mysql数据库的创建和连接

import java.sql.*;

public class MySQLConnection {
    public static void main(String[] args) {
        try {
            // 加载数据库驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 创建数据库连接
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String username = "root";
            String password = "password";
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 执行SQL查询
            Statement statement = connection.createStatement();
            String query = "SELECT * FROM mytable";
            ResultSet resultSet = statement.executeQuery(query);
            
            // 处理查询结果
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }
            
            // 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}