taskdef class org.apache.catalina.ant.InstallTask cannot be found

在做spring教學練習時，遇到build.xml:85: taskdef class org.apache.catalina.ant.InstallTask cannot be found

教學網址：
http://static.springsource.org/docs/Spring-MVC-step-by-step/part1.html

找了許多資料，終於解決：

將build.xml 第85行替換紅色字即可

<taskdef name="install" classname="org.apache.catalina.ant.InstallTask"> 
<taskdef name="install" classname="org.apache.catalina.ant.DeployTask">