动态截取集合字符串算法

int QUERYNUM = 30;

Map<Integer, List<Long>> resultMap = new TreeMap<>();
int size = resultList.size();	// 获取到集合list的长度

// 转为map
for (int i = 0; i < size; i++) {
int tem = i / QUERYNUM;	// 需要获取到一定的长度
List<Long> tempList = resultMap.get(tem);
if (tempList == null) {
tempList = new ArrayList<Long>();
}
tempList.add(resultList.get(i));
resultMap.put(tem, tempList);
}
// 循环遍历获取商品详情
for (List<Long> resList : resultMap.values()) {

}