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基于springboot开发的常用工具类总结。
There is a newer version: 3.0.2
package com.github.hetianyi.common.http;

import com.github.hetianyi.common.util.CollectionUtil;

import java.util.List;

/**
 * 分页工具类
 * @param 
 *
 * @author Jason He
 * @version 1.0.1
 * @since 1.0.1
 * @date 2020-01-18
 */
public class Page {
    /**
     * 分页页码
     */
    private int page;

    /**
     * 分页大小
     */
    private int pageSize;

    /**
     * 总页数
     */
    private int totalPages;

    /**
     * 当前页面记录数
     */
    private int size;

    /**
     * 总记录数
     */
    private int totalSize;

    /**
     * 上一页的最后一个记录id，用于分页加速获取记录
     */
    private int lastId;

    /**
     * 分页数据
     */
    private List data;

    /**
     * Empty constructor
     */
    public Page() {
    }

    /**
     * This constructor can used as output parameter.
     * @param page 分页
     * @param pageSize 分页大小
     * @param totalSize 总记录数
     * @param data 分页数据
     */
    public Page(int page, int pageSize, int totalSize, List data) {
        this.page = page;
        this.pageSize = pageSize;
        this.totalSize = totalSize;
        this.data = data;

        this.size = CollectionUtil.isNullOrEmpty(data) ? 0 : data.size();
        this.totalPages = (totalSize == 0 || totalSize <= pageSize) ? 1 :
                (totalSize % pageSize == 0 ? totalSize / pageSize : totalSize / pageSize + 1);
    }

    /**
     * This constructor can used as input parameter.
     * @param page 分页
     * @param pageSize 分页大小
     */
    public Page(int page, int pageSize) {
        this.page = page;
        this.pageSize = pageSize;
    }

    /**
     * This constructor can used as input parameter.
     * @param page 分页
     * @param pageSize 分页大小
     * @param lastId 上一页的最后一个记录id，用于分页加速获取记录
     */
    public Page(int page, int pageSize, int lastId) {
        this.page = page;
        this.pageSize = pageSize;
        this.lastId = lastId;
    }

    /*************** getters and setters ********************/

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public int getTotalPages() {
        return totalPages;
    }

    public void setTotalPages(int totalPages) {
        this.totalPages = totalPages;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    public int getTotalSize() {
        return totalSize;
    }

    public void setTotalSize(int totalSize) {
        this.totalSize = totalSize;
    }

    public int getLastId() {
        return lastId;
    }

    public void setLastId(int lastId) {
        this.lastId = lastId;
    }

    public List getData() {
        return data;
    }

    public void setData(List data) {
        this.data = data;
    }
}