读取ServerWebExchange Spring云网关的请求体

public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
    ServerHttpRequest request = exchange.getRequest();
    // 判断请求方法和内容类型
    if (request.getMethod() == HttpMethod.POST && MediaType.APPLICATION_JSON.equals(request.getHeaders().getContentType())) {
        // 读取请求体
        Mono<String> requestBody = exchange.getRequest().getBody()
                .map(buffer -> {
                    byte[] bytes = new byte[buffer.readableByteCount()];
                    buffer.read(bytes);
                    DataBufferUtils.release(buffer);
                    return new String(bytes, StandardCharsets.UTF_8);
                });

        // 处理请求体
        return requestBody.flatMap(body -> {
            // 在这里可以对请求体进行处理
            // ...

            // 继续处理请求
            return chain.filter(exchange);
        });
    }

    return chain.filter(exchange);
}