Help for javac task in ant? (urgent!!!!)

Question

Here I have 5+ folders, ervery has many java source files. And all the java source files in these folders is the same package name, also there may have same file name in different folder. And now I want the javac to compile these files and save the classes file to each own folder.
folder--fd1
| |--a1.java (package org.apache.jsp)
| |--b1.java (package org.apache.jsp)
| |--c1.java (package org.apache.jsp)
|---fd2
| |--a1.java (same file name as in fd1) (package org.apache.jsp)
| |--b2.java (package org.apache.jsp)
| |--c2.java (package org.apache.jsp)
|--
foler--fd1
| |--a1.java
| |--a1.class (also the package is org.apache.jsp, but it store in here.)
| |--b1.java
| |--b1.class
| |--c1.java
| |--c1.class
|---fd2
| |--a1.java (same file name as in fd1)
| |--a1.class
| |--b2.java
| |--b2.class
| |--c2.java
| |--c2.class
|--
And now I can complete the compile work through 2 steps in up condition, first to compile fd1 folder, and then to compile fd2 folder. For if I just compile with folder(root folder), it will return duplicate class error. How could I do with this?
below is my javac config in build.xml:
<target name="compile" >
<path id="javac.classpath">
<fileset dir="${tomcat.home}\common\lib">
<include name="*.jar"/>
</fileset>
<fileset dir="${tomcat.home}\server\lib">
<include name="*.jar"/>
</fileset>
<pathelement location="${basedir}\classes" />
<fileset dir="${basedir}\web\WEB-INF\lib">
<include name="*.jar"/>
</fileset>
</path>
<javac failonerror="true" debug="off" verbose="2" deprecation="off" classpathref="javac.classpath">
<src path="${basedir}/folder/fd1"/>
</javac>
<javac failonerror="false" debug="off" verbose="2" deprecation="off" classpathref="javac.classpath">
<src path="${basedir}/folder/fd1"/>
</javac>
</target>

Answer 1

To compile recursively you'll need of these for each directory:
<target name="compilef1" depends="init">
<javac srcdir="f1/" destdir="f1/" debug="true" deprecation="true"/>
</target>
But, you'll need to set up the build tree correctly before it'll work:
f1/org/apache/jsp defines the org.apache.jsp package in directory f1, so compiling in f1/ will correctly find other related files.
Regards,
Bhaveet