jsp连接mysql数据库的方法

<%@ page import="java.sql.*" %>
<%
    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;
    try {
        // 加载JDBC驱动
        Class.forName("com.mysql.cj.jdbc.Driver");
        
        // 建立数据库连接
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";
        conn = DriverManager.getConnection(url, user, password);
        
        // 执行SQL查询
        stmt = conn.createStatement();
        String sql = "SELECT * FROM mytable";
        rs = stmt.executeQuery(sql);
        
        // 处理结果集
        while (rs.next()) {
            // 处理每一行数据
            String column1 = rs.getString("column1");
            int column2 = rs.getInt("column2");
            // ...
        }
    } catch (ClassNotFoundException | SQLException e) {
        e.printStackTrace();
    } finally {
        // 关闭连接
        try {
            if (rs != null) rs.close();
            if (stmt != null) stmt.close();
            if (conn != null) conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
%>