ant学习－The Prefix Attribute

The Prefix Attribute
3Mh`mr:P0The Problem: I have to access some properties (from a file), which are already defined in my build file. To be able to access the properties I can use the prefix attribute of the property task.

.I}3M/ba3]s gC0framework.properties ：51Testing软件测试网.p/Y/J+s}S |C

\9{
m3l$I*oDg]k0#Release information about the framework
-Zx6Xi/Is/n0#Thu Oct 14 16:25:12 CEST 2004
3jb Y4Yc0build.number=11551Testing软件测试网 t@3~ja/_
release.version=0.4
R8\{ b0G7u2yzS0release.name=framework51Testing软件测试网/A{/Yz9s&o:e$?

51Testing软件测试网FDS@6GEk
Ant Example Target ：51Testing软件测试网,FcunY$C@ iF

<target name="read.properties">   
Z-b([.Ab6P0  <!-- Read the properties from the release of the framework -->51Testing软件测试网G#}9DI_"I
  <property file="framework.properties" prefix="framework"/>
'b&[!eX/u2X8Za0  <echo message="${framework.build.number}"/>
niN.c0N/KuU1o VP1^0  <echo message="${framework.release.version}"/>
7x GjWu
mrI0  <echo message="${framework.release.name}"/>   
)` j9QW Y0</target>   51Testing软件测试网k"]Z^aK0c7c

2we?'Xn'j3@y0Output：

(c}ESf[9t-D0Buildfile: C:\build.xml51Testing软件测试网^3HT]E4@!c*`
read.properties:51Testing软件测试网'^p5Z(g,\U&s
  [echo] 11551Testing软件测试网ik
q-Caz%Y,mgX
  [echo] 0.4
)KI)SF3Q0  [echo] framework
.K`-Yt*d,u(R]N0BUILD SUCCESSFUL51Testing软件测试网Oi8[KmPB
Total time: 3 seconds
Y$\ K2F8TC0