jsp更新mysql数据库

<%@ page import="java.sql.*" %>
<%
    String url = "jdbc:mysql://localhost:3306/mydatabase";
    String username = "root";
    String password = "mypassword";
    
    Connection conn = null;
    Statement stmt = null;
    
    try {
        // 加载JDBC驱动
        Class.forName("com.mysql.jdbc.Driver");
        
        // 建立数据库连接
        conn = DriverManager.getConnection(url, username, password);
        
        // 创建Statement对象
        stmt = conn.createStatement();
        
        // 执行更新操作
        String sql = "UPDATE users SET age = 30 WHERE id = 1";
        int rowsUpdated = stmt.executeUpdate(sql);
        
        // 输出更新结果
        out.println("Rows updated: " + rowsUpdated);
    } catch (ClassNotFoundException | SQLException e) {
        // 处理异常
        out.println("Error: " + e.getMessage());
    } finally {
        // 关闭资源
        try {
            if (stmt != null) stmt.close();
            if (conn != null) conn.close();
        } catch (SQLException e) {
            out.println("Error closing resources: " + e.getMessage());
        }
    }
%>