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获得商品详情的时候，总是报错。The method getItemsById(int) is undefined for the type ItemsDAO


<%@ page language="java" import="java.util.*"

contentType="text/html; charset=utf-8"%>

<%@ page import="entity.Items"%>

<%@ page import="dao.ItemsDAO"%>

<%

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>My JSP 'detail.jsp' starting page</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">

-->

<style type="text/css">

img {

border: 1px solid black;

height: 140px;

width: 180px;

}

</style>

</head>


<body>

<h1>商品详情</h1>

<hr>

<center>

<table width="750" height="60" cellpadding="0" cellspacing="0"

border="0">

<tr>

<td>

<%

ItemsDAO itemsDao = new ItemsDAO();

Items item = itemsDao.getItemsById(Integer.parseInt(request.getParameter("id")));

if(item != null)

{

%>

<table>

<tr>

<td rowspan="4"><img alt="运动鞋" src="images/<%=item.getPicture() %>"></td>

</tr>

<tr>

<td><big><%=item.getName() %></big></td>

</tr>

<tr>

<td>产地:<%=item.getCity() %></td>

</tr>

<tr>

<td>价格:<%=item.getPrice() %></td>

</tr>

</table>

<%

}

%>

</td>

</tr>

</table>

</center>

</body>

</html>


旧时光__

2017-10-25

源自：JAVA遇见HTML——JSP篇  8-7

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2 回答

旧时光__ 提问者
2017-10-25 
<%@ page language="java" import="java.util.*"
	contentType="text/html; charset=utf-8"%>
<%@ page import="entity.Items"%>
<%@ page import="dao.*"%>
<%
	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>My JSP 'index.jsp' starting page</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">
	-->
<style type="text/css">
img {
	width: 200px;
	height: 150px;
	border: 1px solid black;
}

div {
	float: left;
	margin: 10px;
}
</style>
</style>
</head>

<body>
	<h1>商品展示</h1>
	<hr>

	<center>
		<table width="750" height="60" cellpadding="0" cellspacing="0"
			border="0">
			<tr>
				<td>
					<!-- 商品循环开始 --> <%
 	ItemsDAO itemsDao = new ItemsDAO();
 	ArrayList<Items> list = itemsDao.getAllItems();
 	if (list != null && list.size() > 0) {
 		for (int i = 0; i < list.size(); i++) {
 			Items item = list.get(i);
 %>
<div>
					<table>
						<tr>
							<td colspan="2"><a href="detail.jsp?id=<%=item.getId()%>"><img alt=""
									src="images/<%=item.getPicture()%>"></a></td>
						</tr>
						<tr>
							<td><%=item.getName()%></td>
						</tr>
						<tr>
							<td>产地：<%=item.getCity()%></td>
							<td>价格:<%=item.getPrice()%>元
							</td>
						</tr>
					</table>
					</div>
					 <%
 	}
 	}
 %>

				</td>
			</tr>
		</table>
	</center>
</body>
</html>


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旧时光__ 提问者
2017-10-25 
<%@ page language="java" import="java.util.*"
	contentType="text/html; charset=utf-8"%>
<%@ page import="entity.Items"%>
<%@ page import="dao.ItemsDAO"%>
<%
	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>My JSP 'detail.jsp' starting page</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">
	-->
<style type="text/css">
img {
	border: 1px solid black;
	height: 140px;
	width: 180px;
}
</style>
</head>

<body>
	<h1>商品详情</h1>
	<hr>
	<center>
		<table width="750" height="60" cellpadding="0" cellspacing="0"
			border="0">
			<tr>
				<td>
					<%
						ItemsDAO itemsDao = new ItemsDAO();
						Items item = itemsDao.getItemsById(Integer.parseInt(request.getParameter("id")));
						if(item != null)
						{
					 %>
					<table>
						<tr>
							<td rowspan="4"><img alt="运动鞋" src="images/<%=item.getPicture() %>"></td>
						</tr>
						<tr>
							<td><big><%=item.getName() %></big></td>
						</tr>
						<tr>
							<td>产地:<%=item.getCity() %></td>
						</tr>
						<tr>
							<td>价格:<%=item.getPrice() %></td>
						</tr>
					</table>
					<%
						}
					 %>
				</td>
				
			</tr>
		</table>
	</center>
</body>
</html>


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