parameters - Grails - How to remove multiple params from controller -

im new grails , using version of 2.1.1

i have been working params passing data view controller ie have submit url controller :

http://example.com/save?param1=one&param2=two&param3=three&param4=four 

and url handle save() in controller, use , passing param view. code this

redirect action: "index", params:params 

but when success redirect, param include (param1,param2, param3 & param4)

http://example.com/index?param1=one&param2=two&param3=three&param4=four 

i want have param1 in index view. remove param using :

params.remove("param2") params.remove("param3") params.remove("param4") 

is there way remove multiple params in grails?

if need 1 parameter, easiest way creating new object:

redirect action: "index", params: [param1: params.param1]