代码如下：

%@ page contentType="text/html;charset=gb2312"%
html
head
meta http-equiv="Content-Type" content="text/html; charset=gb2312"
/head
body leftmargin="0" topmargin="0" bgcolor="#ffffff"
form action="upfilea.jsp" method="post" name="form1"
enctype="multipart/form-data"
input name="FileName" type="FILE" size="30"
input type="submit" name="Submit" value="上传"
/form
/body
/html
上传页面
%@ page contentType="text/html;charset=gb2312"%
%@ page import="java.sql.*"%
%@ page import="java.util.*"%
%@ page import="java.io.*"%
%@ page import="com.jspsmart.upload.*" %
%
//实例化上载bean
com.jspsmart.upload.SmartUpload mySmartUpload=new
com.jspsmart.upload.SmartUpload();
//初始化
mySmartUpload.initialize(pageContext);
//设置上载的最大值
mySmartUpload.setMaxFileSize(500 * 1024*1024);
//上载文件
mySmartUpload.upload();
//循环取得所有上载的文件
for (int i=0;i mySmartUpload.getFiles().getCount();i++)
{
//取得上载的文件
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i);
if (!myFile.isMissing())
{
//取得上载的文件的文件名
String myFileName=myFile.getFileName();
//取得不带后缀的文件名
String suffix=myFileName.substring(0,myFileName.lastIndexOf('.'));
//取得后缀名
String ext= mySmartUpload.getFiles().getFile(0).getFileExt();
if(!(ext.equals("gif")||ext.equals("jpg")||ext.equals("wmv")
||ext.equals("avi")||ext.equals("swf"))){
out.print(" script language='javascript'!--
alert('上传失败，图片格式为
GIF或者JPG，视频格式为WMV或者AVI，falsh为swf请重试！');
// --/script");
out.print(" script language='javascript'!--
window.location.href =
'uploadb.jsp'
// --/script");
}else
{
//取得文件的大小
int fileSize=myFile.getSize();
//保存路径
String aa=getServletContext().getRealPath("/")+"upload/";
Random mynum=new Random(1);
int num=mynum.nextInt(10000);
num=(int)Math.random()*10000;
java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat
("yyMMddhhmmss");
java.util.Date date=new java.util.Date();
String days=formatter.format(date);
days=days+num;
//System.out.println("days="+days);
//System.out.println("pre="+pre);
//取得别的参数
request.setCharacterEncoding("GB2312");
/*if(request.getSession(true).getAttribute("id")!="")
{
id = request.getSession(true).getAttribute("id").toString();
}
myFile.saveAs("upload/"+days+myFile.getFileName());
String pic="upload/"+days+myFile.getFileName();*/
myFile.saveAs("upload/"+days+"6."+ext);
String pic="upload/"+days+"6."+ext;
session.setAttribute("pic",pic);
out.print(" script
language='javascript'!--
parent.heheForm.pic.value='"+pic+"';
// --/script");
out.print(" script language='javascript'!--
alert('上传成功');
// --/script");
//下面的是将上载的文件保存到数据库中
//将文件保存在服务器端
//将文件写到数据库中
//response.sendRedirect("uploada.jsp");
}}else{out.print(" script language='javascript'!--
alert('文件上传失
败！');location=''
// --/script");}}
//与前面的if对应
%
html
head /head
body leftmargin="0" topmargin="0" bgcolor="#ffffff"
form
input type="text" name="pic" value=" %=session.getAttribute("pic")%"
size="30"
/form
/body
/html