如何从转换为对象的对象的completablefuture列表中获得结果？

Question

我有一份即将加入的可完成期货的清单，以同时获得所有结果。我使用了CompletableFuture.allOf()。但是，使用此结果可以输入CompletableFuture<List<Object>>。我需要将其转换为我创建的对象。我想从API调用返回结果。我该怎么办？

在过去的两天中，我已经对所有示例进行了研究，但仍然找不到解决方法。

public CompletableFuture<ResponseEntity<Bmwvehiclemain>> getVehicle(String rfidtag){
    ExecutorService vehicleRequestExecutor = Executors.newFixedThreadPool(50);
    String url="";
    String authString= "user"+":"+"password";
    byte[] encodedAuth= Base64.encodeBase64(authString.getBytes(Charset.forName("US-ASCII")));
    String authHeader="Basic "+new String(encodedAuth);
    HttpHeaders headers = new HttpHeaders();
    headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
    headers.set("Authorization", authHeader);
    HttpEntity<Bmwvehiclemain> requestEntity=new HttpEntity <Bmwvehiclemain>(headers);
    Bmwvehiclemain v=new Bmwvehiclemain("notindb");


    CompletableFuture<ResponseEntity<Bmwvehiclemain>> future= CompletableFuture
        .supplyAsync(()-> appRestTemplate.exchange(url + rfidtag, HttpMethod.GET, requestEntity, Bmwvehiclemain.class), vehicleRequestExecutor)
        .thenApply((responseEntity)->{
            return responseEntity;
        })
        .exceptionally(ex ->{
            return new ResponseEntity<>(v, HttpStatus.OK);
        });

    return future;
}

public void vehicleRequests(List<Maybevehicle> vehicles){

    List<CompletableFuture<?>> completableFutures = new ArrayList<>(vehicles.size());
    List<Bmwvehiclemain> foundVehs= new ArrayList<>();

    for (Maybevehicle v : vehicles) { 
        CompletableFuture<?> requestCompletableFuture=getVehicle(v.getB().getRfidtag());
        if (requestCompletableFuture !=null){
            completableFutures.add(requestCompletableFuture);
        } 
    }
    try {
        CompletableFuture<Void> allFutures=CompletableFuture.allOf(completableFutures.toArray(new CompletableFuture[completableFutures.size()])); /
        CompletableFuture<List<Object>> allPageContentsFuture = allFutures.thenApply(future -> {
            return completableFutures.stream()
                .map(completableFuture -> completableFuture.join())
                .collect(Collectors.toList());
        });
    } catch (CompletionException | NullPointerException | InterruptedException e){
        e.printStackTrace();
    } 
}       

我想从API rest模板调用返回结果。我希望将结果添加到Bmwvehiclemain对象列表中。