通过流并行执行多个查询

您可以利用

CompletableFuture

public String getResult() {    // Create Stream of tasks:    Stream<Supplier<List<String>>> tasks = Stream.of( () -> getServerListFromDB(), () -> getAppListFromDB(), () -> getUserFromDB());    List<List<String>> lists = tasks         // Supply all the tasks for execution and collect CompletableFutures         .map(CompletableFuture::supplyAsync).collect(Collectors.toList())         // Join all the CompletableFutures to gather the results         .stream()         .map(CompletableFuture::join).collect(Collectors.toList());    // Use the results. They are guaranteed to be ordered in the same way as the tasks    return getResult(lists.get(0), lists.get(1), lists.get(2));}