downloading files using jsp

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downloading files using jsp

Apr 6th, 2008

i'm able to upload files using jsp into my server.Now i want to download those files with a popup window showing open save or cancel options.can anyone tell me the code for it.

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Re: downloading files using jsp

Apr 7th, 2008

You want to download Files from the server using jsp page ? If You want a file browser in jsp than you should search on google for Browser.jsp created by Taylor Bastien, David Levine, David Cowan
It has all the thing you require. I cant paste its code here because it is too long search for browser.jsp + its authors name u will find it. I hope this have solved your query partially other pop up window stuff yet there.

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Re: downloading files using jsp

May 12th, 2008

i'm able to upload files using jsp into my server.Now i want to download those files with a popup window showing open save or cancel options.can anyone tell me the code for it.[/quote]

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Re: downloading files using jsp

May 15th, 2008

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
<!-- upload.jsp -->
<%@ page import="java.io.*" %>
<%
String contentType = request.getContentType();
System.out.println("Content type is :: " +contentType);
if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) 
{
DataInputStream in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
while (totalBytesRead < formDataLength) 
{
byteRead = in.read(dataBytes, totalBytesRead, formDataLength);
totalBytesRead += byteRead;
}
String file = new String(dataBytes);
String saveFile = file.substring(file.indexOf("filename=\"") + 10);
//out.print("FileName:" + saveFile.toString());
saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
//out.print("FileName:" + saveFile.toString());
saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
//out.print("FileName:" + saveFile.toString());
//out.print(dataBytes);
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex + 1,contentType.length());
//out.println(boundary);
int pos;
pos = file.indexOf("filename=\"");
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
int boundaryLocation = file.indexOf(boundary, pos) - 4;
int startPos = ((file.substring(0, pos)).getBytes()).length;
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
saveFile = "D:\\java\tomcat5\\webapps\\ROOT\\images\\" + saveFile;
FileOutputStream fileOut = new FileOutputStream(saveFile);
//fileOut.write(dataBytes);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
out.println("File saved as " +saveFile);
}
%>
<!-- upload.jsp -->
<%@ page import="java.io.*" %>
<%
String contentType = request.getContentType();
System.out.println("Content type is :: " +contentType);
if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) 
{
DataInputStream in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
while (totalBytesRead < formDataLength) 
{
byteRead = in.read(dataBytes, totalBytesRead, formDataLength);
totalBytesRead += byteRead;
}
String file = new String(dataBytes);
String saveFile = file.substring(file.indexOf("filename=\"") + 10);
//out.print("FileName:" + saveFile.toString());
saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
//out.print("FileName:" + saveFile.toString());
saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
//out.print("FileName:" + saveFile.toString());
//out.print(dataBytes);
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex + 1,contentType.length());
//out.println(boundary);
int pos;
pos = file.indexOf("filename=\"");
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
int boundaryLocation = file.indexOf(boundary, pos) - 4;
int startPos = ((file.substring(0, pos)).getBytes()).length;
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
saveFile = "D:\\java\tomcat5\\webapps\\ROOT\\images\\" + saveFile;
FileOutputStream fileOut = new FileOutputStream(saveFile);
//fileOut.write(dataBytes);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
out.println("File saved as " +saveFile);
}
%>

this it the jsp code.In this u can only upload .doc & image files.

Html file for this is

 Help with Code Tags 
 html Syntax (Toggle Plain Text) 
<html>
<head></head>
<body background="bgcircle.gif">
<form method="post" action="products.jsp" name="upform" enctype="multipart/form-data">
  <table width="60%" border="0" cellspacing="1" cellpadding="1" align="center" class="style1">
    <tr>
      <td align="left">
	  <b><font color="white">Select a file to upload :</b></td>
    </tr>
    <tr>
      <td align="left">
        <input type="file" name="uploadfile" size="50">
        </td>
    </tr>
    <tr>
      <td align="left">
		<input type="hidden" name="todo" value="upload">
        <input type="submit" name="Submit" value="Upload">
        <input type="reset" name="Reset" value="Cancel">
        </td>
    </tr>
  </table>  
</form>
</body>
</html>
<html>
<head></head>
<body background="bgcircle.gif">
<form method="post" action="products.jsp" name="upform" enctype="multipart/form-data">
  <table width="60%" border="0" cellspacing="1" cellpadding="1" align="center" class="style1">
    <tr>
      <td align="left">
	  <b><font color="white">Select a file to upload :</b></td>
    </tr>
    <tr>
      <td align="left">
        <input type="file" name="uploadfile" size="50">
        </td>
    </tr>
    <tr>
      <td align="left">
		<input type="hidden" name="todo" value="upload">
        <input type="submit" name="Submit" value="Upload">
        <input type="reset" name="Reset" value="Cancel">
        </td>
    </tr>
  </table>  
</form>
</body>
</html>

Last edited by peter_budo : May 15th, 2008 at 4:23 am. Reason: Keep It Organized - please use [code] tags

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Re: downloading files using jsp

May 15th, 2008

YUCK, scriptlets.
Use servlets for anything requiring Java code.

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Re: downloading files using jsp

Jun 6th, 2008

Hi mahesh i just went through ur code,for downloading you can just save the filepath in the database and display witihn the links wen you click theh link you will get the download dialog box..../

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Re: downloading files using jsp

Jun 14th, 2008

hi can u tell me how to provide connectiviity between Servlet and database

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Re: downloading files using jsp

Jun 15th, 2008

we don't help thread hijacking kiddos.

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Re: downloading files using jsp

Jun 15th, 2008

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Originally Posted by smishra1985

hi can u tell me how to provide connectiviity between Servlet and database

Sun's tutorials on Java spell it all for you

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