javaweb连接mysql

Class.forName("com.mysql.cj.jdbc.Driver");

String url = "jdbc:mysql://localhost:3306/mydatabase?useSSL=false&serverTimezone=UTC";
String user = "root";
String password = "password";
Connection conn = DriverManager.getConnection(url, user, password);

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) {
        String url = "jdbc:mysql://localhost:3306/mydatabase?useSSL=false&serverTimezone=UTC";
        String user = "root";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery("SELECT * FROM users")) {

            while (rs.next()) {
                System.out.println(rs.getString("username"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}