Question

How to change this code to force overwrite existing previously opened file saved on drive? It’s part of servlet for opening pdf files on client side.

response.reset();
response.setContentType("application/pdf");
response.setContentLength(file.length());
response.setHeader("Content-disposition", "inline; filename=\"" + file.getName() + "\"");
BufferedInputStream input = null;
BufferedOutputStream output = null;

try 
{
  input = new BufferedInputStream(new FileInputStream(file), DEFAULT_BUFFER_SIZE);
  output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);

  byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
  int length;
  while ((length = input.read(buffer)) > 0) 
  {
    output.write(buffer, 0, length);
  }
} 
finally 
{
  close(output);
  close(input);
}

Each next copy of opened file has a new index, e.g. test.pdf, test(1).pdf and so on

Answer 1

You can’t control that.

That is dependent on client’s OS file system implementation