?? purchase.java
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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;
}
//設置頁面參數
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;
//根據當前頁數跳到第(頁數*5)條記錄
while(count<(page-1)*5&&it.hasNext())
{
it.next();
count++;
}
//依次輸出航班信息
count=0;
out.print("<table width=90% border=5 cellspacing=0>");
out.print("<tr align=center bgcolor=#3399FF><td width=20%>航班號</td><td width=20%>價格</td>"+"<td width=10%>預定</td></tr>");
//循環輸出航班日程安排到頁面中
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>");
//提供預定鏈接
out.print("<td><a href=/fly/Purchase.do?orderitem_id="+item.getId().getId()+">預定</a></td></tr>");
count++;
}
out.print("<tr><td colspan=6 align=center>");
out.print("<table width=50% border=0 cellspacing=0><tr>");
//判斷是否提供上一頁鏈接
if((page-1)>0)
{
out.print("<td width=50%><a href=/fly/pages/purchase.jsp?p_page="+(page-1)+">上一頁</a></td>");
}
else
out.print("<td width=50%>上一頁</td>");
//判斷是否提供下一頁鏈接
if((page-1)<(total/5))
{
out.print("<td width=50%><a href=/fly/pages/purchase.jsp?p_page="+(page+1)+">下一頁</a></td>");
}
else
out.print("<td width=50%>下一頁</td>");
out.print("</tr></table></td></tr>");
out.print("</table>");
}
}
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