关于分页的java帮助类

import java.util.ArrayList;
import java.util.List;

public class Page<T> {

    private int startIndex; //该页的起始行数
    private int pageNum; //当前页码
    private int totalPageNum; //总页数
    private int totalNum; //总记录数
    private int pageSize = 2; //每页显示的记录数量
    private List<T> list; //当前页的结果集
    
    
    public Page(int count,int pageNum) {
        this.setTotalNum(count);
        this.setPageNum(pageNum);
    }
    
    public int getStartIndex() {
        return startIndex;
    }
    public int getPageNum() {
        return pageNum;
    }
    /**
     * 设置当前的页码
     * @param pageNum
     */
    public void setPageNum(int pageNum) {
        if(pageNum <= 0) {
            pageNum = 1;
        } else if(pageNum > totalPageNum) {
            pageNum = totalPageNum;
        }
        this.pageNum = pageNum;
        this.startIndex = (this.pageNum - 1) * pageSize;
    }
    public int getTotalPageNum() {
        return totalPageNum;
    }

    public int getTotalNum() {
        return totalNum;
    }
    /**
     * 设置总记录数
     * @param totalNum
     */
    public void setTotalNum(int totalNum) {
        this.totalNum = totalNum;
        int temp = totalNum / pageSize;
        if(totalNum % pageSize != 0) {
            temp++;
        }
        this.totalPageNum = temp;
    }
    public List<T> getList() {
        return list;
    }
    public void setList(List<T> list) {
        this.list = list;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
    
    //count为页面中显示多少页，pageNum表示当前页码
    public List<Integer> getSlider(int count,int pageNum) {
        int halfSize = count / 2;
        int totalPage = getTotalPageNum();
        count -= 1;
        
        int startPageNo = Math.max(pageNum - halfSize, 1);
        int endPageNo = Math.min(startPageNo + count, totalPage);
 
        if (endPageNo - startPageNo != count) {
            startPageNo = Math.max(endPageNo - count, 1);
        }
 
        List<Integer> result = new ArrayList<Integer>();
        for (int i = startPageNo; i <= endPageNo; i++) {
            result.add(i);
        }
        return result;
    }

    
    
}