Java 将map 拆分成多个map工具类

转自 https://blog.csdn.net/q1534894305/article/details/108364758

 

开箱即用，无副作用

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/** * 将map 拆分成多个map * * @param chunkMap 被拆的 map * @param chunkNum 每段的大小 * @param <k> map 的 key类 型 * @param <v> map 的value 类型 * @return List */ public static <k, v> List<LinkedHashMap<k, v>> mapChunk(LinkedHashMap<k, v> chunkMap, int chunkNum) { if (chunkMap == null || chunkNum <= 0) { List<LinkedHashMap<k, v>> list = new ArrayList<>(); list.add(chunkMap); return list; } Set<k> keySet = chunkMap.keySet(); Iterator<k> iterator = keySet.iterator(); int i = 1; List<LinkedHashMap<k, v>> total = new ArrayList<>(); LinkedHashMap<k, v> tem = new LinkedHashMap<>(); while (iterator.hasNext()) { k next = iterator.next(); tem.put(next, chunkMap.get(next)); if (i == chunkNum) { total.add(tem); tem = new LinkedHashMap<>(); i = 0; } i++; } if (!CollectionUtils.isEmpty(tem)) { total.add(tem); } return total; }