问题描述
@WebFilter(filterName = “ssoFilter”,urlPatterns = “/*”)配置

@Order中的value越小，优先级越高。
解决方法一:
在springboot启动类上添加
@ServletComponentScan(basePackages = “com.package.path”)

解决方法二：
手动配置bean（推荐这种方式，可以在FilterRegistrationBean里设置Order）不需要@WebFilter注解

java">package com.zhkj.saas.ims.lnterceptor;import com.zhkj.saas.ims.controller.ProxyController;import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;/*** @author lvyuanjun* @date 2023/4/26 15:27*/
public class ChannelFilter implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {try {ServletRequest requestWrapper = null;if (request instanceof HttpServletRequest) {HttpServletRequest req = (HttpServletRequest) request;String requestURI = req.getRequestURI();boolean state = ProxyController.REQUEST_URI_DATA_AUTH_LIST.contains(requestURI);if(state){requestWrapper = new RequestParameterWrapper(req);}}if (requestWrapper == null) {chain.doFilter(request, response);} else {chain.doFilter(requestWrapper, response);}} catch (IOException e) {e.printStackTrace();} catch (ServletException e) {e.printStackTrace();}}@Overridepublic void destroy() {}
}

java">@Configuration
public class WebAuthFilterConfig {@Beanpublic FilterRegistrationBean webAuthFilterRegistration() {FilterRegistrationBean registration = new FilterRegistrationBean();registration.setFilter(loginFilter());registration.setName("ChannelFilter");registration.addUrlPatterns("/spu/*");registration.setOrder(0);return registration;}@Beanpublic Filter channelFilter() {return new ChannelFilter();}
}

尝试了如下几种情况:

1. Filter 实现类 + @WebFilter + @ServletComponentScan：正常urlpattern的Filter
2. Filter 实现类 + FilterRegistrationBean构造 + @Configuration：正常urlpattern的Filter，并且可以设置Order
3. 仅仅 Filter实现类 + @Component ：会注册一个urlpattern 为 /*的过滤器
4. 通过1、2、3可以得知，只要在Filter实现类上增加 @Component ，就会导致 1个正常urlpattern的filter+1个拦截/*的filter（由于@Component注解导致）