springboot实现异步批量发送Http请求数据至服务端

Spring Boot提供了异步编程的支持，我们可以使用它来实现异步批量发送Http请求数据至服务端。具体步骤如下：

1. 创建一个异步的RestTemplate Bean

@Bean
public RestTemplate asyncRestTemplate() {
    HttpComponentsAsyncClientHttpRequestFactory factory = new HttpComponentsAsyncClientHttpRequestFactory();
    factory.setConnectTimeout(5000);
    factory.setReadTimeout(5000);
    return new RestTemplate(factory);
}

2. 使用异步RestTemplate发送Http请求

@Autowired
private RestTemplate asyncRestTemplate;

public ListenableFuture<ResponseEntity<String>>[] send(List<String> urls, List<String> payloads) {
    ListenableFuture<ResponseEntity<String>>[] futures = new ListenableFuture[urls.size()];
    for (int i = 0; i < urls.size(); i++) {
        String url = urls.get(i);
        String payload = payloads.get(i);
        HttpEntity<String> entity = new HttpEntity<>(payload);
        futures[i] = asyncRestTemplate.postForEntity(url, entity, String.class);
    }
    return futures;
}

3. 使用CompletableFuture处理异步请求结果

List<String> urls = Arrays.asList("http://localhost:8080/api/1", "http://localhost:8080/api/2");
List<String> payloads = Arrays.asList("payload1", "payload2");
ListenableFuture<ResponseEntity<String>>[] futures = send(urls, payloads);
CompletableFuture.allOf(futures).join();
for (ListenableFuture<ResponseEntity<String>> future : futures) {
    ResponseEntity<String> response = future.get();
    // 处理响应结果
}

这样就可以实现异步批量发送Http请求数据至服务端了。