在没有Jackson的情况下将密钥从JSON数组中获取到列表中

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

import java.util.ArrayList;
import java.util.List;

public class JsonKeyExtractor {
    public static void main(String[] args) {
        String jsonString = "[{\"key\": \"key1\", \"value\": \"value1\"}, {\"key\": \"key2\", \"value\": \"value2\"}]";

        List<String> keys = extractKeysFromJson(jsonString);
        System.out.println(keys);
    }

    private static List<String> extractKeysFromJson(String jsonString) {
        List<String> keys = new ArrayList<>();

        JSONArray jsonArray = new JSONArray(jsonString);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObject = jsonArray.getJSONObject(i);
            String key = jsonObject.getString("key");
            keys.add(key);
        }

        return keys;
    }
}