Ant实现run-on-hadoop的功能。先打包jar，然后把jar路径赋值给mapred.jar。

run-on-hadoop

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<project basedir="." default="run" name="run-on-hadoop">

	<property environment="env"/>
	
	<property name="fs.default.name" value="hdfs://192.168.0.205:9000" />
	<property name="mapred.job.tracker" value="h205:9001" />
	
	<property name="HADOOP_HOME" value="C:/cygwin/home/Winseliu/hadoop-1.0.0" />
	<property name="build.dir" value="build" />
	<property name="build.classes" value="bin"/>
	
	<!-- DSTAMP TSTAMP TODAY -->
	<tstamp>
		<format property="now" pattern="yyyyMMddHHmmss"/>
	</tstamp>

	<property name="debuglevel" value="source,lines,vars"/>

	<property name="target" value="1.6"/>
	<property name="source" value="1.6"/>

	<path id="hadoop.userclasspath">
		<pathelement location="${HADOOP_HOME}/hadoop-core-1.0.0.jar"/>

		<fileset dir="${HADOOP_HOME}">
			<include name="lib/*.jar"/>
		</fileset>
	</path>

	<path id="runon.classpath">
		<pathelement location="bin"/>
		<path refid="hadoop.userclasspath"/>
	</path>

	<target name="init">
		<echo message="fs.default.name" />
		<mkdir dir="${build.dir}" />
		<mkdir dir="${build.classes}"/>
		
		<copy includeemptydirs="false" todir="bin">
			<fileset dir="src">
				<exclude name="**/*.java"/>
			</fileset>
		</copy>
	</target>

	<target name="clean">
		<delete dir="${build.classes}"/>
		<delete dir="${build.dir}"/>
	</target>

	<target depends="clean" name="cleanall"/>

	<target depends="build-project" name="build"/>

	<target depends="init" name="build-project">
		<echo message="${ant.project.name}: ${ant.file}"/>
		<echo message="...暂时只考虑需要测试的examples目录..." />
		
		<javac debug="true" debuglevel="${debuglevel}" srcdir="src" destdir="${build.classes}" source="${source}" target="${target}">
			<include name="**/examples/*" />
			<classpath refid="runon.classpath"/>
		</javac>
	</target>
	
	<property name="exported.jar" value="${build.dir}/tmp-runonhadoop-${now}.jar"></property>

	<target name="jar" depends="build" description="Make tmp-run.jar">
		<jar jarfile="${exported.jar}" basedir="${build.classes}">
			<fileset dir="${build.classes}" includes="**/example/*" />
			<exclude name="**/core-site.xml"/>
		</jar>
	</target>

	<target name="FileSystemTest" depends="build">
		<java classname="com.winse.hadoop.examples.FileSystemTest" failonerror="true" fork="yes">
			<classpath refid="runon.classpath"/>
		</java>
	</target>
	<target name="WordCount" depends="build, jar" >
		<echo message="...这里就是最重要的点咯！..." />
		<java classname="com.winse.hadoop.examples.WordCount" failonerror="true" fork="yes">
			<arg line="-fs=${fs.default.name} -jt=${mapred.job.tracker} -Dmapred.jar=${exported.jar} /test/input /test/output"/>
			
			<classpath refid="runon.classpath"/>
		</java>
	</target>
	
	<target name="run" depends="clean, WordCount" />
	
</project>