Adobe Acrobat Reader 无法打开 pdf 文件，因为它不是受支持的文件类型或文件已损坏

Question

I am using below code while merging single PDF file.

link: https://codesjava.com/itext-merge-pdf-files-in-java

Some times only, I am facing below issue, How can i resolve please help me, I should be use live. itextpdf.5.4.4 version

Adobe Acrobat Reader could not open pdf file because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded).

Answer 1

You are making the mistake of trying to merge PDF files using the PDFWriter class. It is bad code and should not be used according to the creator of the iText library.

See this post how to properly merge PDF files.

Merge pdf documents of different width using iText

You should be using the PDFCOPY class to merge files.

Also, you cannot merge a 'single' PDF file like your first sentence states. The idea of merging is to combine multiple pages or files.