build.xml

<?xml version="1.0"?>
<!--是吗
<project name="helloWorld" basedir="E:\GAME">
       <target name="sayHelloWorld">
              <echo message="The base dir is: ${basedir}"/>
       </target>
</project>
是吗 

<project name="javaTest" default ="print" basedir="." >
    <target name="clean">
       <delete dir="build"/>
    </target>
	
    <target name="copy" >
    	<copy file="file2.txt" tofile="copy222.txt"/>
    </target>
	
    <target name="print" >
    	<echo message="Hello,Amigo"/>
    </target>

    <target name="compile" depends="clean">
       <mkdir dir="build/classes"/>
      <javac srcdir="src" destdir="build/classes"/>
    </target>

    <target name="run" depends="compile">
       <java classname="HelloWorld">
           <classpath>
              <pathelement path="build/classes"/>
           </classpath>
       </java>
    </target>
	
	<target name="jar" depends="run">
	<jar destfile="helloworld.jar" basedir="build/classes">
	           <manifest>
	              <attribute name="Main-class" value="HelloWorld"/>
	           </manifest>
	       </jar>
	</target>
</project>
-->

<!--生成jar包-->

<project name="helloWorld" default="makejar" basedir="D:\java_test">
	<target name="makejar" depends = "targetA">
		<description>
					a depend and a jar example!
		</description>
		<!--destfile 生成文件，basedir 需要生成的class-->
		<jar destfile="java_test.jar" basedir="bin">
			<manifest>
				<attribute name="Main-class" value="LambdaLearn.lambdaTest" />
			</manifest>

		</jar>
		
	</target>
	<!--生成目录-->
	<target name="makedir">
		<mkdir dir="build/classes"/>
	</target>
	
	<target name="targetA" if="ant.java.version">
	              <echo message="Java Version: ${ant.java.version}"/>
	</target>

</project>