jsp获取mysql连接失败

String url = "jdbc:mysql://localhost:3306/mydatabase";
String user = "myuser";
String password = "mypassword";

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

GRANT ALL PRIVILEGES ON mydatabase.* TO 'myuser'@'localhost';

<%@ page import="java.sql.*" %>
<%
    String url = "jdbc:mysql://localhost:3306/mydatabase";
    String user = "myuser";
    String password = "mypassword";
    Connection conn = null;
    try {
        Class.forName("com.mysql.cj.jdbc.Driver");
        conn = DriverManager.getConnection(url, user, password);
        out.println("连接成功！");
    } catch (ClassNotFoundException e) {
        out.println("驱动程序未找到：" + e.getMessage());
    } catch (SQLException e) {
        out.println("连接失败：" + e.getMessage());
    } finally {
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                out.println("关闭连接失败：" + e.getMessage());
            }
        }
    }
%>