java框架如何防御拒绝服务攻击

// 设置最大登录尝试次数
security.addFilter(new CsrfFilter());
security.addFilter(new UsernamePasswordAuthenticationFilter(authenticationManager(), context));
security.addFilter(new ProviderManager(providers, eventPublisher));
security.addFilterAfter(new AbstractAuthenticationProcessingFilter("/login") {
    @Override
    protected void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
        attemptAuthentication(request, response);
        chain.doFilter(request, response);
    }
}, CsrfFilter.class);
security.addFilterAfter(new LogoutFilter(, "/logout"), UsernamePasswordAuthenticationFilter.class);

// 设置重试次数限制
ini.setSecurityManager(securityManager());
ini.setGlobalSessionTimeout(millis);
ini.setLoginUrl("/login");
ini.setSuccessUrl("/home");
ini.setUnauthorizedUrl("/unauthorized");
ini.setLogoutUrl("/logout");
ini.setRememberMeEnabled(true);

// 启用 CSRF 保护
security.csrf().disable();

// 限制最大登录尝试次数
security.maximumNumberOfAttempts(10);