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Natural Language Processing with Java

You're reading from   Natural Language Processing with Java Techniques for building machine learning and neural network models for NLP

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Product type Paperback
Published in Jul 2018
Publisher
ISBN-13 9781788993494
Length 318 pages
Edition 2nd Edition
Languages
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Authors (2):
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Ashish Bhatia Ashish Bhatia
Author Profile Icon Ashish Bhatia
Ashish Bhatia
Richard M. Reese Richard M. Reese
Author Profile Icon Richard M. Reese
Richard M. Reese
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Toc

Table of Contents (14) Chapters Close

Preface 1. Introduction to NLP FREE CHAPTER 2. Finding Parts of Text 3. Finding Sentences 4. Finding People and Things 5. Detecting Part of Speech 6. Representing Text with Features 7. Information Retrieval 8. Classifying Texts and Documents 9. Topic Modeling 10. Using Parsers to Extract Relationships 11. Combined Pipeline 12. Creating a Chatbot 13. Other Books You May Enjoy

Using PDFBox to extract text from PDF documents


The Apache PDFBox (http://pdfbox.apache.org/) project is an API for processing PDF documents. It supports the extraction of text and other tasks, such as document merging, form filling, and PDF creation. We will only illustrate the text extraction process. To demonstrate the use of POI, we will use a file called TestDocument.pdf. This file was saved as a PDF document using the TestDocument.docx file, as shown in the Using POI to extract text from Word documents section. The process is straightforward. A File object is created for the PDF document. The PDDocument class represents the document and the PDFTextStripper class performs the actual text extraction using the getText method, as shown here:

File file = new File(getResourcePath());
PDDocument pd = PDDocument.load(file);
PDFTextStripper stripper = new PDFTextStripper();
String text= stripper.getText(pd);
System.out.println(text);

The output is as follows:

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