We have to use two jar files
1) commons-fileupload-1.2.2.jar
2) commons-io-2.3.jar
//------------------------------- upload.jsp ------------------------------------------
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>File Upload</title>
</head>
<body>
<table border="1" >
<tr>
<td>
<form method="post" action="UploadServlet" enctype="multipart/form-data">
<input type="file" name="uploadFile" />
<br/><br/>
<input type="submit" value="Upload" />
</form>
</td>
</tr>
</table>
</body>
</html>
//-------------------------------- message.jsp ---------------------------------------------
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Upload file</title>
</head>
<body>
<center>
<h2>${requestScope.message}</h2>
</center>
</body>
</html>
//------------------------------- web.xml -------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
id="WebApp_ID" version="2.5">
<display-name>UploadServletApp</display-name>
<servlet>
<description></description>
<display-name>UploadServlet</display-name>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>codejava.upload.UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
</web-app>
//------------------------------------ UploadServlet.java --------------------------------
package codejava.upload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet
{
private static final long serialVersionUID = 1L;
private static final String UPLOAD_DIRECTORY = "upload";
private static final int THRESHOLD_SIZE = 3145728;
private static final int MAX_FILE_SIZE = 41943040;
private static final int MAX_REQUEST_SIZE = 52428800;
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
if (!ServletFileUpload.isMultipartContent(request)) {
PrintWriter writer = response.getWriter();
writer.println("Request does not contain upload data");
writer.flush();
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(3145728);
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(41943040L);
upload.setSizeMax(52428800L);
String uploadPath = getServletContext().getRealPath("") +
File.separator + "upload";
File uploadDir = new File(uploadPath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
}
try
{
List formItems = upload.parseRequest(request);
Iterator iter = formItems.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem)iter.next();
if (!item.isFormField()) {
String fileName = new File(item.getName()).getName();
String filePath = uploadPath + File.separator + fileName;
File storeFile = new File(filePath);
item.write(storeFile);
}
}
request.setAttribute("message", "Upload has been done successfully!");
} catch (Exception ex) {
request.setAttribute("message", "There was an error: " + ex.getMessage());
}
getServletContext().getRequestDispatcher("/message.jsp").forward(request, response);
}
}
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