如何获取 JSONObject 中的列表项？

Question

我的 JSON 应该是这样的。

{"zip":123, "people":[{"firstname":"Thomas", "lastname":"Tatum"},
{"firstname":"Drew", "lastname":"Uncle"}]}

(I am using import org.json.JSONObject)

我有一个 MutableList，列表中有 Person（这是一个数据 class，有名字和姓氏）。但我不知道如何让 JSON 对象中的列表项适合 json（见下文）。

val json = JSONObject(
            mapOf(
                "zip" to 123,
                "people" to //I don't know how to get my values here
            )
        )

也许有人可以帮助我。

Answer 1

你可以这样做

import org.json.JSONObject

data class Person(val firstname: String, val lastname: String)

fun main() {
    val people = arrayOf(Person("Thomas", "Tatum"), Person("Drew", "Uncle")) //also works for Lists, doesn't need to be an array
    val json = JSONObject(
        mapOf(
            "zip" to 123,
            "people" to people,
        )
    )
    println(json)
    //prints: {"zip":123,"people":[{"firstname":"Thomas","lastname":"Tatum"},{"firstname":"Drew","lastname":"Uncle"}]}
}

如何获取 JSONObject 中的列表项？

How to get listitems in JSONObject?

json

kotlin