📄 goumai.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<jsp:directive.page import="com.hygj.bean.*"/>
<jsp:directive.page import="com.hygj.service.*"/>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>商品购买页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
//获得参数
String id=request.getParameter("productId");
//判断参数是否存在
if(id==null){
response.sendRedirect("index.jsp");
}
else{
//执行数据库查询
ProductsBean product=new ProductsService().getById(Integer.parseInt(id));
//判断商品是否存在
if(product==null){
response.sendRedirect("index.jsp");
}
else{
//判断是否有数量的参数
String num="1";
if(request.getParameter("shuliang")!=null){
num=request.getParameter("shuliang");
}
//显示商品具体信息，同时提醒用户进行购买
%>
商品名称:<%=product.getProductName() %><br>
商品单价:<%=product.getUnitPrice() %><br>
<form action="CarServlet" method="post">
<input type="hidden" name="productId" value="<%=product.getProductId() %>">
请输入购买数量:<input type="text" name="shuliang" value="<%=num %>" size="3"><font color="red">(*请输入正整数)</font><br>
<br>
<input type="submit" value="购买"><input type="reset" value="取消">
</form>
<%
}
}
%>
</body>
</html>
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