|  |  | 
 |  |  | @Slf4j | 
 |  |  | public class UserTokenFilter implements Filter { | 
 |  |  |     @Override | 
 |  |  |     public void init(FilterConfig filterConfig) throws ServletException { | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     @Override | 
 |  |  |     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { | 
 |  |  |         HttpServletRequest httpRequest = (HttpServletRequest) servletRequest; | 
 |  |  |         String requestURI = httpRequest.getRequestURI(); | 
 |  |  |         HttpServletRequest request = (HttpServletRequest) servletRequest; | 
 |  |  |         HttpServletResponse response = (HttpServletResponse) servletResponse; | 
 |  |  |         String requestURI = request.getRequestURI(); | 
 |  |  |         // 检查请求是否为非过滤项 | 
 |  |  |         if (UserTokenNoFilter.urls != null && UserTokenNoFilter.urls.stream().anyMatch(url -> requestURI.startsWith(url))) { | 
 |  |  |             // 如果是非过滤项,直接调用下一个过滤器或servlet | 
 |  |  |             filterChain.doFilter(servletRequest, servletResponse); | 
 |  |  |         } else { | 
 |  |  |             // 如果不是非过滤项,执行过滤逻辑 | 
 |  |  |             HttpServletRequest request = (HttpServletRequest) servletRequest; | 
 |  |  |             HttpServletResponse response = (HttpServletResponse) servletResponse; | 
 |  |  |             String token = request.getHeader(Constant.UserTokenKeyInHeader); | 
 |  |  |             if(!StringUtils.isNullOrEmpty(token)){ | 
 |  |  |                 UserTokenContext.set(token); | 
 |  |  | 
 |  |  |             }else{ | 
 |  |  |                 PrintWriter pw = null ; | 
 |  |  |                 try { | 
 |  |  |                     BaseResponse<?> res = BaseResponseUtils.buildToLogin() ; | 
 |  |  |                     BaseResponse<?> res = BaseResponseUtils.buildToLogin(); | 
 |  |  |                     String jsonString = JSON.toJSONString(res); | 
 |  |  |                     response.setCharacterEncoding("UTF-8"); | 
 |  |  |                     response.setContentType("application/json; charset=utf-8"); | 
 |  |  | 
 |  |  |                 //response.sendRedirect("/error"); | 
 |  |  |             } | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |     @Override | 
 |  |  |     public void destroy() { | 
 |  |  |     } | 
 |  |  | } |