Library/Tool to extract word coordinates from a pdf

I am looking for a (preferably Java-) library or a command line tool to extract word coordinates from pdfs. The input-pdfs contain either text or images with ocr-text in behind.

My Use Case:

In a Java web-application I would like to use this to do hit highlighting and present this without additional software (e.g. Adobe Reader etc.). Instead I want to convert the the matching pages into i开发者_如何转开发mages and present them within a web page.

You should be able to use http://pdfbox.apache.org/ to do the highlighting and present them as pdf itself. Also look at http://itextpdf.com/.

You can use JPedal to generate the thumbnails (http://www.jpedal.org/pdf_thumbnail_tutorials.php) and extract the text (http://www.jpedal.org/support_egETAW.php)