68 lines
1.6 KiB
Java
68 lines
1.6 KiB
Java
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package com.ruoyi.cms.util;
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import com.ruoyi.cms.domain.dto.PageDTO;
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import com.ruoyi.cms.domain.vo.PageVO;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Optional;
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/**
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* 分页工具类
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*
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* @author 马宝龙
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* @date 2026/6/26
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*/
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public class PageUtil {
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private PageUtil() {
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}
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/**
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* 返回空分页对象
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*
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* @param <T> 类型
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* @return 空分页
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*/
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public static <T> PageVO<T> empty() {
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return PageVO.<T>builder()
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.list(new ArrayList<>())
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.total(0L)
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.totalPage(0)
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.isFirst(true)
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.isLast(true)
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.build();
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}
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/**
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* 初始化分页
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*
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* @param list 内容列表
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* @param total 总数
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* @param pageNo 页码
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* @param pageSize 每页数量
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* @param <T> 类型
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* @return 分页
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*/
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public static <T> PageVO<T> init(List<T> list, Long total, Integer pageNo, Integer pageSize) {
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total = Optional.ofNullable(total).orElse(0L);
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pageNo = Optional.ofNullable(pageNo).orElse(PageDTO.PAGE_NO);
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pageSize = Optional.ofNullable(pageSize).orElse(PageDTO.PAGE_SIZE);
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int totalPage = (int) (total / pageSize);
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int morePage = (int) (total % pageSize);
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if (morePage > 0) {
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totalPage += 1;
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}
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return PageVO.<T>builder()
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.list(list)
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.total(total)
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.totalPage(totalPage)
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.isFirst(pageNo.equals(PageDTO.PAGE_NO))
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.isLast(pageNo.equals(totalPage))
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.build();
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}
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}
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