如何在Spring集成中使用JAVA配置创建http入站通道适配器？

@Configuration
public class HttpInboundAdapterConfig {

    @Bean
    public HttpInboundChannelAdapter httpInboundChannelAdapter() {
        String url = "http://example.com/api";
        HttpMethod httpMethod = HttpMethod.GET;

        HttpInboundChannelAdapter adapter = new HttpInboundChannelAdapter(url, httpMethod);
        adapter.setOutputChannel(httpInboundChannel());
        adapter.setRequestPayloadTypeClass(String.class);

        return adapter;
    }

    @Bean
    public MessageChannel httpInboundChannel() {
        return new DirectChannel();
    }

    @Bean
    public MessageHandler httpInboundMessageHandler() {
        return message -> {
            // 处理接收到的HTTP请求
            String payload = (String) message.getPayload();
            // ...
        };
    }

    @Bean
    public IntegrationFlow httpInboundFlow() {
        return IntegrationFlows.from(httpInboundChannelAdapter())
                .handle(httpInboundMessageHandler())
                .get();
    }
}