Hello Ant

Create project

mkdir hello
mkdir src
cd src
vim Hello.java

Say hello to ant.

Build.xml

1 2	cd .. vim Build.xml

Set up properties
the source file path/ class path/ jar path and so on.
the trigger target is rerun

<?xml version="1.0" encoding="UTF-8" ?>
<project name="hello" default="rerun" basedir=".">
    <property name="src" value="src"/>
    <property name="dest" value="classes"/>
    <property name="jar_path" value="hello.jar"/>

Define the init method
clean workspace first
print a log and make classes directory

<target name="init" depends="clean">
    <echo>+---------------------------------------------------+</echo>
    <echo>| |</echo>
    <echo>| B U I L D I N G ${dest} |</echo>
    <echo>| |</echo>
    <echo>+---------------------------------------------------+</echo>
    <mkdir dir="${dest}"/>
</target>

compile project use javac command

1
2
3

<target name="compile" depends="init">
    <javac srcdir="${src}" destdir="${dest}" includeAntRuntime="false"/>
</target>

package project target to a jar and execute

<target name="build" depends="compile">
    <jar jarfile="${jar_path}" basedir="${dest}"/>
</target>
<target name="run" depends="build">
    <java classname="Hello" classpath="${jar_path}"/>
</target>

delete build files

<target name="clean">
    <delete dir="${dest}" />
    <delete file="${jar_path}" />
    <echo>x</echo>
</target>

rerun the process

    <target name="rerun" depends="clean,run">
        <ant target="run" />
        <ant target="clean" />
        <echo>xx</echo>
    </target>
</project>

Procedure

clean
init
compile
build
run
1 -> 5
clean