显示层代码：
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ page import="com.jspsmart.upload.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<script type="text/javascript">
function addFile(){
var myTB = document.getElementByIdx_x_x("myTB");
var rowNum = myTB.rows.length;
var newRow = myTB.insertRow(rowNum);
var cells_0 = newRow.insertCell(0);
cells_0.innerHTML = "上传文件：";
var cells_1 = newRow.insertCell(1);
cells_1.innerHTML = "<input type='file' name='nfile' />";
}
</script>
</head>
<body>
<form enctype="multipart/form-data" method="post" action="doUpload.jsp">
<table id="myTB">
<tr>
<td>上传文件：</td>
<td><input type="file" name="nfile" /></td>
</tr>
</table>
<input type="button" value="添加" onclick="addFile()"><br>
<input type="submit" value="上传">
</form>
</body>
</html>
============================================================================
逻辑层代码：
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ page import="com.jspsmart.upload.*" %>
<%
SmartUpload su = new SmartUpload();
su.initialize(pageContext);
try{
su.setAllowedFilesList("jpg,jpeg,gif");
su.setDeniedFilesList("exe");
su.setMaxFileSize(1024*1024*1024*5);
su.setTotalMaxFileSize(1024*1024*1024*20);
su.setCharset("gbk");
su.upload();
}catch(Exception e){
out.print("您选择的文件非法或者长度超限，请检查！");
e.printStackTrace();
}
for(int i=0;i<su.getFiles().getCount();i++){
File file = su.getFiles().getFile(i);
if(!file.isMissing()){
Random rd = new Random();
Calendar cd = Calendar.getInstance();
String fileName = String.valueOf(cd.get(Calendar.YEAR))+String.valueOf(cd.get(Calendar.MONTH)+1)+String.valueOf(cd.get(Calendar.DATE))+
String.valueOf(cd.get(Calendar.MINUTE))+String.valueOf(cd.get(Calendar.SECOND))+String.valueOf(rd.nextInt(100))+"."+file.getFileExt();
String path = "upload\\";
path += fileName;
file.saveAs(path,SmartUpload.SAVE_VIRTUAL);
out.print("文件上传成功");
}
}
%>