Under every API above sits a parser library, usually C or C++, reached through a binding. Install the ones Ubuntu 225 packages, and VTD-XML 7,086 's jar from Maven 129 Central:
sudo apt-get update -qq
sudo apt-get install -y -qq libxml2-dev libexpat1-dev libxerces-c-dev libxerces-c-samples
mkdir -p ~/xml-tools/vtd && cd ~/xml-tools/vtd && [ -f vtd-xml-2.13.4.jar ] || curl -fsSLO \
https://repo1.maven.org/maven2/com/ximpleware/vtd-xml/2.13.4/vtd-xml-2.13.4.jar