Struts的问题（刚刚接触Struts，也许问题很菜，务请大家指教）

这是我的页面内容。一个很简单的页面。
<%@ taglib uri="/bean" prefix="bean"%>
<%@ taglib uri="/html" prefix="html"%>
<%@ taglib uri="/logic" prefix="logic"%>
<%@ taglib uri="/app" prefix="app"%><html>
<head>
<title></title>
</head>

<body>
<html:errors/>
<app:deptList/>
<app:skillsList/>

<html:form action="validateUser.do">
<table>
<tr>
<td align="right">name:</td>
<td><html:text property="name"/></td>
</tr>

<tr>
<td align="right">sex:</td>
<td><html:text property="sex"/></td>
</tr>

<tr>
<td align="right">department:</td>
<td>
<html:select property="dept">
<html:options name="deptList"/>
</html:select>
</td>
</tr>
<tr>
<td>
skills:
</td>
<td>
<logic:iterate id="currentSkill" name="skillsList">
<html:multibox property="skills">
<%=currentSkill%>
</html:multibox>
<%=currentSkill%>
<br>
</logic:iterate>
</td>
</tr>
<tr>
<td colspan="2" align="center">
<html:submit value="Validate"/> &nbsp;&nbsp;<html:reset value="RESET"/>
</td>
</tr>

</table>

</html:form>
</body>
</html>