How to extract parameter from pdf file using java code & pdfbox

I am doing a java program which is to extract parameter from pdf files. I would like to extract the pdf to get the parameter like

parameter:

so I wish to get the output shown in the picture below:

obj

endobj

1 Answer
1

Going by comment above So you want to extract the text from the PDF, and then count the occurences?, you can do as follows:

Read the PDF file in:

String words = null;
try (PDDocument document = PDDocument.load(new File("C:pathtofile.pdf"))) {
document.getClass();
if (!document.isEncrypted()) {
PDFTextStripperByArea stripper = new PDFTextStripperByArea();
stripper.setSortByPosition(true);
PDFTextStripper tStripper = new PDFTextStripper();
String pdfFileInText = tStripper.getText(document);
words = pdfFileInText.split("s+");
}
}


And then print the occurrences of words:

Arrays.stream(words)
.collect(Collectors.groupingBy(s -> s))
.forEach((k, v) -> System.out.println(k + " " + v.size()));


You may need to tweak this slightly to your own needs.

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