Write an InputStream to an HttpServletResponse

Question

I have an InputStream that I want written to a HttpServletResponse. There\'s this approach, which takes too long due to the use of byte[]

InputStream is = ge         


        

Answer 1

I think that is very close to the best way, but I would suggest the following change. Use a fixed size buffer(Say 20K) and then do the read/write in a loop.

For the loop do something like

byte[] buffer=new byte[20*1024];
outputStream=response.getOutputStream();
while(true) {
  int readSize=is.read(buffer);
  if(readSize==-1)
    break;
  outputStream.write(buffer,0,readSize);
}

ps: Your program will not always work as is, because read don't always fill up the entire array you give it.