Problem in Downloading Word Document of very huge size

Question

Hi Folks,
I upload a word document of 5 MB size to the server. I do hexencoding before
I upload. The problem is when i try to download the file from the server it
goes on parsing the document and it does'nt stop. It is getting stuck in
the while loop. I am using BufferedInputStream for reading the data and
storing it in a String. Even the CPU utilization stays at 100% in Task Manager.
Can any of you Suggest a solutation? Should I replace BufferedInputStream with
some other class.
Thanks in advance.
-deena

Answer 1

No wonder it takes long or even seems that it hangs... Your going to use incredible amount of memory within that loop. First of all you recreate your buffer every time, but then you create new string of it, and then concat it to other, which will again create new string. Stringbuffer will probably help, but it's still a waste.
try this:
byte inbuffer[]=new buffer[BUFSIZE];
byte outbuffer[]=new buffer[BUFSIZE/2];
int readed;
while ( (readed=in.read(buffer))!=0)
   hexEncode(outbuffer, inbuffer, readed); // or whatever way you do it
   out.write(outbuffer, 0, readed); // or whereever you want to put the data
}Anyway the idea is to use common input and output buffer so memory isn't wasted. This is based on a fact that InputStreams read suplied only with byte[] argument read's as much as possible from stream and return the amount of bytes read.