On the submitted page, the smartupload component requires that <form action = "Upload. jsp" enctype = multipart/form-data method = post> be submitted using word throttling. The following is an example of upload.htm:
<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<! -- Saved from url = (0057)HTTP: /localhost: 8080/jspsmartfile/JSP/uploadtemplate. jsp-->
<HTML> <Meta content = "text/html; charset = gb2312" http-equiv = Content-Type>
<Meta content = "mshtml 5.00.2920.0" name = generator> <Body bgcolor = # e6e6e6> <br>
<Form action = "Upload. jsp" enctype = multipart/form-data method = post>
<Table>
<Tbody>
<Tr>
<TD> <font color = #000000 face = helv, helvetica size = 1> & nbsp; File
: & Nbsp; </font> & nbsp; <input size = 60 type = file name = "file"> </TD> </tr>
<Tr>
<Tr>
<TD> <font color = #000000 face = helv, helvetica size = 1> & nbsp; File
: & Nbsp; </font> & nbsp; <input size = 60 type = file name = "file1"> </TD> </tr>
<Tr>
<TD> <font color = #000000 face = helv, helvetica size = 1> & nbsp; File
: & Nbsp; </font> & nbsp; <input size = 60 type = text name = "text"> </TD> </tr>
<Tr>
<TD
Align = right> <input type = submit value = Send name = "send"> </TD> </tr> </tbody> </table> </form> </ body>
Let's take a look at the received page. After uploading the file to the server, we will directly store it in the database: Upload. jsp
<% @ Page contenttype = "text/html; charset = gb2312" %>
<% @ Page import = "Java. SQL. *" %>
<% @ Page import = "com. jspsmart. Upload. *" %>
<% @ Page import = "dbstep. idbmanager2000. *" %>
<%
// RealSample Upload Bean
Com. jspsmart. Upload. smartupload mysmartupload = new COM. jspsmart. Upload. smartupload ();
// InitialInitial
Mysmartupload. initialize (pagecontext );
// SetSets the upload maximum value.
Mysmartupload. setmaxfilesize (500*1024*1024 );
// UploadFile Loading
Mysmartupload. Upload ();
// FollowRing to retrieve all uploaded files
For (INT I = 0; I <mysmartupload. getfiles (). getcount (); I ++ ){
// ObtainFile to be uploaded
Com. jspsmart. Upload. File myfile = mysmartupload. getfiles (). GetFile (I );
If (! Myfile. ismissing ())
{
// ObtainFile name to be uploaded
String myfilename = myfile. getfilename ();
// ObtainFile name without a suffix
String suffix = myfilename. substring (0, myfilename. lastindexof ('.'));
// ObtainSuffix
String ext = mysmartupload. getfiles (). GetFile (0). getfileext ();
// ObtainFile Size
Int filesize = myfile. getsize ();
// WarrantyStorage path
String AA = getservletcontext (). getrealpath ("/") + "JSP \\";
String trace = AA + myfilename;
// ObtainGet other parameters
String explain = (string) mysmartupload. getrequest (). getparameter ("text ");
String send = (string) mysmartupload. getrequest (). getparameter ("send ");
// SetFiles are stored on the server.
Myfile. saveas (trace, mysmartupload. save_physical );
// LowerSave the uploaded file to the database.
// SetReading files to the stream
Java. Io. File file = new java. Io. File (TRACE );
Java. Io. fileinputstream FCM = new java. Io. fileinputstream (File );
Out. println (file. Length ());
// InputOpen Database
Resultset result = NULL;
String msql = NULL;
Preparedstatement prestmt = NULL;
Dbstep. idbmanager2000 dbaobj = new dbstep. idbmanager2000 ();
Dbaobj. openconnection ();
// SetFile written to database
Msql = "insert into marklist (markname, password, marksize, markdate, markbody) values (?,?,?,?,?) ";
Prestmt = dbaobj. Conn. preparestatement (msql );
Prestmt. setstring (1, "aaa1 ");
Prestmt. setstring (1, "0000 ");
Prestmt. setint (3, filesize );
Prestmt. setstring (4, dbaobj. getdatetime ());
Prestmt. setbinarystream (5, FS, (INT) file. Length ());
Dbaobj. Conn. setautocommit (true );
Prestmt.exe cuteupdate ();
Dbaobj. Conn. Commit ();
Out. println ("Upload successful !!! "). Tostring ());
}
Else
{Out. println ("Upload Failed !!! "). Tostring ());}
} // Corresponds to the preceding if
%>
Next, download is divided into two scenarios: 1. Download 2 directly from the database. Download from server
First, you can directly download the data from the database: Read the input stream from the database and convert it to a file.
<% @ Page contenttype = "text/html; charset = gb2312" %>
<% @ Page import = "Java. SQL. *" %>
<% @ Page import = "Java. Io. *" %>
<% @ Page import = "dbstep. idbmanager2000. *" %>
<%
Int bytesum = 0;
Int byteread = 0;
// InputOpen Database
Resultset result = NULL;
String SQL = NULL;
Preparedstatement prestmt = NULL;
Dbstep. idbmanager2000 dbaobj = new dbstep. idbmanager2000 ();
Dbaobj. openconnection ();
// ObtainObtain data in the database
SQL = "select * From t_local_zhongzhuan ";
Result = dbaobj. executequery (SQL );
Result. Next ();
// SetThe data in the database is read to the stream.
Inputstream instream = result. getbinarystream ("content ");
Fileoutputstream FS = new fileoutputstream ("C:/dffdsafd.doc ");
Byte [] buffer = new byte [1444];
Int length;
While (byteread = instream. Read (buffer ))! =-1)
{
Out. println ("<DT> <B>" + byteread + "</B> </DT> ");
Bytesum + = byteread;
System. Out. println (bytesum );
FS. Write (buffer, 0, byteread );
}
%>
In addition, the download from the server is as follows:
<% @ Page contenttype = "text/html; charset = gb2312" %>
<% @ Page import = "Java. Io. *" %>
<%
String filename = "zsc104.swf". tostring ();
F // readTo stream
Inputstream instream = new fileinputstream ("C:/zsc104.swf ");
// SetOutput Format
Response. Reset ();
Response. setcontenttype ("bin ");
Response. addheader ("content-disposition", "attachment; filename = \" "+ filename + "\"");
// FollowLoop to retrieve data from a stream
Byte [] B = new byte [100];
Int Len;
While (LEN = instream. Read (B)> 0)
Response. getoutputstream (). Write (B, 0, Len );
Instream. Close ();
%>
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