Ant: How can I perform tasks on multiple projects

I am currently working on a project 开发者_开发知识库that involves many subprojects that all have the same directory structure. I would like to setup a system where I can run ant build and ant will go through each folder and run it's target on each of the folders.

There are multiple tasks like this besides compiling that I need to execute on each of the subprojects.

Does there already exist a method to handle this? Do I need to resort to scripting solutions?

Thanks.

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look here good tutorial http://www.javaranch.com/journal/200603/AntPart1.html But in summary the subAnt task should work