常用分页函数辅助类

public class ReturnDataWrapper {
    private List rows = new ArrayList();
    private int total;
    private int pageSize;
    private int pageNo;

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public List getRows() {
        return rows;
    }
//假分页
    public void setFakeRows(List rows, int pageNo,
            int pageSize) {
        this.total = rows.size();
        this.pageSize = pageSize;
        this.pageNo = pageNo;
        this.rows = rows;
        pageUtil();
    }
//真分页
    public void setDbRows(List rows, int pageSize, int pageNo, int total) {
        this.total = total;
        this.pageSize = pageSize;
        this.pageNo = pageNo;
        this.rows = rows;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public int getPageNo() {
        return pageNo;
    }

    public void setPageNo(int pageNo) {
        this.pageNo = pageNo;
    }


    protected void pageUtil() {
        ComparatorPoolElement comparatorPoolElement = new ComparatorPoolElement();
        Collections.sort(rows, comparatorPoolElement);
        pageNo = pageNo < 1 ? 1 : pageNo;
        if (rows.size() % pageSize == 0) {
            pageNo = pageNo > (rows.size() / pageSize) ? (rows.size() / pageSize)
                    : pageNo;
        } else {
            pageNo = pageNo > (rows.size() / pageSize + 1) ? (rows.size()
                    / pageSize + 1) : pageNo;
        }
        int start = (pageNo - 1) * pageSize;
        int end = pageNo * pageSize;

        start = start < 1 ? 0 : start;
        end = end > rows.size() ? rows.size() : end;
        this.rows = rows.subList(start, end);

    }

    public static List<Integer> subIntegerList(List<Integer> origined, int pageSize,
            int pageNo) {
        Collections.sort(origined);
        pageNo = pageNo < 1 ? 1 : pageNo;
        if (origined.size() % pageSize == 0) {
            pageNo = pageNo > (origined.size() / pageSize) ? (origined.size() / pageSize)
                    : pageNo;
        } else {
            pageNo = pageNo > (origined.size() / pageSize + 1) ? (origined
                    .size() / pageSize + 1) : pageNo;
        }
        int start = (pageNo - 1) * pageSize;
        int end = pageNo * pageSize;

        start = start < 1 ? 0 : start;
        end = end > origined.size() ? origined.size() : end;
        return origined.subList(start, end);
    }

    class ComparatorPoolElement implements Comparator<PoolElement> {
        @Override
        public int compare(PoolElement o1, PoolElement o2) {
            return o1.getId() - o2.getId();
        }
    }

    
      public static void main(String[] args) {
          List<Integer> list = new ArrayList<Integer>();
          for (int i = 0; i < 100; i++) {
            list.add(i);
          }
        System.out.println(ReturnDataWrapper.subIntegerList(list,10,11));
      }    
}