Try {
Myupload. setMaxFileSize (1024*1024 );
Myupload. setTotalMaxFileSize (5*1024*1024 );
Myupload. setAllowedFilesList ("doc, txt, jpg, gif ");
Myupload. setDeniedFilesList ("exe, bat, jsp, htm, html ");
Myupload. upload (); // upload a file. This item is required.
Int count = myupload. getFiles (). getCount ();
Request myRequest = myupload. getRequest ();
String rndFilename, fileExtName, fileName, filePathName;
Date dt = null;
SimpleDateFormat fmt = new SimpleDateFormat ("yyyyMMdd ");
// Extract the uploaded file information one by one, while keeping the file
For (int I = 0; I <count; I ++ ){
File file = myupload. getFiles (). getFile (I );
If (file. isMissing ())
Continue;
FileName = new String (file. getFileName (). getBytes (), "UTF-8"); // get the file name
FilePathName = new String (file. getFilePathName (). getBytes (), "UTF-8 ");
FileExtName = file. getFileExt ();
Dt = new Date (System. currentTimeMillis ());
Thread. sleep (100 );
RndFilename = fmt. format (dt) + I + "." + fileExtName;
Out. println ("no." + (I + 1) + "File Information: <br> ");
Out. println ("file name:" + fileName + "<br> ");
Out. println ("File Extension:" + fileExtName + "<br> ");
Out. println ("file full name:" + filePathName + "<br> ");
Out. println ("file size:" + file. getSize ()/1024 + "kb <br> ");
// Create a file storage location
ServletContext context = req. getServletContext ();
String savePath = context. getRealPath ("/upload /");
Java. io. File folder = new java. io. File (savePath );
If (! Folder. exists ()){
Folder. mkdirs ();
}
Out. println ("file storage path:" + savePath );
File. saveAs (savePath + "/" + rndFilename, SmartUpload. SAVE_PHYSICAL );
}
} Catch (Exception e ){
Out. println ("File Upload Failed !!!! ");
E. printStackTrace ();
}
Out. flush ();
Out. close ();
}
}
Copy codeThe Code is as follows: <% @ page language = "java" contentType = "text/html; charset = UTF-8"
PageEncoding = "UTF-8" %>
<% @ Page import = "com. jspsmart. upload. *" %>
<%
// Set the request encoding method. Otherwise, garbled characters may occur in Chinese.
Request. setCharacterEncoding ("UTF-8 ");
%>
<! DOCTYPE html PUBLIC "-// W3C // dtd html 4.01 Transitional // EN" "http://www.w3.org/TR/html4/loose.dtd">
<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8">
<Title> upload a file instance </title>
<Script type = "text/javascript" src = "js/jquery-1.8.1.js"> </script>
<Script type = "text/javascript">
$ (Function (){
$ ("# Number"). change (function (){
Var number = $ ("# number"). attr ("value ");
$ ("# Files" pai.html ("");
For (var I = 0; I <number; I ++ ){
$ ("# Files"). append ("<input type = 'file' name = 'file'" + I + "'> <br/> ");
}
});
});
</Script>
</Head>
<Body>
<H2> upload a file instance Select the number of uploaded files:
<Select id = "number">
<Option value = "1" selected = "selected"> 1 </option>
<Option value = "2"> 2 </option>
<Option value = "3"> 3 </option>
<Option value = "4"> 4 </option>
<Option value = "5"> 5 </option>
</Select>
<Form action = "UploadServlet" method = "post" enctype = "multipart/form-data">
<Div id = "files"> </div>
<Input type = "submit" value = "submit"/>
</Form>
</Body>
</Html>
File Download:Copy codeThe Code is as follows: <%
Response. setContentType ("application/x-download"); // set it to download application/x-download
String filedownload = "/file name to be downloaded"; // relative path of the file to be downloaded
String filedisplay = "the name of the file to be saved to the user"; // The name of the file to be saved when the file is downloaded
String filenamedisplay = URLEncoder. encode (filedisplay, "UTF-8 ");
Response. addHeader ("Content-Disposition", "attachment; filename =" + filedisplay );
Try
{
RequestDispatcher dis = application. getRequestDispatcher (filedownload );
If (dis! = Null)
{
Dis. forward (request, response );
}
Response. flushBuffer ();
}
Catch (Exception e)
{
E. printStackTrace ();
}
Finally
{
}
%>
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