使用Java 8流对集合进行排序将其转换为Map

Collectors.toMap

Map<Long, String> map =     list.stream()        .sorted(Comparator.comparing(Building::getName))        .collect(Collectors.toMap(Building::getId,Building::getName));

如果要强制实例化Map实现，请使用以下命令：

Map<Long, String> map =     list.stream()        .sorted(Comparator.comparing(Building::getName))        .collect(Collectors.toMap(Building::getId, Building::getName, (v1,v2)->v1, linkedHashMap::new));