HttpServletRequest
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单选列表框的处理经验
前台的网页代码:
<select name="subject">
<option value="">--不选--</potion>
<option value="0">java</option>
<option value="1">c++</option>
<option value="2">jsp</option>
</select>
服务器端的程序处理代码:
String subject = request.getParameter ("subject");
//如果没有选择或是选择了“—不选--”项
if(subject == null || "".equals(subject))
{
//这里是用户没有选择时的处理语句
}
else
{
//这里是用户进行了选择时的处理语句
}
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