不显示JSP的表
我正在重用代码向jsp页面添加更多的表，但是在表设置中，有4个单元格拒绝/给出错误来显示。我如何使其工作，我在显示信息时做错了什么 类型 错误在上面不显示JSP的表,jsp,Jsp,我正在重用代码向jsp页面添加更多的表，但是在表设置中，有4个单元格拒绝/给出错误来显示。我如何使其工作，我在显示信息时做错了什么 类型 错误在上面 <style> #image{ text-align: center; } #acctForm{ text-align: center;
<style>
#image{
text-align: center;
}
#acctForm{
text-align: center;
}
#acctTable{
margin-left: 645px;
}
#submitTable{
margin-left: 755px;
}
table{
margin-left: auto;
margin-right: auto;
}
h4{
text-align: center;
}
</style>
</head>
<body>
<%
HttpSession ses1=request.getSession();
Student s1= (Student)ses1.getAttribute("student");
%>
<div id = "image">
<img src="StudentEarth.jpg" />
</div>
<h4>Here Is The Schedule</h4>
<table border="1" width="75%" cellspacing="8" cellpadding="2">
<thead>
<tr>
<th colspan="18">Student Info</th>
</tr>
</thead>
<tbody>
<tr>
<%--TABLE LABLES OF ACCOUNT INFORMATION --%>
<td colspan="2"></td>
<td colspan="2">First Name</td>
<td colspan="2">Last Name</td>
<td colspan="2">Street</td>
<td colspan="2">City</td>
<td colspan="2">State</td>
<td colspan="2">Zip</td>
<td colspan="2">Email</td>
<td colspan="2">Gpa</td>
</tr>
<tr>
<%--TABLE DISPLAY OF ACCOUNT INFORMATION --%>
<td colspan="2">Student: </td>
<td colspan="2"><%= s1.getFirstName()%></td>
<td colspan="2"><%= s1.getLastName()%></td>
<td colspan="2"><%= s1.getStreet()%></td>
<td colspan="2"><%= s1.getCity()%></td>
<td colspan="2"><%= s1.getState()%></td>
<td colspan="2"><%= s1.getZip()%></td>
<td colspan="2"><%= s1.getEMail()%></td>
<td colspan="2"><%= s1.getGpa()%></td>
</tr>
</tbody>
</table>
<table width="50%" cellspacing="8" cellpadding="2">
</table>
</body>
</html>
你会犯什么错误？生成的HTML看起来如何？服务器的错误日志中一定有更多信息。我复制了整个内容。如果学生引用s1为空，请确保属性Student存在于会话范围中。您在HTTP会话中分配的学生对象s1返回空值。确保在目的地正确设置。
<style>
#image{
text-align: center;
}
#acctForm{
text-align: center;
}
#acctTable{
margin-left: 645px;
}
#submitTable{
margin-left: 755px;
}
table{
margin-left: auto;
margin-right: auto;
}
h4{
text-align: center;
}
</style>
</head>
<body>
<%
HttpSession ses1=request.getSession();
Student s1= (Student)ses1.getAttribute("student");
%>
<div id = "image">
<img src="StudentEarth.jpg" />
</div>
<h4>Here Is The Schedule</h4>
<table border="1" width="75%" cellspacing="8" cellpadding="2">
<thead>
<tr>
<th colspan="18">Student Info</th>
</tr>
</thead>
<tbody>
<tr>
<%--TABLE LABLES OF ACCOUNT INFORMATION --%>
<td colspan="2"></td>
<td colspan="2">First Name</td>
<td colspan="2">Last Name</td>
<td colspan="2">Street</td>
<td colspan="2">City</td>
<td colspan="2">State</td>
<td colspan="2">Zip</td>
<td colspan="2">Email</td>
<td colspan="2">Gpa</td>
</tr>
<tr>
<%--TABLE DISPLAY OF ACCOUNT INFORMATION --%>
<td colspan="2">Student: </td>
<td colspan="2"><%= s1.getFirstName()%></td>
<td colspan="2"><%= s1.getLastName()%></td>
<td colspan="2"><%= s1.getStreet()%></td>
<td colspan="2"><%= s1.getCity()%></td>
<td colspan="2"><%= s1.getState()%></td>
<td colspan="2"><%= s1.getZip()%></td>
<td colspan="2"><%= s1.getEMail()%></td>
<td colspan="2"><%= s1.getGpa()%></td>
</tr>
</tbody>
</table>
<table width="50%" cellspacing="8" cellpadding="2">
</table>
</body>
</html>