page.java

一个网上购书系统

/*
 * Created on 2006-5-15
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package com.bookstore.db;


/** 
 * Title:<br> 
 * Description: 
 * Copyright:    Copyright (c)<br> 
 * @author zhanghong
 * @version 1.0 
 */ 
public  class Page implements java.io.Serializable { 
    
	/**
	 * 
	 */
	private static final long serialVersionUID = 2770164670991175678L;
	public int recordCounterPerPage = 0; //每页的记录数
	public int recordTotalCount = 0;//总记录数
	public int currentPageno; //当前页号
	public int totalPageCount; //总页数
	public int loopCounter = 0;//循环时用
	//public int startRecordNo = 1;//开始时的记录号

    public Page(int recordCounterPerPage,
    		int recordTotalCount,
    		int currentPageno,
    		//int totalPageCount,
    		int loopCounter){ 
    	init(recordCounterPerPage,recordTotalCount,currentPageno,
    			loopCounter);
    } 

    /** 
     * @param recordCounterPerPage 
     * @param recordTotalCount 
     * @param currentPageno 
     * @param totalPageCount 
     * @param loopCounter 
     * @param startRecordNo
     */ 
    protected void init(int recordCounterPerPage,
				    		int recordTotalCount,
				    		int currentPageno,
				    		//int totalPageCount,
				    		int loopCounter){ 

    	this.recordCounterPerPage = recordCounterPerPage;
    	this.recordTotalCount = recordTotalCount;
    	this.currentPageno = currentPageno;
    	//this.totalPageCount = totalPageCount;
    	this.loopCounter = loopCounter;
    	//this.startRecordNo = startRecordNo;

        if(recordTotalCount%recordCounterPerPage==0)
        {
        	totalPageCount = recordTotalCount/recordCounterPerPage;
        }
        else
        {
        	totalPageCount = recordTotalCount/recordCounterPerPage + 1;
        }
        if(currentPageno<=1)
        {
        	currentPageno = 1;
        }
        if(currentPageno >= totalPageCount)
        {
        	currentPageno = totalPageCount;
        }
    } 
    
    /** 
     * 取当前页码 
     * @return 当前页码 
     */ 
    public int getCurrentPageNo(){ 
        return  this.currentPageno; 
    } 
    //取得总页数
    public int getTotalPageCount(){ 
        return  this.totalPageCount; 
    } 
    
    /** 
     * @param jspName JSP文件的名称  
     * @return String
     */ 
    public String getHTML(String jspName){ 
    	StringBuffer html= new StringBuffer(256);
    	html.append("<br><center>");
    	html.append("<a href='"+jspName+"?currentShowPage=1'>首页</a>&nbsp;&nbsp;&nbsp;&nbsp;");
    	if(currentPageno == 1)
    	{
    		html.append("<a href='"+jspName+"?currentShowPage="+(currentPageno+1)+"'>下一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	if(currentPageno != 1 && currentPageno != totalPageCount && currentPageno != 0)
    	{
    		html.append("<a href='"+jspName+"?currentShowPage="+(currentPageno-1)+"'>上一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    		html.append("<a href='"+jspName+"?currentShowPage="+(currentPageno+1)+"'>下一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	if(currentPageno == totalPageCount && currentPageno != 1)
    	{
    		html.append("<a href='"+jspName+"?currentShowPage="+(currentPageno-1)+"'>上一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	html.append("<a href='"+jspName+"?currentShowPage="+totalPageCount+"'>最后一页</a>");
    	html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	for(loopCounter=1;loopCounter<=totalPageCount;loopCounter++)
    	{
    		if(loopCounter!=currentPageno)
    		{
    			html.append("<a href='"+jspName+"?currentShowPage="+loopCounter+"'>"+loopCounter+"</a>");
    			html.append("&nbsp;&nbsp;");
    		}
    		else
    		{
    			html.append(loopCounter+"&nbsp;&nbsp;");
    		}
    	}
    	return html.toString();
    } 
    
    /** 
     * @param jspName JSP文件的名称  
     * @return String
     */ 
    public String getIframListHTML(String jspName){ 
    	StringBuffer html= new StringBuffer(256);
    	html.append("<br><center>");
    	html.append("<a href='"+jspName+"&currentShowPage=1'>首页</a>&nbsp;&nbsp;&nbsp;&nbsp;");
    	if(currentPageno == 1)
    	{
    		html.append("<a href='"+jspName+"&currentShowPage="+(currentPageno+1)+"'>下一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	if(currentPageno != 1 && currentPageno != totalPageCount && currentPageno != 0)
    	{
    		html.append("<a href='"+jspName+"&currentShowPage="+(currentPageno-1)+"'>上一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    		html.append("<a href='"+jspName+"&currentShowPage="+(currentPageno+1)+"'>下一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	if(currentPageno == totalPageCount && currentPageno != 1)
    	{
    		html.append("<a href='"+jspName+"&currentShowPage="+(currentPageno-1)+"'>上一页</a>");
    		html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	}
    	html.append("<a href='"+jspName+"&currentShowPage="+totalPageCount+"'>最后一页</a>");
    	html.append("&nbsp;&nbsp;&nbsp;&nbsp;");
    	for(loopCounter=1;loopCounter<=totalPageCount;loopCounter++)
    	{
    		if(loopCounter!=currentPageno)
    		{
    			html.append("<a href='"+jspName+"&currentShowPage="+loopCounter+"'>"+loopCounter+"</a>");
    			html.append("&nbsp;&nbsp;");
    		}
    		else
    		{
    			html.append(loopCounter+"&nbsp;&nbsp;");
    		}
    	}
    	return html.toString();
    } 
}