如何防止地图排序？

I have a map

{
"m_key": 123,
"z_key": 123,
"a_key": 123,
"f_key": 123
}

When i'm trying to make a json from it and print it my json becomes sorted by key and i get json:

{
"a_key": 123,
"f_key": 123,
"m_key": 123,
"z_key": 123
}

To answer the original question use an ordered map

package main

import (
    "encoding/json"
    "fmt"
    "github.com/iancoleman/orderedmap"
)

func main() {

    o := orderedmap.New()

    // use Set instead of o["a"] = 1

    o.Set("m_key", "123") // go json.Marshall doesn't like integers
    o.Set("z_key", "123")
    o.Set("a_key", "123")
    o.Set("f_key", "123")

    // serialize to a json string using encoding/json
    prettyBytes, _ := json.Marshal(o)
    fmt.Printf("%s", prettyBytes)
}

But according the spec https://json-schema.org/latest/json-schema-core.html#rfc.section.4.2 there is no guarantee that the ordering of maps is honoured, so it's probably better to use an array instead for json output

   // convert to array
    fmt.Printf("


")
    arr := make([]string, 8)
    c := 0
    for _, k := range o.Keys() {
            arr[c] = k
            c++
            v, _ := o.Get(k)
            arr[c], _ = v.(string)
            c++
    }

    morePretty, _ := json.Marshal(arr)
    fmt.Printf("%s", morePretty)

When the array is reloaded it will be in the correct order