------工具类
public static <T> List<List<T>> groupingList(List<T> list, int partSize) {
List<List<T>> groups = new ArrayList();
if (list != null && !list.isEmpty()) {
int dataCount = list.size();
int groupCount = dataCount / partSize;
if (dataCount % partSize != 0) {
++groupCount;
}
for(int i = 0; i < groupCount; ++i) {
int start = i * partSize;
int end = (i + 1) * partSize - 1;
if (end > dataCount - 1) {
end = dataCount - 1;
}
List<T> bacths = new ArrayList();
for(int j = start; j <= end; ++j) {
bacths.add(list.get(j));
}
groups.add(bacths);
}
return groups;
} else {
return groups;
}
}
------使用方法
this.groupingList(new ArrayList<Long>(targetCallRespIds), 1000);