ant 学习（4）--常用task

 ant核心task

ant

Invoke the default target on util_buildfile.xml in the current directory:
<ant antfile="util_buildfile.xml"/>
Invoke the clean target on build.xml in the gui directory:
<ant dir="gui" target="clean"/>
Invoke  another buildfile, passing a new value for the builddir property. The  value is explicitly set to utiloutput even if the property was defined  elsewhere in the calling buildfile:
<ant antfile="util_buildfile.xml">
<property name="builddir" value="utiloutput"/>
</ant>

Copy

This example copies all Java source files to a new directory, replacing all occurrences of@VERSION@ with the value of app.version.
<copy todir="${builddir}/srccopy">
<fileset dir="${srcdir}">
<include name="**/*.java"/>
</fileset>
<filterset>
<filter token="VERSION" value="${app.version}"/>
</filterset>
</copy>

delete

Here is a common target found in just about every Ant buildfile. It deletes the build directory and all of its contents:
<target name="clean" description="Remove all generated code">
<delete dir="${builddir}"/>
</target>

echo

The  first of the following examples specifies the text to write using the  message attribute. The second example specifies the text to write by  enclosing it within <echo>...</echo> tags.
<echo message="Building to ${builddir}"/>
<echo>You are using version ${java.version}
of Java! This message spans two lines.</echo>

javac

Compile all Java source files in the com.oreilly.antbook package and subpackages, placing results in ${builddir}:
<javac srcdir="${srcdir}"
destdir="${builddir}"
includes="com/oreilly/antbook/**"/>

mkdir

This  task is commonly used in a prepare target that other targets depend on.  This ensures that necessary destination directories are created before  other targets are executed.

<target name="prepare">
<mkdir dir="${builddir}"/>
<mkdir dir="${deploydir}/docs"/>
</target>
<target name="compile" depends="prepare">
...
</target>

sleep

<!-- start a web server, then wait a few seconds for it to initialize -->
<sleep seconds="10"/>
<!-- now start the client unit tests -->