How can i show pdf in my web application?

Question

if the pdf (or else) file is under web content folder is simple, i can make a link to the resource, but if is it out of the .war file i deployed??
I know I set a outside folder in web server classpath, so i can get URL and then the InputStream from the pdf file, like this:
URL url = null;
    url =request.getClass().getClassLoader().getResource("file.pdf");
    InputStream is = url.openStream();
    response.setContentType(".......");  // how i must set???
    OutputStream os = response.getOutputStream();
    byte[] bytearray = new byte[1024];
    int bytesread = 0;
    while( (bytesread = is.read(bytearray) ) != -1 )
    os.write(bytearray, 0, bytesread);
    os.flush();
    is.close();The question now is: how can my browser understand opening the response by the pdf reader?

Answer 1

Set the response headers. Especially the content type, content disposition and content length. You may find this example useful: [http://balusc.blogspot.com/2007/07/fileservlet.html]. All content types (mime types) can be found here: [http://www.w3schools.com/media/media_mimeref.asp].