Spring Cloud Gateway网关下Knife4j文档聚合,以及动态路由的读取和代码配置

import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.filter.FilterDefinition;
import org.springframework.cloud.gateway.handler.predicate.PredicateDefinition;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import reactor.core.publisher.Flux;
 
@Configuration
public class GatewayConfig {
 
    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
        return builder.routes()
                .route("path_route", r -> r.path("/api/test")
                        .uri("http://localhost:8081")
                        .order(1)
                        .filters(f -> f.addResponseHeader("X-Response-Default", "Default-Header-Value"))
                        .id("test_route")
                )
                .build();
    }
 
    @Bean
    public PredicateDefinition customPredicate() {
        PredicateDefinition predicate = new PredicateDefinition();
        predicate.setName("Path");
        predicate.addArg(Collections.singletonMap("pattern", "/api/**"));
        return predicate;
    }
 
    @Bean
    public FilterDefinition customFilter() {
        FilterDefinition filter = new FilterDefinition();
        filter.setName("AddResponseHeader");
        filter.addArg(Collections.singletonMap("name", "X-Response-Custom"));
        filter.addArg(Collections.singletonMap("value", "Custom-Header-Value"));
        return filter;
    }
}

这个配置类定义了一个自定义的路由定位器，它会将匹配 /api/test 路径的请求转发到 http://localhost:8081，并添加了一个自定义的响应头。同时，它展示了如何定义一个路径匹配的断言和一个响应头的过滤器。这些定义可以用于动态路由和过滤的配置，在Spring Cloud Gateway中，它们可以和配置服务器结合，实现动态路由的管理。