怎样从mysql调用数据库连接

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class MySQLConnectionExample {
    public static void main(String[] args) {
        // 设置数据库连接信息
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        // 建立数据库连接
        Connection connection = null;
        try {
            connection = DriverManager.getConnection(url, username, password);

            // 执行数据库操作
            Statement statement = connection.createStatement();
            String query = "SELECT * FROM users";
            ResultSet resultSet = statement.executeQuery(query);

            // 处理查询结果
            while (resultSet.next()) {
                String name = resultSet.getString("name");
                int age = resultSet.getInt("age");
                System.out.println("Name: " + name + ", Age: " + age);
            }

            // 关闭数据库连接
            resultSet.close();
            statement.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}