idea连接mysql数据库测试

import java.sql.*;

public class Main {
    public static void main(String[] args) {
        Connection connection = null;

        try {
            // 注册 MySQL JDBC 驱动程序
            Class.forName("com.mysql.jdbc.Driver");

            // 创建数据库连接
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String username = "root";
            String password = "password";
            connection = DriverManager.getConnection(url, username, password);

            // 进行数据库操作
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT * FROM mytable");

            while (resultSet.next()) {
                // 处理结果集
                String column1Value = resultSet.getString("column1");
                String column2Value = resultSet.getString("column2");
                System.out.println(column1Value + " - " + column2Value);
            }

            // 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}