java - open pdf file in new window using servlet

Question

I am generating a pdf file for gate pass from my web application through servlet. I want to open this newly generated pdf in new window/tab and user should come back to the application from servlet. How can i open pdf in new window/tab? I am generating pdf from itext api. My servlet code snippet is:

        response.setHeader("Expires", "0");
        response.setHeader("Cache-Control","must-revalidate, post-check=0,precheck=0");
        response.setHeader("Pragma", "public");
        response.setContentType("application/pdf");
        response.setContentLength(baos.size());
        OutputStream os = response.getOutputStream();
        baos.writeTo(os);
        os.flush();
        os.close(); 

Answer 1

In case if you are using GET request to make a servlet call

GET set the target of link to target="_blank"

<a href="/url/to/servlet" target="_blank"/>

POST

<form method="post" action="url/to/servlet"
  target="_blank">

so browser will make a new GET/POST request in new window/tab and then set the header Content-disposition to inline to render pdf inline instead of prompting a download window