如何在Go中制作嵌套的JSON响应？

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name    string `json:"name"`
    Age     int    `json:"age"`
    Address Address `json:"address"`
}

type Address struct {
    City    string `json:"city"`
    Country string `json:"country"`
}

func main() {
    person := Person{
        Name: "John",
        Age:  30,
        Address: Address{
            City:    "New York",
            Country: "USA",
        },
    }

    jsonData, err := json.Marshal(person)
    if err != nil {
        fmt.Println("JSON encoding error:", err)
        return
    }

    fmt.Println(string(jsonData))
}

{"name":"John","age":30,"address":{"city":"New York","country":"USA"}}