通过Java API获取数字列的小数位数和精度？

import java.sql.*;

public class Main {
    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)) {
            String sql = "SELECT * FROM mytable";
            Statement stmt = conn.createStatement();
            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);
                int scale = rsmd.getScale(i);
                int precision = rsmd.getPrecision(i);

                System.out.println("Column Name: " + columnName);
                System.out.println("Scale: " + scale);
                System.out.println("Precision: " + precision);
                System.out.println();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}