我想通过Java程序从JSON文件中获取数据来登录

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.io.FileReader;
import java.io.IOException;

public class LoginService {
    private static final String JSON_FILE_PATH = "path/to/json/file.json";

    public static void main(String[] args) {
        String username = "user123";
        String password = "pass123";

        boolean loginResult = login(username, password);
        if (loginResult) {
            System.out.println("登录成功");
        } else {
            System.out.println("登录失败");
        }
    }

    public static boolean login(String username, String password) {
        JsonObject jsonObject = readDataFromJson();
        if (jsonObject != null) {
            String storedUsername = jsonObject.get("username").getAsString();
            String storedPassword = jsonObject.get("password").getAsString();

            return storedUsername.equals(username) && storedPassword.equals(password);
        }
        return false;
    }

    public static JsonObject readDataFromJson() {
        try (FileReader reader = new FileReader(JSON_FILE_PATH)) {
            JsonParser parser = new JsonParser();
            return parser.parse(reader).getAsJsonObject();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}