Future怎么转换成CompletableFuture

可以使用CompletableFuture类的静态方法completedFuture()将Future对象转换为CompletableFuture对象。下面是两个示例代码，分别使用makeCompletableFuture()和transformDoneFuture()方法将Future对象转换为CompletableFuture对象：

// 使用makeCompletableFuture()方法将Future对象转换为CompletableFuture对象
public static CompletableFuture makeCompletableFuture(Future future) {
    return CompletableFuture.supplyAsync(() -> {
        try {
            return future.get();
        } catch (InterruptedException | ExecutionException e) {
            throw new RuntimeException(e);
        }
    });
}

// 使用transformDoneFuture()方法将Future对象转换为CompletableFuture对象
private static CompletableFuture transformDoneFuture(Future future) {
    return CompletableFuture.completedFuture(null).thenApplyAsync(v -> {
        try {
            return future.get();
        } catch (InterruptedException | ExecutionException e) {
            throw new RuntimeException(e);
        }
    });
}