jenkins , ant ctomcat+shell报ant: command not foun.

#!/bin/sh

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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
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# http://www.apache.org/licenses/LICENSE-2.0 #
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JAVA_HOME=/usr/local/java/jdk1.7.0_51

export JENKINS_HOME="home/jenkins-home"

在catalina.sh中加入以上代码，否则ant编译出错！提示命令找不到