how to import ant java project into eclipse build.xml

To import java project into eclipse

On your eclipse go to this path

1.  Go to File -> New  ->  Project
2.  Select "Java Project from Existing Ant Bundle"

Click on Project

Select "Java Project from Existing Ant Bundle" after that click on next

Click on Browse button and select path of your project folder where you have placed

Now select build.xml file... this file is enough.. no need to select all folder...

whenever you click on open... automatically all folders will import into your eclipse.

You can get more details from here
http://jonnyman9.blogspot.co.uk/2012/06/how-i-imported-ant-project-into-eclipse.html