1.环境变量设置
首先，确定自己的/etc/profile或者/${HOME}/.bashrc下有如下的环境设置：
------
#set java env
export JAVA_HOME=xxx
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$CLASSPATH

#set tomcat env
export TOMCAT_HOME=xxx

#set ant env
export ANT_HOME=xxx
export PATH=$PATH:$ANT_HOME/bin
------

有了以上的设置，就可以使用<property environment="env"/>来找到相关的环境变量。

在shell下可以
[root@localhost ~]# env
查看环境变量。

2.ant脚本位置
根据MyEclipse下Web工程的文件位置放置build.xml(与WebRoot同层)：
－－－－－－
|－src
|－WebRoot
 ｜－WEB-INF
 ｜－META-INF
|－build.xml
－－－－－－

3.build.xml
该脚本可以将当前的Web工程编译并部署到你的Tomcat的webapps目录下，为避免在webapps下出现工程名相同而覆盖的情况，将使用当前部署时间作为工程名。注意，这里假定使用Tomcat6，它的/lib目录有别于Tomcat5。
<? xml   version ="1.0"   encoding ="utf-8" ?>
    
 < project   name ="myDeploy"   default ="all"   basedir ="." >

      < property   name ="build.dir"   value ="${basedir}/build" />
     < property   name ="src"   value ="${basedir}/src" />
     < property   name ="build.webinf"   value ="${basedir}/build/WEB-INF" />
     < property   name ="build.weblib"   value ="${basedir}/build/WEB-INF/lib" />
     < property   name ="build.metainf"   value ="${basedir}/build/META-INF" />
     < property   name ="build.dest"   value ="${basedir}/build/WEB-INF/classes" /> 
     < property   environment ="env" />   
    
     < target   name ="init" >
         < tstamp />
         < mkdir   dir ="${build.dir}" />
         < mkdir   dir ="${build.webinf}" />
         < mkdir   dir ="${build.weblib}" />
         < mkdir   dir ="${build.metainf}" />
         < mkdir   dir ="${build.dest}" />
        
         < copy   todir ="${build.dir}" >
             < fileset   dir ="${basedir}/WebRoot" >
                 < include   name ="**" />
             </ fileset >
         </ copy >
     </ target >
    
     < target   name ="compile"   depends ="init" >
         < property   name ="servletapi" 
                 value ="${env.TOMCAT_HOME}/lib/ * .jar" />
         < property   name ="locallib" 
                 value ="${build.weblib}/*.jar" />
         < javac   srcdir ="${src}"   destdir ="${build.dest}"  classpath ="${servletapi};${locallib}" />
     </ target >
    
     < target   name ="deploy"   depends ="compile" >
       < property   name ="deploy.dir"  value ="${env.TOMCAT_HOME}/webapps/${DSTAMP}${TSTAMP}" />
       < mkdir   dir ="${deploy.dir}" />
       < copy   todir ="${deploy.dir}" >
             < fileset   dir ="${build.dir}" >
                 < include   name ="**" />
             </ fileset >
         </ copy >
     </ target >
    
     < target   name ="clean"   depends ="init" >
         < delete   dir ="${build.dir}" />   
     </ target >

     < target   name ="all"   depends ="deploy,clean"
            description ="deploys the project to tomcat and cleans the build files." />
        
 </ project >