Gateway获取下游最终响应码

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class DownstreamStatusLogFilter implements GlobalFilter, Ordered {

@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    return chain.filter(exchange)
            .doAfterTerminate(() -> {
                // 获取最终的响应状态码
                HttpStatus status = exchange.getResponse().getStatusCode();
                if (status != null) {
                    System.out.println("下游状态码: " + status.value());
                }
            });
}

@Override
public int getOrder() {
    return Ordered.LOWEST_PRECEDENCE; // 确保最后执行
}

}