Hi Evans,
I'm facing problem to upload huge file like (size is
7mb,10mb). In your last thread
you have specified it will work in only small datas or files. I want to know
any other method
to solve in struts2 framework.
Disclaimer: This approach is limited to small files (multiple megabytes
> rather than hundreds/gigs) because of the inefficient memory
> consumption. It's also quite slow as the commons fileuploader first
> receives all the data, then writes the entire temporary file, then it's
> read again entirely into memory, then written back to your
> database/filesystem. There's no other built-in approach in Struts2 but
> you'll find ajax fileuploaders on the web that handle massive files
> better than this.
Jeromy Evans - Blue Sky Minds wrote:
>
>
>
> Johnson nickel wrote:
>> Hi Jeromy Evans,
>>
>> Thanks for your reply. I would like to insert the images
>> into
>> my
>> Databases. For that, i'm using byte[] array.
>> In Struts 1.3,
>> I used FormFile class. From this class i got the method
>> getFileData();
>>
>> In my db, ps.setBytes(1,filedata); // to store the binary
>> datas in DB.
>>
>> /*FormFile mtfile = form.getTheFile();
>> byte[] filedata = mtfile.getFileData();*/
>>
>>
>>
> Ahh, ok.
>
> In Struts2, the file is a reference to a temporary file created on your
> server. If it's not HUGE, just read it into a byte array.
> The code follows. This code is a fairly standard approach to read an
> arbitrary length inputstream into a byte array one chunk at a time.
> If the file can be HUGE, see my comment at bottom.
>
> byte[] filedata = readInputStream(new FileInputStream(upload));
>
> /** Read an input stream in its entirety into a byte array */
> public static byte[] readInputStream(InputStream inputStream) throws
> IOException {
> int bufSize = 1024 * 1024;
> byte[] content;
>
> List<byte[]> parts = new LinkedList();
> InputStream in = new BufferedInputStream(inputStream);
>
> byte[] readBuffer = new byte[bufSize];
> byte[] part = null;
> int bytesRead = 0;
>
> // read everyting into a list of byte arrays
> while ((bytesRead = in.read(readBuffer, 0, bufSize)) != -1) {
> part = new byte[bytesRead];
> System.arraycopy(readBuffer, 0, part, 0, bytesRead);
> parts.add(part);
> }
>
> // calculate the total size
> int totalSize = 0;
> for (byte[] partBuffer : parts) {
> totalSize += partBuffer.length;
> }
>
> // allocate the array
> content = new byte[totalSize];
> int offset = 0;
> for (byte[] partBuffer : parts) {
> System.arraycopy(partBuffer, 0, content, offset,
> partBuffer.length);
> offset += partBuffer.length;
> }
>
> return content;
> }
>
> Disclaimer: This approach is limited to small files (multiple megabytes
> rather than hundreds/gigs) because of the inefficient memory
> consumption. It's also quite slow as the commons fileuploader first
> receives all the data, then writes the entire temporary file, then it's
> read again entirely into memory, then written back to your
> database/filesystem. There's no other built-in approach in Struts2 but
> you'll find ajax fileuploaders on the web that handle massive files
> better than this.
>
> regards,
> Jeromy Evans
>
>
>
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>
Quoted from:
http://www.nabble.com/Struts-2-File-upload-to-store-the-filedata-tp14168069p14169822.html
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