java超市管理系统代码 mysql

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

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

        try (Connection conn = DriverManager.getConnection(url, username, password)) {
            String sql = "INSERT INTO products (name, price, stock) VALUES (?, ?, ?)";
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, "Apple");
            pstmt.setDouble(2, 5.99);
            pstmt.setInt(3, 100);

            int rowsInserted = pstmt.executeUpdate();
            if (rowsInserted > 0) {
                System.out.println("A new product was added successfully!");
            }
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }
    }
}