Extract text from PDF: PDFLib vs PDF extract vs pdf2xml

Question

I am looking for a library (if possible, in Java or PHP) to extract text from a PDF. There are many programs available, including:

• 3-Heights ™ PDF Extract http://www.pdf-tools.com/pdf/pdf-extract-content-metadata-text.aspx

• PDFlib TET - Text Extraction Tool http://www.pdflib.com/products/tet/

• PDF2XML http://sourceforge.net/projects/pdf2xml/

What tools would you choose? What do you think of them?

Thanks so much for your kind help!

Answer 1

iText (java), PDF , PDF , .

Answer 2

itext irs i1040.pdf :

< 1 > article.gmane.org/gmane.comp.java.lib.itext.general/65680

, , . : < 2 > www.verypdf.com/wordpress/201109/pdf-to-text-converter-cant-extract-text-which-render-by-embedded-fonts-2452.html < 3 > 9.10.1:     www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf

< 3 > :

... Unicode .

, " Unicode" .