jsp数据库连接mysql

<%@ page import="java.sql.*" %>
<%
    String url = "jdbc:mysql://localhost:3306/mydatabase";
    String username = "root";
    String password = "mypassword";
    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;
    try {
        Class.forName("com.mysql.cj.jdbc.Driver"); // 加载MySQL驱动
        conn = DriverManager.getConnection(url, username, password); // 获取数据库连接
        stmt = conn.createStatement(); // 创建Statement对象
        rs = stmt.executeQuery("SELECT * FROM mytable"); // 执行查询语句
        while (rs.next()) {
            out.println(rs.getString("columnName")); // 输出查询结果
        }
    } catch (ClassNotFoundException e) {
        out.println("找不到MySQL驱动程序");
    } catch (SQLException e) {
        out.println("数据库连接失败：" + e.getMessage());
    } finally {
        try {
            if (rs != null) rs.close();
            if (stmt != null) stmt.close();
            if (conn != null) conn.close();
        } catch (SQLException e) {
            out.println("关闭数据库连接失败：" + e.getMessage());
        }
    }
%>