@WebFilter(urlPatterns = "/*")
@Order(value = 1)
public class TestFilter implements Filter {
 
  private static final Set<String> ALLOWED_PATHS = Collections.unmodifiableSet(new HashSet<>(
      Arrays.asList("/main/excludefilter", "/login", "/logout", "/register")));
  @Override
  public void init(FilterConfig filterConfig) throws ServletException {
    System.out.println("init-----------filter");
  }
 
  @Override
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;
    String path = request.getRequestURI().substring(request.getContextPath().length()).replaceAll("[/]+$", "");
    boolean allowedPath = ALLOWED_PATHS.contains(path);
 
    if (allowedPath) {
      System.out.println("這里是不需要處理的url進入的方法");
      chain.doFilter(req, res);
    }
    else {
      System.out.println("這里是需要處理的url進入的方法");
    }
  }
 
  @Override
  public void destroy() {
    System.out.println("destroy----------filter");
  }
}