Ant

Create an Ant script to concat multiple text files:

<?xml version="1.0"?>

<project name="concat files" default="build">
    <target name="build">
        <concat destfile="concatenated.txt" fixlastline="yes">
            <path>
  <pathelement path="<file_path>\text1.txt" />
  <pathelement path="<file_path>\text2.txt" />
        </concat>
    </target>
</project>

Commands:

ant -buildfile build-file.xml build-target