HttpReponse/render/render_to_res

直接上例子
render_to_response('weibologin/login.html', {'current_time': datetime.now(),'error':error1})
render(request, 'search.html', {'current_time': datetime.now()})
HttpReponse返回的直接是内容
HttpResponse(0)或HttpResponse(station_collection, content_type='application/json; charset=utf-8')