shoppingcar.java

基于Struts+Spring+Hibernate的航空票务系统

package com.yc.service;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspWriter;

import com.yc.dao.ShoppingCarDao;
import com.yc.model.Flights;
import com.yc.model.Orderitems;
import com.yc.model.Orders;
import com.yc.model.Users;

public class ShoppingCar {
	
	private ShoppingCarDao cardao;
	
	public ShoppingCarDao getCardao()
	{
		return this.cardao;
	}
	
	public void setCardao(ShoppingCarDao cardao)
	{
		this.cardao=cardao;
	}
	
	public void list(HttpServletRequest request,JspWriter out) throws Exception
	{
		String tmp=(String)request.getParameter("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 IOException
	{
		Long id=(Long)request.getSession().getAttribute("curr_id");
		List list=cardao.getAllOrders(id);
		if(list==null)
		{
			out.print("read order fail");
			return ;
		}
		
		int total=list.size();
		int count=0;
		Iterator it=list.iterator();
		Orders order;
		Users user;
		Orderitems item;
		Flights flight;
		
		while(count<(page-1)*5&&it.hasNext())
		{
			it.next();
			count++;
		}
		
		//输出表格头
		count=0;
		out.print("<table width=90% border=5 cellspacing=0>");
		out.print("<tr align=center bgcolor=#3399FF><td width=20%>用户名</td><td width=20%>航班</td>"
				+"<td width=20%>票价</td>"+"<td width=30%>日期</td><td width=10%>退票</td></tr>");
		
		while(it.hasNext()&&count<5)
		{
			order=(Orders)it.next();
			user=(Users)order.getuser();
			item=(Orderitems)order.getOrderitems();
			flight=(Flights)order.getOrderitems().getId().getFlight();
			out.print("<tr><td>"+user.getAccountNo()+"</td><td>"+flight.getFlightNo()+"</td><td>"+flight.getPrice()+"</td><td>"+item.getId().getDate()+"</td>");
			//提供退票链接，该链接带有一个参数order_id,表示要退票的ID
			out.print("<td><a href=/fly/Retrieve.do?order_id="+order.getId()+">退票</a></td></tr>");
			count++;
		}
		
		//根据当前页数判断是否提供上一页和下一页链接
		out.print("<tr><td colspan=5 align=center>");
		out.print("<table width=50% border=0 cellspacing=0><tr>");
		if((page-1)>0)
		{
			out.print("<td width=50%><a href=/fly/pages/shoppingcar.jsp?page="+(page-1)+">上一页</a></td>");
		}
		else
			out.print("<td width=50%>上一页</td>");
		if((page-1)<(total/5))
			out.print("td width=50%><a href=/fly/pages/shoppingcar.jsp?>page="+(page+1)+">下一页</a></td>");
		else
			out.print("</tr></table></td></tr>");
		out.print("</table>");
	}
}