jsp权限管理系统

// 示例代码：权限检查过滤器
@WebFilter("/secure/*")
public class AuthFilter implements Filter {
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        HttpSession session = req.getSession(false);
        if (session == null || session.getAttribute("user") == null) {
            res.sendRedirect(req.getContextPath() + "/login.jsp");
        } else {
            chain.doFilter(request, response);
        }
    }
    // 其他方法...
}

// 示例代码：刷新用户权限
public void updateUserPermissions(User user) {
    // 更新数据库中的权限信息
    userDao.updatePermissions(user);
    // 刷新会话中的权限
    HttpSession session = request.getSession();
    session.setAttribute("user", user);
}