Java实现手动对list集合进行分页

一、创建分页类

package com.huakunwk.club.util;

/**

• @author Lix@jchvip.com

• @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 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);

作者：一个很酷的人
来源：CSDN
原文：https://blog.csdn.net/hi_boy_/article/details/80612310
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