Change default homepage for a Grails application

You can set the default homepage for a Grails application by modifying the grails-app/conf/UrlMappings.groovy file. In a new Grails application this file will look like

class UrlMappings {
    static mappings = {
        "/$controller/$action?/$id?"{
            constraints {
                // apply constraints here
            }
        }
        "/"(view:"/index")
        "500"(view:'/error')
    }
}

Replace the line:

"/"(view:"/index")

with:

"/"(controller:'home', action:"/index")

This will result in the fact that when you start your Grails application and you enter the URL for your application it will trigger the HomeController and corresponding index action related to that controller.