ant 使用命名空间自定义task

一：

首先，写三个ant 任务 （每个任务都必须继承org.apache.tools.ant.Task）



1：

package cn.cloud.ant;  
  
import org.apache.tools.ant.BuildException;  
import org.apache.tools.ant.Task;  
public class DetailTask extends Task  
{  
    public void execute() throws BuildException  
    {  
        System.out.println("detail can be execute");  
    }  
}

2：

package cn.cloud.ant;  
  
import org.apache.tools.ant.BuildException;  
import org.apache.tools.ant.Task;  
public class ListTask extends Task   
{  
    public void execute() throws BuildException  
    {  
        System.out.println("this is list task");  
    }  
}

3：

package cn.cloud.ant;  
  
import org.apache.tools.ant.BuildException;  
import org.apache.tools.ant.Task;  
public class ShowTask extends Task  
{  
    public void execute() throws BuildException  
    {  
        System.out.println("show task");  
    }  
}

三：编写antlib.xml文件（该文件需要放在src跟目录下）

<?xml version="1.0"?>



<antlib>

<taskdef name="mylist" classname="cn.cloud.ant.ListTask"/>

<taskdef name="myshow" classname="cn.cloud.ant.ShowTask"/>

<taskdef name="mydetail" classname="cn.cloud.ant.DetailTask"/>

</antlib>

四：编写ant脚本build.xnl

<?xml version="1.0" encoding="UTF-8"?>



<project name="ext_task" basedir="." xmlns:my="xxx" default="message-echo">



<property name="base.dir" location="target"></property>

<property name="src.dir" location="src"></property>

<property name="class.dir" location="${base.dir}/classes"></property>



<target name="Introduction">

<echo>this is my first ant task</echo>

<echo>${basedir}</echo>

<echo>this is my first ant task</echo>

</target>



<target name="clean" depends="Introduction">

<delete dir="${base.dir}"></delete>

</target>



<target name="init" depends="clean">

<mkdir dir="${base.dir}"></mkdir>

<mkdir dir="${class.dir}"></mkdir>

</target>



<target name="compile" depends="init">

<javac includeantruntime="true" destdir="${class.dir}" srcdir="${src.dir}" target="1.7"></javac>

<copy todir="${class.dir}">

<fileset dir="${src.dir}">

<exclude name="**/*.java"/>

</fileset>

</copy>

</target>



<target name="init-task-def" depends="compile">

<echo>define .................</echo>

<taskdef resource="antlib.xml" uri="xxx">

<classpath path="${class.dir}"></classpath>

</taskdef>

</target>



<target name="message-echo" depends="init-task-def">

<my:mylist />

<my:myshow />

<my:mydetail />

</target>



</project>