pagination.java

NTsky新闻发布v1.0(提供JavaBean)

package ntsky.common;

import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.math.*;

public class  Pagination{
	private String strPage = null;//page参数变量
	private int curPages;//page参数内部的值
	private int m_rows; //设置每页显示的页数
	private int pages;//总页数
	
	//取得记录值
	public String strPage(HttpServletRequest request, String page){
	   try{
			strPage = request.getParameter(page);
       }
       catch(Exception e){
			System.out.println("delcolumn"+e.getMessage());	
	   }
       return strPage;
    }
	//页面数
	public int curPages(String strPage){
		try{
			if(strPage == null){
				curPages = 1;
			}
			else{
				curPages = Integer.parseInt(strPage);
				if(curPages < 1)
					curPages = 1;
			}
		}
		catch(Exception e){
			System.out.print("curPages");
		}
		return curPages;
	} 
	//传递每页显示的纪录
	public void setRows(int rows){
		m_rows=rows;
	}

	public int getPages(int rowcounts){
		int test;//变量
		test=rowcounts%m_rows;//取得余数
		if(test==0)
			pages = rowcounts/m_rows;
        else
			pages=rowcounts/m_rows+1;
		return pages;
		//页数
	}
	public ResultSet getPageSet(ResultSet rs,int curPages){
		if(curPages==1){
			return rs;
		}
		else{
			int i=1;
			try{
				while(rs.next()){
					i=i+1;
					if(i>((curPages-1)*m_rows))
						break;//退出
				}
				return rs;//从退出开始将结果集返回，也就是退出后的rs
			}
			catch(Exception e){
				System.out.print(e.getMessage());
			}
		}
		return rs;
	}
	/**
	//关闭指针
	public void	close(){
		if(rs != null){
			rs.close();
			rs = null;
		}
	}
	*/
}