在Golang中将interface {}转换为struct(Convert interface{} to struct in Golang)

interface{}

Declare types that match the structure of your JSON data. Use structs for JSON objects and slices for JSON arrays:

type transform struct {
    // not enough information in question to fill this in.
}

type urlTransform struct {
    Item string
    Transform transform
}

var transforms []urlTransform

The field names must be exported (start with uppercase letter).

Unmarshal the JSON to the declared value:

err := json.Unmarshal(data, &transforms)

or

err := json.NewDecoder(reader).Decode(&transforms)