📄 trade.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="../error/error.jsp" %>
<%@ page import="java.util.*"%>
<%@ page import="BookShop.*"%>
<script language="javascript" src="../css/bs.js"></script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>购物车</title>
<link rel="stylesheet" type="text/css" href="../css/bs.css"/>
<jsp:useBean id="trade" class="BookShop.MyDb" scope="page">
</jsp:useBean>
<jsp:useBean id="newbook" class="BookShop.Ware" scope="page" />
<jsp:setProperty name="newbook" property="id" param="id"/>
</head>
<%! String id,del,idbook,bookname,action,sqls,sqls1,bookadd;
int d,i,j,k,quantity,sale,stock,quantityadd;
float countprice,price,count;
%>
<body>
<p> </p>
<table width="658" border="1" align="center" cellpadding="-1" cellspacing="0" bordercolor="#FFFFFF" bordercolorlight="#0066ff" bordercolordark="#FFFFFF" >
<caption>
<div class="two">购物车</div>
<p></p>
</caption>
<tr align="center">
<td width="240" height="22">书名</td>
<td width="111" height="22">单价</td>
<td width="92" height="22">数量</td>
<td width="112" height="22">金额</td>
<td width="91" height="22">退书</td>
</tr>
<%
Vector buylist=(Vector)session.getAttribute("shoppingcart");
try{
action=(String)request.getParameter("action");
}catch(Exception e){
action="";
}
if(action.equals("del")){
try{
del=(String)request.getParameter("delj");
d=(new Integer(del)).intValue();
buylist.removeElementAt(d);
}catch(Exception e){
}
}else if(action.equals("add")){
boolean match=false;
//新客户创建新列表
if(buylist==null){
buylist=new Vector();
sqls="SELECT price,bookname,stock,sale FROM books WHERE idbook='"+newbook.getId()+"'";
Statement stmt=trade.getstmtread();
ResultSet rs=stmt.executeQuery(sqls);
//控制图书是否卖完
boolean match3=false;
if(rs.next()){
stock=rs.getInt("stock");
sale=rs.getInt("sale");
if(0>=(stock-sale)){
session.setAttribute("error","图书已经购完");
response.sendRedirect("../error/errorpage.jsp");
}else{
match3=true;
}
}
rs.beforeFirst();
if(rs.next()&&match3==true){
newbook.setQuantity(1);
newbook.setPrice(Float.parseFloat(rs.getString(1)));
newbook.setName(rs.getString(2));
newbook.setCountprice(newbook.getPrice()*newbook.getQuantity());
buylist.addElement(newbook);
}
trade.close();
//更改图书列表
}else{
for(i=0;i<buylist.size();i++){
Ware book=(Ware)buylist.elementAt(i);
//重复书籍计数
if(book.getId().equals(newbook.getId())){
sqls1="SELECT price,bookname,stock,sale FROM books WHERE idbook='"+newbook.getId()+"'";
Statement stmt1=trade.getstmtread();
ResultSet rs1=stmt1.executeQuery(sqls1);
//控制图书是否卖完
if(rs1.next()){
stock=rs1.getInt("stock");
sale=rs1.getInt("sale");
if(0>=(stock-sale-book.getQuantity())){
session.setAttribute("error","图书数量不足");
response.sendRedirect("../error/errorpage.jsp");
}else{
newbook.setQuantity(book.getQuantity()+1);
buylist.setElementAt(newbook,i);
}
match=true;
trade.close();
}
}
//新建立图书类型
sqls="SELECT price,bookname,stock,sale FROM books WHERE idbook='"+newbook.getId()+"'";
Statement stmt=trade.getstmtread();
ResultSet rs=stmt.executeQuery(sqls);
//控制图书是否卖完
if(rs.next()){
stock=rs.getInt("stock");
sale=rs.getInt("sale");
if(0>=(stock-sale)){
session.setAttribute("error","图书数量不足");
response.sendRedirect("../error/errorpage.jsp");
}
}
rs.beforeFirst();
if(rs.next()){
newbook.setPrice(Float.parseFloat(rs.getString(1)));
newbook.setName(rs.getString(2));
newbook.setCountprice(newbook.getPrice()*newbook.getQuantity());
}
trade.close();
}//for
if(!match){
sqls="SELECT price,bookname,stock,sale FROM books WHERE idbook='"+newbook.getId()+"'";
Statement stmt=trade.getstmtread();
ResultSet rs=stmt.executeQuery(sqls);
//控制图书是否卖完
boolean match2=false;
if(rs.next()){
stock=rs.getInt("stock");
sale=rs.getInt("sale");
if(0>=(stock-sale)){
session.setAttribute("error","图书已经购完");
response.sendRedirect("../error/errorpage.jsp");
}else{
match2=true;
}
}
rs.beforeFirst();
if(rs.next()&&match2==true){
newbook.setPrice(Float.parseFloat(rs.getString(1)));
newbook.setName(rs.getString(2));
newbook.setQuantity(1);
newbook.setCountprice(newbook.getPrice()*newbook.getQuantity());
buylist.addElement(newbook);
}
trade.close();
}//!match
}//buylist!=null
}else if(action.equals("update")){
boolean match1=false;
for(k=0;k<buylist.size();k++){
try{
bookadd=(String)request.getParameter("book"+k);
}catch(Exception e){
bookadd="";
}
try{
quantityadd=Integer.parseInt((String)request.getParameter("quantity"+k));
}catch(Exception e){
quantityadd=0;
}
Ware book=(Ware)buylist.elementAt(k);
if(bookadd!=""&&quantityadd!=0){
//控制图书是否卖完
sqls="SELECT price,bookname,stock,sale FROM books WHERE idbook='"+bookadd+"'";
Statement stmt=trade.getstmtread();
ResultSet rs=stmt.executeQuery(sqls);
//控制图书是否卖完
if(rs.next()){
stock=rs.getInt("stock");
sale=rs.getInt("sale");
if(0>(stock-sale-quantityadd)){
session.setAttribute("error","图书数量不足");
response.sendRedirect("../error/errorpage.jsp");
}else{
match1=true;
}
}
trade.close();
//修改数量
if(book.getId().equals(bookadd)&&match1==true){
book.setQuantity(quantityadd);
book.setCountprice(book.getPrice()*book.getQuantity());
}
}
}//for
}//endif
session.setAttribute("shoppingcart",buylist);
//显示功能
if(buylist!=null&&buylist.size()>0){
for(j=0;j<buylist.size();j++){
Ware book=(Ware)buylist.elementAt(j);
bookname=book.getName();
price=book.getPrice();
quantity=book.getQuantity();
countprice=book.getCountprice();
count=count+countprice;
%>
<tr align="center">
<td height="22"><%=bookname%> </td>
<td height="22"><%=price%> </td>
<form name="<%="form"+j%>" method="post" action="trade.jsp">
<td height="22">
<input type="hidden" name="action" value="update">
<input type="hidden" name="<%="book"+j%>" value="<%=book.getId()%>">
<input name="<%="quantity"+j%>" type="text" size="5" value="<%=quantity%>" onBlur="javascript:submit(<%="form"+j%>)">
</td>
</form>
<td height="22"><%=countprice%> </td>
<form action="trade.jsp" method="post" name="form">
<td height="22">
<input type="hidden" name="action" value="del">
<input type="hidden" name="delj" value="<%=j%>">
<input type="image" src="../image/move.gif"></td>
</form>
</tr>
<%
}//for
%>
<tr align="center">
<td height="22" colspan="5"><span class="red12">总金额:<%=count%></span></td>
</tr>
<tr align="center">
<td height="22" colspan="2">
<a href="account.jsp">收银台结账</a></td>
<td height="22" colspan="3"><a href="#">修改数量</a></td>
</tr>
<%
count=0;
}else{
%>
<tr align="center">
<td height="40" colspan="5" class="red12">你的购物车是空的！！！</td>
</tr>
<%
}
%>
<tr align="center">
<td height="22" colspan="5"> <a href="../customer/hotdeal.jsp" >继续购物</a></td>
</tr>
</table>
</body>
</html>
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