bulletionlist.java

是一个JSP与数据库应用系统

package until;

import java.sql.*;
import database.*;
import java.util.Vector;
import until.bulletion;

public class bulletionlist
{
	private int pagesize;
	private int pageno=1;
	private int Total = 0;
	private int TPages = 0;
	private int n = 1;       //此变量是设定分页时，
	private int pagers = 5; //此变量是设定分页时，页码的个数
	
	private Vector list;
	
	conn cn = new conn();
	
	public bulletionlist()
	{
		pagesize = 1;
	}
	
		public void setPagesize(int pagesize)
	{
		this.pagesize = pagesize;
	}
	
	
	public void setPageno(int pageno)
	{
		this.pageno = pageno; 
		
	}
	
	public int getTotal()
	{
		return Total;
	}
	public int getTPages()
	{
		return TPages;
	}
	
	public Vector getList()
	{
		return list;
	}
	
	
	public void Total()
	{
		try
		{
			    String strsql = "select Count(*) AS total from C_Bulletin";
				ResultSet rs = cn.executeQuery(strsql);
				if (rs.next())
				{
					 Total = rs.getInt(1);     
		             // 设置当前页数和总页数
		             TPages = (int)Math.ceil((double)Total/pagesize); 
				}
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	
	}
	
	public boolean pagelist()
	{
		boolean flag = false;
		try
		{
			String strsql1="select top "+pagesize+" * from C_Bulletin where id not in(select top "+pagesize*(pageno-1)+" id from C_Bulletin order by id desc) order by id desc";
            //String strsql1 = "select * from C_Bulletin";
			ResultSet rs = cn.executeQuery(strsql1);
			list = new Vector();
			while (rs.next())
			{
				bulletion btn = new bulletion();
				btn.setId(rs.getInt("id"));
			    btn.setTitle(rs.getString("title"));
				btn.setAuthor(rs.getString("author"));
				//btn.setContent(rs.getString("content"));
				btn.setDatetimes(rs.getString("datetimes"));
				
                list.addElement(btn);
			}
			cn.closestmt();
			cn.closeconn();
			flag = true;
			
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		return flag;
		
	}
	
}