not supporting file upload. Can you help me. Its urgent Please

[Campbell Ritchie]

Either myForm is null, or the getMyFile() method of myForm is returning null.

[Campbell Ritchie]

venu babu Karri wrote: . . . Its urgent Please

There's no such thing as urgent here.

[David Newton]

Moving to Struts.

[David Newton]

No browser doesn't support file upload. (Although you should be checking for null--what if they *meant* to not upload a file? I don't recall what Struts 1 does under that circumstance.)

You need to figure out what's different between the requests that succeed and those that fail.

[puneeth poduri]

hi venu babu Karri ,

if struts 2
do the following
in action tag in struts.xml make sure you do this

                        <interceptor-ref name="fileUpload">
			<param name="fileUpload.maximumSize">wat ever pleases</param>
			</interceptor-ref>
			<interceptor-ref name="defaultStack">
             

Then in your struts file tag please set the name attribute to myFile

In action class please do the following

             String myFileName;
             File myFile;
             ...
             getter and setter
             

this will help
Apache fileupload

[David Newton]

FormFile is a Strits 1 artifact.

[venu babu Karri]

Campbell Ritchie wrote:Either myForm is null, or the getMyFile() method of myForm is returning null.

getMyFile() is null. Then how it is becoming null.. I am unable to know. Generally while using <html:file> and FormFile to upload a file, If we dont upload a file getFormFile() gives empty string,If we upload some thing getFormFile() gives file name what we have uploaded. In some case getFormFile() is returning null.If you know.. Please let me know