推荐回答（3个）
下拉列表
s:select标签输出一个下拉列表框，相当于html代码中的
例子：
%@pagecontenttype="text/html;charset=gbk"%>
<%@taglibprefix="s"uri="/struts-tags"%>
使用name和list属性，list属性的值是一个列表
使用name和list属性，list属性的值是一个map
使用headerkey和headervalue属性设置header选项
headerkey="-1"headervalue="请选择您的学历"/>
使用emptyoption属性在header选项后添加一个空的选项
headerkey="-1"headervalue="请选择您的学历"
emptyoption="true"/>
使用multiple属性设置多选
headerkey="-1"headervalue="请选择您的学历"
emptyoption="true"
multiple="true"/>
使用size属性设置下拉框可显示的选项个数
headerkey="-1"headervalue="请选择您的学历"
emptyoption="true"
multiple="true"size="8"/>
使用listkey和listvalue属性，利用action实例的属性（property）来设置选项的值和选项的内容
listkey="id"listvalue="name"/>
使用方法很简单，只要知道这个标签的各属性代表什么含义就OK了。
先了解这几个属性就OK了。
list：一个集合，即下拉列表中的内容。
listValue：显示给用户的内容，即集合中一个对象的属性。
listKey：实际提交的值。
例如：list="studentList"
listValue="name"
listKey="id"
/>
下拉列表中的内容是一组学生的集合，而你看到的是name(学生姓名)，实际提交的值即id。
自己试下，然后看一下页面的源文件就明白了。
name="months"
headerKey="-1" headerValue="Select Month"
list="#{'01':'Jan', '02':'Feb', [...]}"
value="selectedMonth"
required="true"
/>
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