在spring boot中使用@WebFilter配置filter（包括排除URL）

@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("这里是不需要处理的url进入的方法");
            chain.doFilter(req, res);
        }
        else {
            System.out.println("这里是需要处理的url进入的方法");
        }
    }
 
    @Override
    public void destroy() {
        System.out.println("destroy----------filter");
    }
}

@Order中的value越小，优先级越高。

ALLOWED_PATHS

这个是一个集合，存放的是需要排出的URL，用来判断是否是需要排除的URL。

关于为什么SpringBoot中使用了@WebFilter但是过滤器却没有生效：一定要加上@Configuration注解，@Service其实也可以，其他类似。