* Ant中可以自定义属性，例如 <property name="var1" value="value1"/>；
* 也可以使用Java的系统属性，例如：
java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
sun.boot.library.path = C:/j2sdk1.4.2_09/jre/bin
java.vm.version = 1.4.2_09-b05
java.vm.vendor = Sun Microsystems Inc.
java.vendor.url = http://java.sun.com/ path.separator = ;
java.vm.name = Java HotSpot(TM) Client VM
file.encoding.pkg = sun.io
user.country = CN
sun.os.patch.level = Service Pack 2
java.vm.specification.name = Java Virtual Machine Specification
user.dir = E:/eclipse/testDemo
java.runtime.version = 1.4.2_09-b05
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs = C:/j2sdk1.4.2_09/jre/lib/endorsed
os.arch = x86
java.io.tmpdir = C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/
line.separator =
java.vm.specification.vendor = Sun Microsystems Inc.
user.variant =
os.name = Windows XP
sun.java2d.fontpath =
java.library.path = C:/j2sdk1.4.2_09/bin;.;C:/WINDOWS/system32;C:/WINDOWS;C:/j2sdk1.4.2_09/bin;d:/oracle/ora92/bin;C:/Program Files/Oracle/jre/1.1.8/bin;C:/WINDOWS/system32;C:/WINDOWS;C:/WINDOWS/System32/Wbem;D:/MySQL/MySQL Server 4.1/bin;d:/Program Files/IDM Computer Solutions/UltraEdit-32
java.specification.name = Java Platform API Specification
java.class.version = 48.0
java.util.prefs.PreferencesFactory = java.util.prefs.WindowsPreferencesFactory
os.version = 5.1
user.home = C:/Documents and Settings/Administrator
user.timezone =
java.awt.printerjob = sun.awt.windows.WPrinterJob
file.encoding = GBK
java.specification.version = 1.4
java.class.path = E:/eclipse/testDemo/bin;E:/eclipse/lucene-1.4.3/lucene-2.0.0/lucene- 2.0.0/lucene-core-2.0.0.jar;E:/Library/commons/commons-io-1.1.jar;E: /Library/commons/commons-net-1.1.0.jar;F:/everyday/6月/15/je-analysis- 1[1].2.2.jar;E:/Library/junit/junit.jar
user.name = Cral
java.vm.specification.version = 1.0
java.home = C:/j2sdk1.4.2_09/jre
sun.arch.data.model = 32
user.language = zh
java.specification.vendor = Sun Microsystems Inc.
awt.toolkit = sun.awt.windows.WToolkit
java.vm.info = mixed mode
java.version = 1.4.2_09
java.ext.dirs = C:/j2sdk1.4.2_09/jre/lib/ext
sun.boot.class.path = C:/j2sdk1.4.2_09/jre/lib/rt.jar;C:/j2sdk1.4.2_09/jre/lib/i18n.jar;C:/j2sdk1.4.2_09/jre/lib/sunrsasign.jar;C:/j2sdk1.4.2_09/jre/lib/jsse.jar;C:/j2sdk1.4.2_09/jre/lib/jce.jar;C:/j2sdk1.4.2_09/jre/lib/charsets.jar;C:/j2sdk1.4.2_09/jre/classes
java.vendor = Sun Microsystems Inc.
file.separator = /
java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
sun.io.unicode.encoding = UnicodeLittle
sun.cpu.endian = little
sun.cpu.isalist = pentium i486 i386
* 还可以使用Ant内置的属性，例如：
basedir project基目录的绝对路径 (与<project>的basedir属性一样)。
ant.file buildfile的绝对路径。
ant.version Ant的版本。
ant.project.name 当前执行的project的名字；由<project>的name属性设定.
ant.java.version Ant检测到的JVM的版本；目前的值有"1.1", "1.2", "1.3" and "1.4".
；
1 使用-Dvar=value来在运行时指定或修改property的值
<?xml version="1.0" encoding="UTF-8"?>
<project basedir="." default="test" name="testproject">
<property name="var1" value="value1"/>
<property name="var2" value="value2"/>
<target name="test" description="test property overwrite">
<echo message="var1=${var1}"/>
<echo message="var2=${var2}"/>
</target>
</project>
运行ant为：
test:
[echo] var1=value1
[echo] var2=value2
运行ant -Dvar1=value1new为：
test:
[echo] var1=value1new
[echo] var2=value2
2Ant中使用系统的环境变量
<target name="printinfo">
<property environment="env" />
<echo message="${env.BUILD_TAG}"/>
</target>
3
完！
作者：iTech
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