ant脚本和java程序间的互相调用

1,ant脚本调用java程序
  a，建立一个java类，继承ant的Task类：
package org.example;   
  
import org.apache.tools.ant.BuildException;   
import org.apache.tools.ant.Task;   
    
public class ExampleTask extends Task {   
  private String msg;   
    
  // The method executing the task   
  public void execute() throws BuildException {   
   System.out.println(msg);   
  }   
  // The setter for the "message" attribute   
  public void setMessage(String msg) {   
   this.msg = msg;   
  }   
}   
b，ant脚本：
<?xml version="1.0"?>  
  
<project name="ExampleTask" default="main" basedir=".">  
<taskdef name="mytask" classname="org.example.ExampleTask">  
  <classpath>  
   <pathelement location="./classes" />  
  </classpath>  
</taskdef>  
<target name="main">  
  <mytask message="this is a example." />  
</target>  
</project> 

c,运行ant脚本。
 
2,java程序调用ant脚本
  1，建立一个java类，

package org.example;   
import java.io.File;   
import org.apache.tools.ant.BuildException;   
import org.apache.tools.ant.DefaultLogger;   
import org.apache.tools.ant.Project;   
import org.apache.tools.ant.ProjectHelper;   
  
public class AntExample {   
  
/**  
  * @param args  
  */  
public static void main(String[] args) {   
  File buildFile = new File("example.xml");   
  Project p = new Project();   
  try {   
   p.fireBuildStarted();   
   p.init();   
   ProjectHelper helper = ProjectHelper.getProjectHelper();   
   helper.parse(p, buildFile);   
   p.executeTarget(p.getDefaultTarget());   
   p.fireBuildFinished(null);   
  } catch (BuildException e) {   
   p.fireBuildFinished(e);   
  }   
}   
}   

b,ant脚本:

<?xml version="1.0"?>  
<project name="ant4J" default="main" basedir=".">  
<target name="main">  
<echo message="ant file for java " />  
</target>  
</project>