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一、创建分页类
package com.huakunwk.club.util; /** * @author [email protected] * @date 2018/6/6 14:53 */ public class Paging { private Integer totalNum;//总条数 private Integer totalPage;//总页数 private Integer pageSize;//每页条数 private Integer pageIndex;//当前页码 private Integer queryIndex;//当前页从第几条开始查 public static Paging pagination(Integer totalNum,Integer pageSize,Integer pageIndex){ Paging page = new Paging(); page.setTotalNum(totalNum); Integer totalPage = totalNum % pageSize == 0 ? totalNum / pageSize : totalNum / pageSize + 1; page.setTotalPage(totalPage); page.setPageIndex(pageIndex + 1); page.setPageSize(pageSize); page.setQueryIndex(pageSize * pageIndex); return page; } public Integer getTotalNum() { return totalNum; } public void setTotalNum(Integer totalNum) { this.totalNum = totalNum; } public Integer getTotalPage() { return totalPage; } public void setTotalPage(Integer totalPage) { this.totalPage = totalPage; } public Integer getPageSize() { return pageSize; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } public Integer getPageIndex() { return pageIndex; } public void setPageIndex(Integer pageIndex) { this.pageIndex = pageIndex; } public Integer getQueryIndex() { return queryIndex; } public void setQueryIndex(Integer queryIndex) { this.queryIndex = queryIndex; } }
二、手动对集合进行分页:
//手动对集合进行分页
List<ClubDTO> clubs = clubMapper.searchByCondition();//从数据库查询的集合数据
Paging paging = Paging.pagination(clubs.size(),pageSize,pageIndex); int fromIndex = paging.getQueryIndex(); int toIndex = 0; if (fromIndex + paging.getPageSize() >= clubs.size()){ toIndex = clubs.size(); }else { toIndex = fromIndex + paging.getPageSize(); } if (fromIndex > toIndex){ return Collections.EMPTY_LIST; } return clubs.subList(fromIndex,toIndex);