如何从Android Studio的XAMPP数据库中获取用户id

import java.sql.*;

public class DatabaseHandler {
    private static final String DB_URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String DB_USER = "root";
    private static final String DB_PASSWORD = "";

    public static int getUserId(String username) {
        int userId = -1;

        try {
            // 连接数据库
            Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);

            // 执行查询语句
            String query = "SELECT id FROM users WHERE username = ?";
            PreparedStatement statement = conn.prepareStatement(query);
            statement.setString(1, username);
            ResultSet resultSet = statement.executeQuery();

            // 解析结果集
            if (resultSet.next()) {
                userId = resultSet.getInt("id");
            }

            // 关闭连接
            resultSet.close();
            statement.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return userId;
    }
}