多层嵌套json递归解析工具类

下面是一个简单的工具类，可以递归解析多层嵌套的 JSON 数据：

import org.json.JSONArray;
import org.json.JSONObject;

public class JsonParser {
    public static void parse(JSONObject json) {
        for (String key : json.keySet()) {
            Object value = json.get(key);
            if (value instanceof JSONObject) {
                System.out.println("Object: " + key);
                parse((JSONObject) value);
            } else if (value instanceof JSONArray) {
                System.out.println("Array: " + key);
                parseArray((JSONArray) value);
            } else {
                System.out.println(key + ": " + value.toString());
            }
        }
    }

    private static void parseArray(JSONArray array) {
        for (int i = 0; i < array.length(); i++) {
            Object value = array.get(i);
            if (value instanceof JSONObject) {
                System.out.println("Object: " + i);
                parse((JSONObject) value);
            } else if (value instanceof JSONArray) {
                System.out.println("Array: " + i);
                parseArray((JSONArray) value);
            } else {
                System.out.println(i + ": " + value.toString());
            }
        }
    }
}

使用示例：

public class TestJsonParser {
    public static void main(String[] args) {
        String jsonStr = "{\"name\":\"John\",\"age\":30,\"cars\":[{\"name\":\"Ford\",\"models\":[\"Fiesta\",\"Focus\",\"Mustang\"]},{\"name\":\"BMW\",\"models\":[\"320\",\"X3\",\"X5\"]}],\"address\":{\"street\":\"Downing Street 10\",\"city\":\"London\"}}";
        JSONObject json = new JSONObject(jsonStr);
        JsonParser.parse(json);
    }
}

输出结果：

name: John
age: 30
Array: cars
Object: 0
name: Ford
Array: models
0: Fiesta
1: Focus
2: Mustang
Object: 1
name: BMW
Array: models
0: 320
1: X3
2: X5
Object: address
street: Downing Street 10
city: London