如何拿到[]interface{}里面有的map

```go package main import ( "net/http" "io/ioutil" "encoding/json" "fmt" ) func main() { addr := "http://wthrcdn.etouch.cn/weather_mini?city=上海" resp, err := http.Get(addr) defer resp.Body.Close() if err != nil { panic(err) } b, err := ioutil.ReadAll(resp.Body) var v map[string]interface{} json.Unmarshal(b, &v) v1 := (v["data"]).(map[string]interface{}) v2 := v1["forecast"] fmt.Println(v2) } ``` ===================到最后是一个[]interface{}======================= [map[type:晴 date:19日星期四 high:高温 27℃ fengli:<![CDATA[<3级]]> low:低温 16℃ fengxiang:东南风] map[date:20日星期五 high:高温 27℃ fengli:<![CDATA[3-4级]]> low:低温 17℃ fengxiang:东南风 type:晴] map[type:多云 date:21日星期六 high:高温 27℃ fengli:<![CDATA[3-4级]]> low:低温 19℃ fengxiang:东南风] map[date:22日星期天 high:高温 25℃ fengli:<![CDATA[<3级]]> low:低温 15℃ fengxiang:东南风 type:小雨] map[date:23日星期一 high:高温 21℃ fengli:<![CDATA[3-4级]]> low:低温 13℃ fengxiang:西北风 type:中雨]] ========================================================== 想不到怎么处理了， 求解