一个用JSP实现的分页的类及调用方法

//PageCt.Java 分页的类

/*

*** @version ***********

*** Created on 2001年6月25日, 下午14:41

**************************************

*/

package vod;

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