You need to download the jspSmartUpload. jar package by yourself before using it.
Here we find a jar package that supports Chinese characters, as shown below: http://www.bkjia.com/uploadfile/2012/0426/20120426093645364.rar
Copy the jar in the compressed package to the lib of the project.
Main Methods
Upload
// Create a new SmartUpload object
SmartUpload su = new SmartUpload ();
// Upload Initialization
Su. initialize (pageContext );
// Limit the maximum length of each uploaded file.
Su. setMaxFileSize (10000 );
// Limit the total length of uploaded data.
Su. setTotalMaxFileSize (20000 );
// Set the files that can be uploaded (with the extension limit). Only the doc and txt files are allowed.
Su. setAllowedFilesList ("doc, txt ");
// Sets the file that is not allowed to be uploaded (by using the extension limit). It is forbidden to upload files with exe, bat,
// Jsp, htm, html extension files and files without extension.
Su. setDeniedFilesList ("exe, bat, jsp, htm, html ,,");
// Upload a file
Su. upload ();
// Save all uploaded files to the specified directory
Int count = su. save ("/upload ");
Download
// Create a new SmartUpload object
SmartUpload su = new SmartUpload ();
// Initialization
Su. initialize (pageContext );
// Set contentDisposition to null to prevent the browser from automatically opening the file,
// Ensure that the object is downloaded after the link is clicked. If this parameter is not set, the downloaded file name extension is
// When the doc is used, the browser automatically opens it with word. When the extension is pdf,
// The browser will be opened with acrobat.
Su. setContentDisposition (null );
// Download an object
Su. downloadFile ("/upload/test.doc ");
**************************************** **************************************** **************************************
Application instance:
<% @ Page contentType = "text/html; charset = gb2312" language = "java" import = "java. io. *, java. awt. image, java. awt. image. *, com.sun.image.codec.jpeg. *, java. SQL. *, com. jspsmart. upload. *, java. util. * "%>
<%
SmartUpload mySmartUpload = new SmartUpload ();
Long file_size_max = 4000000;
String fileName2 = "", ext = "", testvar = "";
String url = "upload/"; // ensure that this directory exists in the root directory (that is, you need to create the corresponding folder yourself)
// Initialization
MySmartUpload. initialize (pageContext );
// Only files of this type can be uploaded
Try {
MySmartUpload. setAllowedFilesList ("jpg, gif"); // you can modify the file format as needed.
// Upload a file
MySmartUpload. upload ();
} Catch (Exception e ){
%>
<SCRIPT language = javascript>
Alert ("Upload only. jpg and. GIF image files allowed ");
Registry.location='upload.htm ';
</Script>
<%
}
Try {
Com. jspsmart. upload. File myFile = mySmartUpload. getFiles (). getFile (0 );
If (myFile. isMissing () {%>
<SCRIPT language = javascript>
Alert ("select the file to upload first ");
Registry.location='upload.htm ';
</Script>
<%}
Else {
// String myFileName = myFile. getFileName (); // get the name of the uploaded file
Ext = myFile. getFileExt (); // get the suffix
Int file_size = myFile. getSize (); // get the file size
String saveurl = "";
If (file_size <file_size_max ){
// Change the file name to obtain the millisecond value of the current upload time
Calendar calendar = Calendar. getInstance ();
String filename = String. valueOf (calendar. getTimeInMillis ());
Saveurl = application. getRealPath ("/") + url;
Saveurl + = filename + "." + ext; // save path
MyFile. saveAs (saveurl, SmartUpload. SAVE_PHYSICAL );
Out. print (saveurl );
String ret = "parent. HtmlEdit. focus ();";
Ret + = "var range = parent.HtmlEdit.doc ument. selection. createRange ();";
Ret + = "range. pasteHTML (' ');";
Ret + = "alert ('upload successful! ');";
Ret + = "too many location='upload.htm ';";
Out. print ("<script language = javascript>" + ret + "</script> ");
}
}
} Catch (Exception e ){
Out. print (e. toString ());
}
%>
Upload.htm
<Html>
<Head>
<Title> select an uploaded image </title>
</Head>
<Body>
<Table border = "0" align = "center" cellpadding = "0" cellspacing = "0">
<Tr>
<Td height = "45" align = "center" valign = "middle"> <form action = "uploadimage. jsp "method =" post "enctype =" multipart/form-data "name =" form1 ">
<Input type = "file" name = "file">
<Input type = "submit" name = "Submit" value = "Upload">
</Form> </td>
</Tr>
</Table>
</Body>
</Html>
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