grails logout 跳转别的页面

import org.codehaus.groovy.grails.plugins.springsecurity.SpringSecurityUtils


class LogoutController {

        def userService
	/**
	 * Index action. Redirects to the Spring security logout uri.
	 */
	def index = {
               
                if(params.redirect){
                    redirect uri: SpringSecurityUtils.securityConfig.logout.filterProcessesUrl+ "?spring-security-redirect="+params.redirect
                    return
                }
		// TODO  put any pre-logout code here
		redirect uri: SpringSecurityUtils.securityConfig.logout.filterProcessesUrl // '/j_spring_security_logout'
	}
}