页面跳转

render(view: "user_timeline", model: [ user: user ])

redirect(action:'timeline')

redirect(controller: 'post', action:'timeline', id: newUser.userId)

redirect(controller: 'post', action:'timeline',params: [fullName: newUser.profile.fullName,email: newUser.profile.email ])

redirect(uri: '/post/timeline')

redirect(url: 'http://www.google.com?q=hubbub')