如何根据函数获取列名

import java.sql.*;

public class GetColumnNamesFromFunction {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, username, password);
             Statement stmt = conn.createStatement()) {
            String sql = "SELECT * FROM my_function()"; // 替换为你的函数调用语句
            ResultSet rs = stmt.executeQuery(sql);
            ResultSetMetaData rsmd = rs.getMetaData();

            int columnCount = rsmd.getColumnCount();
            for (int i = 1; i <= columnCount; i++) {
                String columnName = rsmd.getColumnName(i);
                System.out.println("Column " + i + ": " + columnName);
            }

            rs.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}