Ant build with lib

Cấu trúc folder :

file Java :

 package oata;  
 import org.apache.log4j.Logger;  
 import org.apache.log4j.BasicConfigurator;  
 public class HelloWorld {  
   static Logger logger = Logger.getLogger(HelloWorld.class);  
   public static void main(String[] args) {  
     BasicConfigurator.configure();  
     logger.info("Hello World");     // the old SysO-statement  
   }  
 }  

File log4j.properties :

 log4j.rootLogger=DEBUG, stdout  
 log4j.appender.stdout=org.apache.log4j.ConsoleAppender  
 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout  
 log4j.appender.stdout.layout.ConversionPattern=%m%n  

File build :

 <project name="HelloWorld" basedir="." default="main">  
      <property name="src.dir" value="src" />  
      <property name="build.dir" value="build" />  
      <property name="classes.dir" value="${build.dir}/classes" />  
      <property name="jar.dir" value="${build.dir}/classes" />  
      <property name="main-class" value="oata.HelloWorld" />  
      <property name="lib.dir" value="lib"/>  
   <path id="classpath">  
     <fileset dir="${lib.dir}" includes="**/*.jar"/>  
   </path>  
      <target name="clean">  
           <delete dir="${build.dir}" />  
      </target>  
      <target name="compile">  
           <mkdir dir="${classes.dir}" />  
           <javac srcdir="${src.dir}" destdir="${classes.dir}" classpathref="classpath"/>  
           <copy todir="${classes.dir}">  
       <fileset dir="${src.dir}" excludes="**/*.java"/>  
     </copy>  
      </target>  
      <target name="jar" depends="compile">  
           <mkdir dir="${jar.dir}" />  
           <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}" >  
                <manifest>  
                     <attribute name="Main-Class" value="${main-class}" />  
                </manifest>  
           </jar>  
      </target>  
      <target name="run" depends="jar">  
           <java fork="true" classname="${main-class}" >  
                <classpath>  
                     <path refid="classpath" />  
                     <path id="application" location="${jar.dir}/${ant.project.name}.jar" />  
                </classpath>  
           </java>  
      </target>  
      <target name="clean-build" depends="clean,jar" />  
      <target name="main" depends="clean,run" />  
 </project>