獲得商品詳情的時候，總是報錯。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>商品詳情</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="運動鞋" src="images/<%=item.getPicture() %>"></td>
</tr>
<tr>
<td><big><%=item.getName() %></big></td>
</tr>
<tr>
<td>產地:<%=item.getCity() %></td>
</tr>
<tr>
<td>價格:<%=item.getPrice() %></td>
</tr>
</table>
<%
}
%>
</td>
</tr>
</table>
</center>
</body>
</html>
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> <!--?商品循環開始?-->?<% ? 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>產地：<%=item.getCity()%></td> <td>價格:<%=item.getPrice()%>元 </td> </tr> </table> </div> ?<% ? } ? } ?%> </td> </tr> </table> </center> </body> </html>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>商品詳情</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="運動鞋"?src="images/<%=item.getPicture()?%>"></td> </tr> <tr> <td><big><%=item.getName()?%></big></td> </tr> <tr> <td>產地:<%=item.getCity()?%></td> </tr> <tr> <td>價格:<%=item.getPrice()?%></td> </tr> </table> <% } ?%> </td> </tr> </table> </center> </body> </html>