1、写工具类
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
|
public class PageUtil {
public static List startPage(List list, Integer pageNum, Integer pageSize) { if(list == null){ return null; } if(list.size() == 0){ return null; } Integer count = list.size(); Integer pageCount = 0; if (count % pageSize == 0) { pageCount = count / pageSize; } else { pageCount = count / pageSize + 1; } int fromIndex = 0; int toIndex = 0; if(pageNum > pageCount){ pageNum = pageCount; } if (!pageNum.equals(pageCount)) { fromIndex = (pageNum - 1) * pageSize; toIndex = fromIndex + pageSize; } else { fromIndex = (pageNum - 1) * pageSize; toIndex = count; } List pageList = list.subList(fromIndex, toIndex); return pageList; } }
|
2、调用工具类( list 为 SQL查询的,,pageNum,pageSize 为分页参数)
1
| List pageList = PageUtil.startPage(list,pageNum,pageSize)
|