如何在Spring Cloud Gateway上指定逗号分隔的参数

Question

application.yml用于Spring Cloud Gateway应用程序。

使用两个过滤器，第一个检查请求中的授权标头，第二个检查该yaml中指定的角色。

spring:
  application:
    name: MultipleFilters
  cloud:
    gateway:
      routes:
        - id: meterset
          uri: http://localhost:9000/meterset
          predicates:
            - Path=/meterset
          filters:
            - name: AuthenticationFilter
            - name: RoleFilter
              args:
                role1: editor
                role2: viewer

自定义网关过滤器，用于根据yaml中指定的角色检查是否允许请求。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.GatewayFilterFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Component
public class RoleFilter implements GatewayFilterFactory<RoleFilter.Config> {

    private static final String VALUE = "value";

    @Override
    public GatewayFilter apply(Config config) {

        // exchange holds request, response and other server related Properties

        return (exchange, chain) -> {

            // get the request
            ServerHttpRequest request = exchange.getRequest();
            return chain.filter(exchange);
        };
    }


    // Edit the response on error
    private Mono<Void> onError(ServerWebExchange exchange, String err, HttpStatus httpStatus) {
        ServerHttpResponse response = exchange.getResponse();
        response.setStatusCode(httpStatus);
        return response.setComplete();
    }

    @Override
    public List<String> shortcutFieldOrder() {
        return Collections.singletonList(VALUE);
    }

    @Override
    public Config newConfig() {
        return new Config();
    }

    public static class Config {

        private List<String> value;
         private String role1;
        private String role2;

        public List<String> getValue() {
            return value;
        }

        public void setValue(List<String> value) {
            this.value = value;
        }

        public String getRole1() {
            return role1;
        }

        public void setRole1(String role1) {
            this.role1 = role1;
        }

        public String getRole2() {
            return role2;
        }

        public void setRole2(String role2) {
            this.role2 = role2;
        }

   }
}

我能够将各种争论作为键值对传递，有没有办法将参数指定为逗号分隔的值，例如 RoleFilter = viewer，编辑器