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分页插件代码


package com.utils;

import java.io.Serializable;
import java.util.List;
import java.util.Map;

import com.baomidou.mybatisplus.plugins.Page;

/**
 * 分页工具类
 */
public class PageUtils implements Serializable {
  private static final long serialVersionUID = 1L;
  //总记录数
  private long total;
  //每页记录数
  private int pageSize;
  //总页数
  private long totalPage;
  //当前页数
  private int currPage;
  //列表数据
  private List<?> list;
  
  /**
   * 分页
   * @param list        列表数据
   * @param totalCount  总记录数
   * @param pageSize    每页记录数
   * @param currPage    当前页数
   */
  public PageUtils(List<?> list, int totalCount, int pageSize, int currPage) {
    this.list = list;
    this.total = totalCount;
    this.pageSize = pageSize;
    this.currPage = currPage;
    this.totalPage = (int)Math.ceil((double)totalCount/pageSize);
  }

  /**
   * 分页
   */
  public PageUtils(Page<?> page) {
    this.list = page.getRecords();
    this.total = page.getTotal();
    this.pageSize = page.getSize();
    this.currPage = page.getCurrent();
    this.totalPage = page.getPages();
  }
  
  /*
   * 空数据的分页
   */
  public PageUtils(Map<String, Object> params) {
     Page page =new Query(params).getPage();
    new PageUtils(page);
  }