package com.oying.utils;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import java.util.*;
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/**
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* 分页工具
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* @author Z
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* @date 2018-12-10
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*/
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public class PageUtil extends cn.hutool.core.util.PageUtil {
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/**
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* List 分页
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*/
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public static <T> List<T> paging(int page, int size , List<T> list) {
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int fromIndex = page * size;
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int toIndex = page * size + size;
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if(fromIndex > list.size()){
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return Collections.emptyList();
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} else if(toIndex >= list.size()) {
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return list.subList(fromIndex,list.size());
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} else {
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return list.subList(fromIndex,toIndex);
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}
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}
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/**
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* Page 数据处理
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*/
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public static <T> PageResult<T> toPage(IPage<T> page) {
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return new PageResult<>(page.getRecords(), page.getTotal());
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}
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/**
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* 自定义分页
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*/
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public static <T> PageResult<T> toPage(List<T> list) {
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return new PageResult<>(list, list.size());
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}
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/**
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* 返回空数据
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*/
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public static <T> PageResult<T> noData () {
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return new PageResult<>(null, 0);
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}
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/**
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* 自定义分页
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*/
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public static <T> PageResult<T> toPage(List<T> list, long totalElements) {
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return new PageResult<>(list, totalElements);
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}
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}
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