Retrieve parameters from properties file

Question

I have several Jenkins parameterized jobs that uses the same parameters and parameters values. When I have to change the default value of one of those parameters, I need to

Answer 1

I use hudson with ant and set parameters (customer) in my hudson job. This parameter is then the name of a property file that i open with ant as follow:

 srcFile="${project.dir}/build/resources/${customer}.properties"/>