在Spring Cloud Gateway中，可以通過配置限流規(guī)則來實(shí)現(xiàn)請(qǐng)求限流。具體步驟如下：

1. 在application.yml或application.properties文件中添加以下配置：

spring:
  cloud:
    gateway:
      routes:
      - id: my_route
        uri: http://example.com
        predicates:
        - Path=/some_path
        filters:
        - name: HttpRequestFilter
          args:
            requestRateLimit: 100 // 限制每秒最多100個(gè)請(qǐng)求
            timeout: 500 // 設(shè)置請(qǐng)求超時(shí)時(shí)間為500毫秒

1. 創(chuàng)建一個(gè)名為HttpRequestFilter的過濾器類，實(shí)現(xiàn)org.springframework.cloud.gateway.filter.http.HttpRequestFilter接口，并重寫rateLimit方法，設(shè)置請(qǐng)求速率限制規(guī)則。例如：

import org.springframework.cloud.gateway.filter.http.HttpRequestFilter;
import org.springframework.stereotype.Component;

@Component
public class RateLimitFilter implements HttpRequestFilter {

    private final int rateLimit = 100; // 設(shè)置速率限制為100次/秒

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, ProxyFilterChain chain) {
        return chain.filter(exchange);
    }

    @Override
    public Mono<Void> rateLimit(ServerWebExchange exchange, Predicate<? super ServerHttpRequest>> predicate) {
        return exchange.getAttribute(Constants.RATE_LIMIT_ATTRIBUTE)
                .map(value -> value <= this.rateLimit)
                .flatMap(isAllowed -> isAllowed ? chain.filter(exchange) : Mono.empty());
    }
}

1. 在application.yml或application.properties文件中添加以下配置：

spring:
  cloud:
    gateway:
      routes:
      - id: my_route
        uri: http://example.com
        filters:
        - name: RateLimitFilter
          className: com.example.RateLimitFilter

1. 啟動(dòng)Spring Cloud Gateway應(yīng)用，然后訪問http://localhost:8080/my_route/some_path，可以看到請(qǐng)求速率限制為每秒最多100個(gè)請(qǐng)求。