jsp更新mysql数据库数据库

<%@ 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.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();

        if (rowsUpdated > 0) {
            out.println("Record updated successfully!");
        } else {
            out.println("No record found to update.");
        }
    } catch (ClassNotFoundException | SQLException e) {
        out.println("Error: " + e.getMessage());
    } finally {
        if (pstmt != null) {
            try {
                pstmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
%>