<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
android
iphone
版本名称:<input type="text" id="versionName" name="versionName"><br><br>
版本号:<input type="text" id="versionCode" name="versionCode"><br><br>
版本描述:<input type="text" id="versionDesc" name="versionDesc"><br><br>
</div>
<div align="center">
上传文件:<input type="file" name="file1" id="file">
</div><br>
<div align="center">
<input type="submit" value="提交" onclick="isEmpty()" >
</div>
</form>
文本框不能为空,为空提交失败,求各位大神怎么写?