jsp修改mysql

<%@ page import="java.sql.*" %>
<%
    String url = "jdbc:mysql://localhost:3306/mydatabase";
    String username = "root";
    String password = "password";

    Connection conn = null;
    PreparedStatement pstmt = null;

    try {
        Class.forName("com.mysql.cj.jdbc.Driver");
        conn = DriverManager.getConnection(url, username, password);

        String sql = "UPDATE users SET name = ? WHERE id = ?";
        pstmt = conn.prepareStatement(sql);
        pstmt.setString(1, "New Name");
        pstmt.setInt(2, 1);

        int rowsUpdated = pstmt.executeUpdate();
        out.println("Rows updated: " + rowsUpdated);
    } catch (ClassNotFoundException e) {
        out.println("MySQL JDBC Driver not found!");
    } catch (SQLException e) {
        out.println("SQL Exception: " + e.getMessage());
    } finally {
        try {
            if (pstmt != null) pstmt.close();
            if (conn != null) conn.close();
        } catch (SQLException e) {
            out.println("Error closing resources: " + e.getMessage());
        }
    }
%>