给List分页

Posted 2020-12-11 aliceqin

PageInfo getPageInfo(int pageNum, int pageSize, List<Map> list) {
   Page page = new Page(pageNum, pageSize);
   int total = list.size();
   if (total > pageSize) {
      int toIndex = pageNum * pageSize;
      int startIndex = (pageNum - 1) * pageSize;
      if (toIndex > total) {
         toIndex = total;//结尾index
      }
      page.addAll(list.subList(startIndex, toIndex));
   }
   page.setPages((total - 1) / pageSize + 1);//总共有多少页
   page.setTotal(total);

　　PageInfo pageInfo = new PageInfo(page);
　　return pageInfo;
}