转换通量<Map<K, V> &gt; 进入列表<V>

Question

我想知道如何在 spring reactor 中将Flux<Map<K, V>转换为List<V> 。

Answer 1

通常，对于 Flux 实例，您可以执行以下操作：

List<Object> myList = flux.collectSortedList().block();

Answer 2

A Flux<Map<K, V>> can emit any number of maps (0..infinity values).

final List<V> values = flux
    .flatMapIterable(Map::values) // extract a concatenated list of all values
                                  // it transforms List<Collection<V>> into Collection<V>
                                  // but keeps it wrapped in a Flux instance
    .collectList() // transforms Flux<T> into Mono<List<T>>
    .block(); // blocks indefinitely, until the value is available and returns the value