pagect.java

uliu liuoulo p hp pi ij jp

package page;
import java.sql.*;
import java.util.*; 

public class PageCt
{
	private long l_start; //开始纪录
	private long l_end; //结束纪录
	private long l_curpage; //当前页数
	private long l_totalnum;//总记录数
	private int int_num=5; //每页10条
	private long l_totalpage; //总的页数
	
	
	public void Init(long currentpage,long totalnum)
	{
	l_curpage = currentpage;
	l_totalnum = totalnum;
	
	
	if (currentpage>=0)
	{
	if (currentpage>=(long)Math.ceil((double)l_totalnum/(double)int_num))
	l_curpage = (long)Math.floor((double)l_totalnum/(double)int_num);
	else
	l_curpage = currentpage;
	}
	else
	{
	l_curpage = 0;
	}
	l_start = l_curpage * int_num;
	l_end = l_start + int_num;
	if (l_end>l_totalnum)
	l_end = l_totalnum;
	l_totalpage = (long)Math.ceil((double)l_totalnum/(double)int_num);
	}
	public   long getCurpage()
	{
	return l_curpage;
	}
	public   long getPrepage()
	{
	if (l_curpage-1>=0)
	{
	return l_curpage-1;
	}
	else
	{
	return 0;
	}
	}
	public   long getNextpage()
	{
	if (l_curpage+1<=l_totalpage)
	{
	return l_curpage+1;
	}
	else
	{
	return l_totalpage;
	}
	}
	public   long getTotalnum()
	{
	return l_totalnum;
	}
	public   long getTotalpage()
	{
	return l_totalpage;
	}
	public   long getStart()
	{
	return l_start;
	}
	public   long getEnd()
	{
	return l_end;
	}
};