自定义分页工具类

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

/**

• @program: SpringBlade
• @description: PageUtil
• @author: wj
• @create: 2020-04-14 14:39
  /
  public class PageUtil {
  /

  • 开始分页

  • @param list

  • @param pageNum 页码

  • @param pageSize 每页多少条数据

  • @return
    */
    public static List startPage(List list, Integer pageNum,
    Integer pageSize) {
    if (list == null) {
    return null;
    }
    if (list.size() == 0) {
    return null;
    }
    // 记录总数
    Integer count = list.size();
    // 页数
    Integer pageCount = 0;
    if (count % pageSize == 0) {
    pageCount = count / pageSize;
    } else {
    pageCount = count / pageSize + 1;
    }
    // 开始索引
    int fromIndex = 0;
    // 结束索引
    int toIndex = 0;

    if (pageNum != pageCount) {
    fromIndex = (pageNum - 1) * pageSize;
    toIndex = fromIndex + pageSize;
    } else {
    fromIndex = (pageNum - 1) * pageSize;
    toIndex = count;
    }
    List pageList=new ArrayList();
    if(fromIndex>list.size()||toIndex>list.size()){
    }else{
    pageList = list.subList(fromIndex, toIndex);
    }
    return pageList;
    }
    }