手动对list进行分页(返回PageInfo)

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我是靠谱客的博主文静音响，最近开发中收集的这篇文章主要介绍手动对list进行分页(返回PageInfo)，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

page工具类：

public class PageUtil {
    /*
    * Discreption: 手动对list分页
    * @param: [arrayList, pageNum, pageSize]
    * @return: com.github.pagehelper.PageInfo<T>
    */
    public static <T> PageInfo<T> list2PageInfo( Integer pageNum, Integer pageSize,List<T> list) {
        //实现list分页
        PageHelper.startPage(pageNum, pageSize);
        int pageStart = pageNum == 1 ? 0 : (pageNum - 1) * pageNum;
        int pageEnd = list.size() < pageSize * pageNum ? list.size() : pageSize * pageNum;
        List<T> pageResult = new LinkedList<T>();
        if (list.size() > pageStart) {
            pageResult = list.subList(pageStart, pageEnd);
        }
        PageInfo<T> pageInfo = new PageInfo<T>(pageResult);
        //获取PageInfo其他参数
        pageInfo.setTotal(list.size());
        int endRow = pageInfo.getEndRow() == 0 ? 0 : (pageNum - 1) * pageSize + pageInfo.getEndRow() + 1;
        pageInfo.setEndRow(endRow);
        boolean hasNextPage = list.size() <= pageSize * pageNum ? false : true;
        pageInfo.setHasNextPage(hasNextPage);
        boolean hasPreviousPage = pageNum == 1 ? false : true;
        pageInfo.setHasPreviousPage(hasPreviousPage);
        pageInfo.setIsFirstPage(!hasPreviousPage);
        boolean isLastPage = (list.size() > pageSize * (pageNum - 1) && list.size() <= pageSize * pageNum) ? true : false;
        pageInfo.setIsLastPage(isLastPage);
        int pages = list.size() % pageSize == 0 ? list.size() / pageSize : (list.size() / pageSize) + 1;
        pageInfo.setNavigateLastPage(pages);
        int[] navigatePageNums = new int[pages];
        for (int i = 1; i < pages; i++) {
            navigatePageNums[i - 1] = i;
        }
        pageInfo.setNavigatepageNums(navigatePageNums);
        int nextPage = pageNum < pages ? pageNum + 1 : 0;
        pageInfo.setNextPage(nextPage);
        pageInfo.setPageNum(pageNum);
        pageInfo.setPageSize(pageSize);
        pageInfo.setPages(pages);
        pageInfo.setPrePage(pageNum - 1);
        pageInfo.setSize(pageInfo.getList().size());
        int starRow = list.size() < pageSize * pageNum ? 1 + pageSize * (pageNum - 1) : 0;
        pageInfo.setStartRow(starRow);
        return pageInfo;
    }

}