How to Unmarshal jSON with dynamic key which can't be captured as a `json` in struct: GOlang [duplicate]

问题

This question already has answers here:

How to parse/deserialize dynamic JSON (2 answers)

Closed 6 months ago.

I have this struct defined:

type X struct {
 A string `json:"a_known_string"`
 B string `json:"b_known_string"`
}

This sample JSON:

jsnStr := [read in from a file and printed out to confirm]

It is:

{
 "any string" : {
   "a_known_string" : "some value",
   "b_known_string" : "another value" 
 }
}

If it was just the struct, I could:

var x X
err := json.Unmarshal(jsnStr, &x)

But I need to capture that 'any string'. How do I do that please?

回答1:

Use a map:

var m map[string]X
err := json.Unmarshal([]byte(jsnStr), &m)

playground example

来源：https://stackoverflow.com/questions/35558039/how-to-unmarshal-json-with-dynamic-key-which-cant-be-captured-as-a-json-in-st