Java 对list集合分页截取分页，返回当前页

 代码中注释了很清楚，也很直观，需要三个参数，分别是要截取的list集合，当前页，每页条数，具体代码如下：

package com.rocky.fintech.boss.util;

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

/**
 * @author 9043
 * @description：对集合分页
 * @date 2019/12/14 10:17
 */
public class ListPagingUtil {
    /**
     *
     * @param list
     * @param pageNum
     * @param pageSize
     * @param 
     * @return 返回当前页数据
     */
    public static  List getListPaging(List list, int pageNum, int pageSize) {
        if(list == null || list.size() <= 0){
            return new ArrayList<>(0);
        }
        //开始下标
        int startIndex = (pageNum - 1) * pageSize;
        //结束下标 subList()方法不包含结束下标的元素
        int endIndex = pageNum * pageSize;
        //list总条数
        int total = list.size();
        //总页数
        int pageCount = 0;
        //通过取余决定是否给总页数加1
        int num = total % pageSize;
        if (num == 0) {
            pageCount = total / pageSize;
        } else {
            pageCount = total / pageSize + 1;
        }
        //如果当前页是最后一页的话 要包含集合的最后一条数据，因为sublist方法本身结束的下标是不包含当前元素的
        if (pageNum == pageCount) {
            endIndex = total;
        }
        return list.subList(startIndex, endIndex);
    }
}

以下代码仅供参考，使用了分页插件：

    @Override
    public PageDTO getPartnerScheduleList(int pageNum, int pageSize
            , PartnerScheduleTrackQuery partnerScheduleTrackQuery) {
        List partnerScheduleBOS = new ArrayList<>();
        List partners = this.partnerScheduleTrackMapper.findPartnerScheduleTrackListByPartnerScheduleTrackQuery(partnerScheduleTrackQuery);
        partners.forEach(partnerBO -> {
            PartnerScheduleBO partnerScheduleBO = new PartnerScheduleBO();
            partnerScheduleBO.setId(partnerBO.getId());
            partnerScheduleBO.setPartnerNo(partnerBO.getPartnerNo());
            partnerScheduleBO.setPartnerName(partnerBO.getPartnerName());
            partnerScheduleBO.setStage(partnerBO.getStage());
            partnerScheduleBO.setAppScheduleStage(partnerBO.getAppScheduleStage());
            partnerScheduleBO.setTrackerAdminId(partnerBO.getTrackerAdminId());
            partnerScheduleBO.setAppScheduleAddTime(partnerBO.getAppScheduleAddTime());
            partnerScheduleBO.setRemark(partnerBO.getRemark());
            List scheduleTrackBOS = partnerBO.getScheduleTrackBOS();
            if (!CollectionUtils.isEmpty(scheduleTrackBOS)) {
                partnerScheduleBO.setPlanTimeStart(scheduleTrackBOS.get(0).getPlanTimeStart());
                partnerScheduleBO.setPlanTimeEnd(scheduleTrackBOS.get(scheduleTrackBOS.size() - 1).getPlanTimeEnd());
            }
            partnerScheduleBOS.add(partnerScheduleBO);
        });
        PageDTO pageDTO = new PageDTO<>();
        pageDTO.setList(ListPagingUtil.getListPaging(partnerScheduleBOS, pageNum, pageSize));
        pageDTO.setPageNum(pageNum);
        pageDTO.setPageSize(pageSize);
        pageDTO.setTotal(Long.valueOf(partners.size()));
        return pageDTO;
    }

如有疑问请留言。