How can I determine if a file is a PDF file?

Question

I am using PdfBox in Java to extract text from PDF files. Some of the input files provided are not valid and PDFTextStripper halts on these files. Is there a clean way to ch

Answer 1

Since you use PDFBox you can simply do:

PDDocument.load(file);

It'll fail with an Exception if the PDF is corrupted etc.

If it succeeds you can also check if the PDF is encrypted using .isEncrypted()