articlesearch.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 admin.article;

public class articlesearch
{
	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
	
	conn cn = new conn();
	
	private String keyword;
	
	private Vector atlist;
	
	public articlesearch()
	{
		pagesize = 1;
		keyword = "";
	}
	
	public void setKeyword(String keyword)
	{
		try
		{
			this.keyword = new String(keyword.getBytes("ISO8859_1"),"gb2312");
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
	}
	
	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 atlist;
	}
	
	public void Total()
	{
		try
		{
			    String strsql = "";
			    
			    if((keyword=="")||(keyword==null)||(keyword.equals("")))
			    {
			    	strsql = "select Count(*) AS total from C_Article";
			    }
			    else
			    {
			        strsql = "select Count(*) AS total from C_Article where title like '%"+keyword+"%'";
                }			    
				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 strsql = "";
			if((keyword=="")||(keyword==null)||(keyword.equals("")))
			{
				strsql = "select top "+pagesize+" * from C_Article where id not in(select top "+pagesize*(pageno-1)+" id from C_Article order by id desc) order by id desc";
			}
			else
			{
				strsql = "select top "+pagesize+" * from C_Article where id not in(select top "+pagesize*(pageno-1)+" id from C_Article where title like '%"+keyword+"%' order by id desc) and title like '%"+keyword+"%' order by id desc";
            }
			ResultSet rs = cn.executeQuery(strsql);
			atlist = new Vector();
			while (rs.next())
			{
				article at = new article();
				at.setId(rs.getInt("id"));
				at.setBigClass(rs.getString("BigClass"));
				at.setSmallClass(rs.getString("SmallClass"));
				at.setTitle(rs.getString("title"));
				at.setAuthor(rs.getString("author"));
				at.setPropert_r(rs.getString("propert_r"));
				at.setPropert_t(rs.getString("propert_t"));
				at.setDatetimes(rs.getString("datetimes"));
				at.setIsno(rs.getString("isno"));
				at.setHit(rs.getInt("hit"));
				
                atlist.addElement(at);
                flag = true;
			}
			cn.closestmt();
			cn.closeconn();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		return flag;
	}
}