purchase.java

基于Struts+Spring+Hibernate的航空票务系统

package com.yc.service;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspWriter;
import com.yc.dao.PurchaseDao;
import com.yc.model.Flights;
import com.yc.model.Orderitems;


public class Purchase {
	
	private PurchaseDao purchasedao;
	
	public PurchaseDao getPurchasedao()
	{
		return this.purchasedao;
	}
	
	public void setPurchasedao(PurchaseDao purchasedao)
	{
		this.purchasedao=purchasedao;
	}
	
	//设置页面参数
	public void list(HttpServletRequest request,JspWriter out) throws Exception
	{
		String tmp=(String)request.getParameter("p_page");
		
		if(tmp!=null)
		{
			listpage(request,out,Integer.parseInt(tmp));
		}
		else
		{
			listpage(request,out,1);
		}
	}
	
	public void listpage(HttpServletRequest request,JspWriter out,int page) throws Exception
	{
		List list=purchasedao.getAllFlights();
		
		if(list==null)
		{
			out.print("read fail");
			return ;
		}
		
		int total=list.size();
		int count=0;
		Iterator it=list.iterator();
		Orderitems item;
		Flights flight;
		
		//根据当前页数跳到第(页数*5)条记录
		while(count<(page-1)*5&&it.hasNext())
		{
			it.next();
			count++;
		}
		
		//依次输出航班信息
		count=0;
		out.print("<table width=90% border=5 cellspacing=0>");
		out.print("<tr align=center bgcolor=#3399FF><td width=20%>航班号</td><td width=20%>价格</td>"+"<td width=10%>预定</td></tr>");
		
		//循环输出航班日程安排到页面中
		while(it.hasNext()&&count<5)
		{
			item=(Orderitems)it.next();
			flight=(Flights)item.getId().getFlight();
			out.print("<tr><td>"+flight.getFlightNo()+"</td><td>"+flight.getStartPlace()+"</td><td>"+flight.getEndPlace()+"</td><td>"+item.getId().getDate()+"</td><td>"+flight.getPrice()+"</td>");
			//提供预定链接
			out.print("<td><a href=/fly/Purchase.do?orderitem_id="+item.getId().getId()+">预定</a></td></tr>");
			count++;
		}
		out.print("<tr><td colspan=6 align=center>");
		out.print("<table width=50% border=0 cellspacing=0><tr>");
		
		//判断是否提供上一页链接
		if((page-1)>0)
		{
			out.print("<td width=50%><a href=/fly/pages/purchase.jsp?p_page="+(page-1)+">上一页</a></td>");
		}
		else
			out.print("<td width=50%>上一页</td>");
		
		//判断是否提供下一页链接
		if((page-1)<(total/5))
		{
			out.print("<td width=50%><a href=/fly/pages/purchase.jsp?p_page="+(page+1)+">下一页</a></td>");
		}
		else
			out.print("<td width=50%>下一页</td>");
		out.print("</tr></table></td></tr>");
		out.print("</table>");
	}
}