后端给了我这样一个map的集合 {json=[{"drug_id":"16","time":"2018-12-20","name":"阿卡波糖","times":"1"},{"drug_id":"17","time":"2018-12-20","name":"苯乙双胍","times":"1"}], time=2018-12-20}我前端怎样才能拿到json里面的值