jsp网站连接数据库要打开mysql吗

<%@ page import="java.sql.*" %>

<%
    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;

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

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

        // 执行SQL语句
        stmt = conn.createStatement();
        String sql = "SELECT * FROM mytable";
        rs = stmt.executeQuery(sql);

        // 处理结果集
        while (rs.next()) {
            String column1 = rs.getString("column1");
            int column2 = rs.getInt("column2");
            // 其他操作...
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        // 关闭数据库连接和资源
        try {
            if (rs != null) rs.close();
            if (stmt != null) stmt.close();
            if (conn != null) conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
%>