spring cloud gateway 获取请求url

在Spring Cloud Gateway中，您可以通过ServerWebExchange对象获取请求URL。ServerWebExchange是Spring WebFlux的一部分，用于代表客户端请求和服务器响应。您可以通过以下方式访问它：

@Component
public class ExampleFilter implements GatewayFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        URI requestUri = exchange.getRequest().getURI();
        // do something with the request URI
        return chain.filter(exchange);
在RoutePredicateHandlerMapping中注入ServerWebExchange，并从中获取请求URL。
@Component
public class ExamplePredicateHandlerMapping implements RoutePredicateHandlerMapping {
    @Override
    public Mono<HandlerResult<URI>> map(ServerWebExchange exchange) {
        URI requestUri = exchange.getRequest().getURI();
        // do something with the request URI
        return Mono.just(HandlerResult.of(requestUri));
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