jsonobject怎樣讀取嵌套的json數(shù)據(jù)

小樊
273
2024-06-18 22:24:00
欄目: 編程語言

要讀取嵌套的JSON數(shù)據(jù),您可以通過遞歸的方式逐層讀取JSON對(duì)象中的嵌套數(shù)據(jù)。例如,假設(shè)您有以下嵌套的JSON數(shù)據(jù):

{
  "name": "John Doe",
  "age": 30,
  "address": {
    "street": "123 Main Street",
    "city": "New York",
    "country": "USA"
  }
}

您可以使用JSONObject類來讀取嵌套的JSON數(shù)據(jù)。以下是一個(gè)示例代碼,演示如何讀取上述JSON數(shù)據(jù)中的嵌套數(shù)據(jù):

import org.json.JSONObject;

public class Main {
    public static void main(String[] args) {
        String jsonString = "{\"name\": \"John Doe\", \"age\": 30, \"address\": {\"street\": \"123 Main Street\", \"city\": \"New York\", \"country\": \"USA\"}}";

        JSONObject jsonObject = new JSONObject(jsonString);

        String name = jsonObject.getString("name");
        int age = jsonObject.getInt("age");

        JSONObject addressObject = jsonObject.getJSONObject("address");
        String street = addressObject.getString("street");
        String city = addressObject.getString("city");
        String country = addressObject.getString("country");

        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        System.out.println("Street: " + street);
        System.out.println("City: " + city);
        System.out.println("Country: " + country);
    }
}

在上面的代碼中,我們首先將JSON字符串轉(zhuǎn)換為JSONObject對(duì)象,然后逐層讀取JSON數(shù)據(jù)中的嵌套數(shù)據(jù)。請(qǐng)注意,我們使用JSONObject類的getJSONObject()和getString()方法來獲取嵌套的JSON對(duì)象和字符串值。

通過遞歸的方式,您可以處理任意深度的嵌套JSON數(shù)據(jù)。

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