項目結構:
test1
   src
      test1
   WEB-INF
      classes
   build.xml
1.build.xml
<?xml version="1.0"?>
<project name="project" default="run" basedir=".">
<target name="compile">
 <javac destdir="WEB-INF/classes" srcdir="src"></javac>
</target>
<target name="run" depends="compile">
 <java classname="test1.Hello" classpath="WEB-INF/classes"></java>
</target>
</project>
      
2.Hello.java 
package test1;
public class Hello{
 public static void main(String[] arg){
  System.out.println("hello world!!!!!!");
 }
}
命令行中輸入ant運行