Before writing any PDF data, you must prepare the browser for the incoming stream:
Instead of passing a FileOutputStream to the iText PdfWriter , pass the response.getOutputStream() . download pdf directly to browser when generated with itext
To download a PDF directly to a browser using iText, you must stream the document's bytes directly to the and set the appropriate HTTP headers . Before writing any PDF data, you must prepare
The critical header is Content-Disposition . By setting its value to attachment , you force the browser to trigger a "Save As" dialogue instead of displaying the file in its internal viewer. Step-by-Step implementation Before writing any PDF data
This method avoids saving a temporary file on the server's disk, which is more secure and efficient for high-traffic applications. 1. Configure the Response Headers