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Sample Java code for using PDFTron SDK to traverse the page display list using ElementReader. Learn more about our Java PDF Library and PDF Parsing & Content Extraction Library.
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//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------
import com.pdftron.common.PDFNetException;
import com.pdftron.pdf.*;
public class ElementReaderTest {
static void ProcessElements(ElementReader reader) throws PDFNetException {
for (Element element = reader.next(); element != null; element = reader.next()) // Read page contents
{
switch (element.getType())
{
case Element.e_path: // Process path data...
{
PathData data = element.getPathData();
byte[] operators = data.getOperators();
double[] points = data.getPoints();
}
break;
case Element.e_text: // Process text strings...
{
String data = element.getTextString();
System.out.println(data);
}
break;
case Element.e_form: // Process form XObjects
{
reader.formBegin();
ProcessElements(reader);
reader.end();
}
break;
}
}
}
public static void main(String[] args) {
PDFNet.initialize(PDFTronLicense.Key());
// Relative path to the folder containing test files.
String input_path = "../../TestFiles/";
String output_path = "../../TestFiles/Output/";
try // Extract text data from all pages in the document
{
System.out.println("-------------------------------------------------");
System.out.println("Sample 1 - Extract text data from all pages in the document.");
System.out.println("Opening the input pdf...");
PDFDoc doc = new PDFDoc(input_path + "newsletter.pdf");
doc.initSecurityHandler();
int pgnum = doc.getPageCount();
PageIterator itr;
ElementReader page_reader = new ElementReader();
for (itr = doc.getPageIterator(); itr.hasNext(); ) // Read every page
{
page_reader.begin(itr.next());
ProcessElements(page_reader);
page_reader.end();
}
//Close the open document to free up document memory sooner.
doc.close();
System.out.println("Done.");
} catch (Exception e) {
System.out.println(e);
}
PDFNet.terminate();
}
}