按list大小进行分组

package cn.tk.netcore.rest;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Listgrop{

    //方法二：效率比较高 备注：pageSize集合显示的分组个数，soruceDatas为集合原数据
    private static List<List<String>> groupByList(List<String> sourceDatas,int pageSize) {
        // 分组集合
        List<List<String>> groupLists = new ArrayList<> ();
        // 分组数据
        List<String> tempDatas = new ArrayList<> ();
        if (sourceDatas != null && pageSize > 0) {

            for (int i = 0;i < sourceDatas.size ();i++) {
                if (i % pageSize == 0) {
                    if (!tempDatas.isEmpty ()) {
                        groupLists.add (tempDatas);
                    }
                    tempDatas = new ArrayList<> ();
                    tempDatas.add (sourceDatas.get (i));

                } else {
                    tempDatas.add (sourceDatas.get (i));
                }
            }
        }
        if (!tempDatas.isEmpty ()) {
            groupLists.add (tempDatas);
        }
        return groupLists;
    }

    public static void main(String[] args) {
        // 分组记录数
        int pageSize = 5;
        // 原始数据
        List<String> list = new ArrayList<String> (Arrays.asList ("a","b","c",
                "d","e","f","g","h"));
        System.out.println (groupByList (list,pageSize));
    }

}