部分JSON解组到Go中的映射中

Question

{
    "sendMsg":{"user":"ANisus","msg":"Trying to send a message"},
    "say":"Hello"
}

有没有使用“encoding/json”包来完成此操作的简单方法？

package main

import (
    "encoding/json"
    "fmt"
)

// the struct for the value of a "sendMsg"-command
type sendMsg struct {
    user string
    msg  string
}
// The type for the value of a "say"-command
type say string

func main(){
    data := []byte(`{"sendMsg":{"user":"ANisus","msg":"Trying to send a message"},"say":"Hello"}`)

    // This won't work because json.MapObject([]byte) doesn't exist
    objmap, err := json.MapObject(data)

    // This is what I wish the objmap to contain
    //var objmap = map[string][]byte {
    //  "sendMsg": []byte(`{"user":"ANisus","msg":"Trying to send a message"}`),
    //  "say": []byte(`"hello"`),
    //}
    fmt.Printf("%v", objmap)
}

谢谢任何建议/帮助！

Answer 1

这可以通过解封到映射[string]json.rawmessage中来实现。

var objmap map[string]json.RawMessage
err := json.Unmarshal(data, &objmap)

要进一步解析sendmsg，可以执行以下操作：

var s sendMsg
err = json.Unmarshal(objmap["sendMsg"], &s)

对于say，您可以执行相同的操作并解封为字符串：

var str string
err = json.Unmarshal(objmap["say"], &str)

type sendMsg struct {
    User string
    Msg  string
}