PageInfoUtils 接收一个list，页码、每页条数

接收一个list，页码、每页条数，返回PageInfo对象

public class PageInfoUtils {
   /*
   	list：要执行分页的数组 
   	currentPage: 当前页数
   	pageSize：每页条数
   */
   public static <T> PageInfo<T> getPageInfo(List<T> list, int currentPage, int pageSize) {
       int total = list.size();
       if (total > pageSize) {
           int toIndex = pageSize * currentPage;
           if (toIndex > total) {
               toIndex = total;
           }
           int totalPage = total % pageSize == 0 ? (total/pageSize) : (total/pageSize)+1;
           if (totalPage < currentPage){
               list = new ArrayList<>();
           }else {
               list = list.subList(pageSize * (currentPage - 1), toIndex);
           }
       }else {
           list = currentPage == 1 ? list : new ArrayList<>();
       }

       PageInfo<T> pageInfo = new PageInfo<>(page);

       pageInfo.setTotal(total);	

       return pageInfo;
   }

}