Java Source Codes and Everything: Upload a file to a server-Java Source Code [JSP]

The below code will give you the idea how to upload a file to a server location. We are using a specific folder “uploadedFile” in the server current directory for the uploaded files.

To implement upload functionality, we will be using FileUpload and IO packages under common packages of Apache. This will ease out our job of coding this.

Links to download the jar files for the above.

http://commons.apache.org/fileupload/
http://commons.apache.org/io/

We will be creating two JSPs one of which will be the first page which will be asking for the files to browse and upload. After submitting the file, it will give us the details of the file which we have uploaded.

Below are the sample JSPs:
uploadfileToServer.jsp

fileUpload.jsp

<%@ page import="org.apache.commons.fileupload.*, org.apache.commons.fileupload.servlet.ServletFileUpload, org.apache.commons.fileupload.disk.DiskFileItemFactory, org.apache.commons.io.FilenameUtils, java.util.*, java.io.File, java.lang.Exception, java.io.*" %> <% String filePath = new String(""); %> <html> <head> <title>File Upload</title> </head> <body> <h1>Data Received at the Server</h1> <hr/> <% if (ServletFileUpload.isMultipartContent(request)){ ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory()); List fileItemsList = servletFileUpload.parseRequest(request); FileItem fileItem = null; Iterator it = fileItemsList.iterator(); while (it.hasNext()){ FileItem fileItemTemp = (FileItem)it.next(); if (fileItemTemp.isFormField()){ %> Name-value Pair Info: Field name: <%= fileItemTemp.getFieldName() %> Field value: <%= fileItemTemp.getString() %> <% } else fileItem = fileItemTemp; } if (fileItem!=null){ String fileName = fileItem.getName(); %> Uploaded File Info: Content type: <%= fileItem.getContentType() %> Field name: <%= fileItem.getFieldName() %> File name: <%= fileName %> File size: <%= fileItem.getSize() %> <% /* Save the uploaded file if its size is greater than 0. */ if (fileItem.getSize() > 0){ fileName = FilenameUtils.getName(fileName); String dirName = "./uploadedFile/"; File saveTo = new File(dirName + fileName); filePath = dirName + fileName; try { fileItem.write(saveTo); %> The uploaded file has been saved successfully. <% } catch (Exception e){ e.printStackTrace(); %> An error occurred when we tried to save the uploaded file. <% } } } } %> </body> </html>

Java Source Codes and Everything

Friday, August 21, 2009

Upload a file to a server-Java Source Code [JSP]

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