json字符串：

 

{"sn":1,"ls":false,"bg":0,"ed":0,"ws":[{"bg":0,"cw":[{"sc":0,"w":"还"}]},{"bg":0,"cw":[{"sc":0,"w":"有点"}]},{"bg":0,"cw":[{"sc":0,"w":"眼熟"}]}]}

 

需要将json格式中的w字段取出来，并且拼成结果串进行展示

1. 从json数组中获取ws
2. ws是数组，数组元素为object
3. cw是数组，数组元素为object
4. w是string
5. 从cw遍历获取w字段

解析代码：

 

func RecResultJsonToPlain() {    var recResult string    var dat map[string]interface{}    json.Unmarshal([]byte(json_str), &dat)    if v, ok := dat["ws"]; ok {        ws := v.([]interface{})        for i, wsItem := range ws {            wsMap := wsItem.(map[string]interface{})            if vCw, ok := wsMap["cw"]; ok {                cw := vCw.([]interface{})                for i, cwItem := range cw {                    cwItemMap := cwItem.(map[string]interface{})                    if w, ok := cwItemMap["w"]; ok {                        recResult = recResult + w.(string)                    }                }            }        }    }    fmt.Println(recResult)}