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>