资源整合：Java 将map 拆分成多个map工具类

开箱即用，无副作用

/**
 * 将map 拆分成多个map
 *
 * @param chunkMap 被拆的 map
 * @param chunkNum 每段的大小
 * @param       map 的 key类 型
 * @param       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;
}