golang根据不同返回解析不同结构的json

// 数据源

{"type":"a_number", "data":{"somenumber":1234}}

{"type":"b_string", "data":{"somestring":"a string", "anotherstring": "a second string"}}`

type Head struct {

    Type  string `json:"type"`

    Data json.RawMessage `json:"data"`

}





var msg Head



json.Unmarshal([]byte(jsonString), &msg)



switch msg.Type {

    case "a_number":

        var detail A

        json.Unmarshal([]byte(msg.Data),&detail)

        fmt.Println(detail.SomeNumber)

    case "b_string":

        var detail B

        json.Unmarshal([]byte(msg.Data),&detail)

        fmt.Println(detail.SomeString)

    default:

        fmt.Printf("I don't know about type %s!\n",  msg.Type)

}