public static <K, V> Collector<Map<K, V>, ?, Map<K, List<V>>> reduceListMap() {
		return reduceListMap(HashMap::new);
	}
@Test
	public void reduceListMapTest() {
		final Set<Map<String, Integer>> nameScoreMapList = StreamUtil.of(
				// 集合内的第一个map，包含两个key value
				MapUtil.builder("苏格拉底", 1).put("特拉叙马霍斯", 3).build(),
				MapUtil.of("苏格拉底", 2),
				MapUtil.of("特拉叙马霍斯", 1),
				MapUtil.of("特拉叙马霍斯", 2)
		).collect(Collectors.toSet());
		// 执行聚合
		final Map<String, List<Integer>> nameScoresMap = nameScoreMapList.stream().collect(CollectorUtil.reduceListMap());

		assertEquals(MapUtil.builder("苏格拉底", Arrays.asList(1, 2))
						.put("特拉叙马霍斯", Arrays.asList(3, 1, 2)).build(),
				nameScoresMap);

		List<Map<String, String>> data = ListUtil.toList(
			MapUtil.builder("name", "sam").put("count", "80").map(),
			MapUtil.builder("name", "sam").put("count", "81").map(),
			MapUtil.builder("name", "sam").put("count", "82").map(),
			MapUtil.builder("name", "jack").put("count", "80").map(),
			MapUtil.builder("name", "jack").put("count", "90").map()
		);

		Map<String, Map<String, List<String>>> nameMap = data.stream()
			.collect(Collectors.groupingBy(e -> e.get("name"), CollectorUtil.reduceListMap()));
		assertEquals(MapUtil.builder("jack", MapUtil.builder("name", Arrays.asList("jack", "jack"))
				.put("count", Arrays.asList("80", "90")).build())
			.put("sam", MapUtil.builder("name", Arrays.asList("sam", "sam", "sam"))
				.put("count", Arrays.asList("80", "81", "82")).build())
			.build(), nameMap);
	}