For following JSON
{ "Jon": { "Age": 15 }, "Mary": { "Age": 17 } } how can i map it into golang struct, normally, the structure will be
type Person struct { Name string `json:??,string` Age int `json:Age, int` } as the json field name is the attribute of struct, thank you in advance.
You have to use custom JSON marshalling
package main import ( "encoding/json" "log" "fmt" ) type Person struct { Name string `json:??,string` Age int `json:Age, int` } type People map[string]*Person func (p *People) UnmarshalJSON(data []byte) error { var transient = make(map[string]*Person) err := json.Unmarshal(data, &transient) if err != nil { return err } for k, v := range transient { v.Name = k (*p)[k] = v } return nil } func main() { jsonInput := ` { "Jon": { "Age": 15 }, "Mary": { "Age": 17 } } ` var people People = make(map[string]*Person) err := people.UnmarshalJSON([]byte(jsonInput)) if err != nil { log.Fatal(err) } for _, person := range people { fmt.Printf("%v -> %v\n", person.Name, person.Age) } } 
UnmarshalJSON function