mysql 格式化bigdecimal

import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

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

        String sql = "INSERT INTO example (amount) VALUES (?)";
        try (Connection connection = DriverManager.getConnection(url, user, password);
             PreparedStatement pstmt = connection.prepareStatement(sql)) {

            BigDecimal amount = new BigDecimal("123456789.123456");
            pstmt.setBigDecimal(1, amount);
            pstmt.executeUpdate();
            System.out.println("Data inserted successfully.");

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