一.小文件的上传与下载
（1）JspSmartUpload是一个免费的上传与下载文件的JavaBean，比较适合小文件的上传与下载。
smartUpload中常用的类如下：
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<%@page import="com.jspsmart.upload.*"%>
<body>
<%
SmartUpload upload=new SmartUpload();
upload.initialize(pageContext); //初始化
upload.upload(); //开始上传
Files collection=upload.getFiles(); //获得上传文件的集合
File file=null;
String fileName=null;
int fileNumber=0;
for(int i=0;i<collection.getCount();i++)
{
file=collection.getFile(i);
fileName=file.getFileName();
if(!file.isMissing())
{
file.saveAs("/"+fileName);
out.print("<br>=========上传的文件信息=========");
out.print("<br>文件名:"+fileName);
out.print("<br>文件名后缀:"+file.getFileExt());
out.print("<br>文件大小:"+file.getSize());
fileNumber++;
}
}
out.print("<br>共计上传文件数:"+fileNumber);
%>
</body>
</html>
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<form action="exam506.jsp" method="post" enctype="multipart/form-data" name="form1" id="form1">
<p>请选择文件:</p>
<p>
<label>
<input type="file" name="file" />
</label>
</p>
<p>
<label>
<input type="file" name="file2" />
</label>
</p>
<p>
<input type="file" name="file3" />
</p>
<p>
<label>
<input type="submit" name="Submit" value="提交" />
</label>
</p>
</form>
</body>
</html>
注意的是要用到smartUpload.jar
时间： 2024-10-10 02:33:39