Using Ben Gill : https://appfuse.dev.java.net/files/documents/1397/7833/rename-packages-0.9.zip Used The method is as follows: 1. Backup Your file 2. CD Rename-packages-0.9 # The first parameter is the new Package name The second parameter is the name of your source folder 3. Ant -dnew.pkg.name = COM. Mycompany -dsrc.base.dir = .. / YourappFuseProject4. Sit Back and Watch The Magic Happen. Note: Place the Rename Kit and your source folder in the same class directory, as shown below D: /Rename-packages-0.9D :/yourapp otherwise the third step cannot be executed correctly. In addition: I found that only "com.xxx" has successfully generated, but org.xxx can't, I don't know why I can discuss users@Appfuse.dev.java.net if you have any questions that can be discussed with the mail list.