java 8 CompletableFuture 实现异步多线程调用，完成后合并返回

   List<CompletableFuture> futureList = new ArrayList<>();
　　List<Info> resultList = new ArrayList<>();
   for (int i=1;i<pageSize;i++){
       // 启线程查， 使用定长线程池
       int j = i;
       CompletableFuture<List<Map<String, Object>>> future1 = CompletableFuture.supplyAsync(()->{
           param.put("page", j+1);
        log.info("url===>" + url);
           log.info("param===>{}", JSON.toJSONString(param));
           String respInner = myHttpClient.doPost(url, JSON.toJSONString(param));
           JSONObject jsonInner = JSON.parseObject(respInner);
           String resultInner = jsonInner.getString("result");
           JSONObject jsonResultInner = JSON.parseObject(resultInner);
           String listStrInner = jsonResultInner.getString("list");
           List<Map<String, Object>> listMapInner = JSON.parseObject(listStrInner, List.class);
           return listMapInner;
       },ThreadPoolUtils.getScheduledExec());

    future1.thenAccept(results -> {
     resultLists.addAll(results);
    });
       futureList.add(future1);
   }
   // 合并任务
CompletableFuture<Void> combinedFutures = CompletableFuture.allOf(futureList.toArray(new CompletableFuture[futureList.size()]));

   // 等待执行
combinedFutures.whenComplete((v,th)->{
  System.out.println("all completed");
}).join();