Récupérer un fichier posté dans une requête POST

J'ai fais ça il y a pas mal de temp et je sais que j'avais pas mal galéré...
A l'époque, j'avais crée un objet MultiparRequest qui était instancié avec l'objet HttpServletRequest et un chemin temporaire sur le serveur.
Voici le code de mon objet :
Code:
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package com.naos.enews.common.utilities;
 
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.log4j.Logger;
 
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.*;
 
public class MultipartRequest extends HashMap<String, List<String>> implements Constantes
{
	private final static Logger logger = Logger.getLogger(MultipartRequest.class);
	private File path = null;
	private Map<String, File> files = new HashMap<String, File>();
	private String remoteAddr;
	private String remoteHost;
	private int remotePort;
	private String remoteUser;
	private String method;
	private String serverName;
	private String encoding = UTF_8;
	private String requestUrl;
 
	public MultipartRequest(HttpServletRequest request, File pathName)
			throws Exception
	{
		this.path = pathName;
		if (path.exists())
		{
			if (!path.isDirectory())
			{
				throw new IOException(pathName + " : exists and is not a directory...");
			}
		}
		else
		{
			if (!path.mkdirs())
			{
				throw new IOException(pathName + " : Cannot create the directory... ");
			}
		}
		DiskFileItemFactory factory = new DiskFileItemFactory(MAX_LENGTH_FILE, new File(TMP_SYSTEM_PATH));
		ServletFileUpload upload = new ServletFileUpload(factory);
		// maximum size before a FileUploadException will be thrown
		upload.setSizeMax(MAX_LENGTH_FILE);
		try
		{
			List fileItems = upload.parseRequest(request);
			int size = fileItems.size();
			for (Object fileItem : fileItems)
			{
				FileItem fi = (FileItem) fileItem;
				String fieldName = fi.getFieldName();
				if (fi.isFormField())
				{
					String value = fi.getString();
					if (containsKey(fieldName))
					{
						List<String> vector = get(fieldName);
						vector.add(value);
					}
					else
					{
						List<String> vector = new ArrayList<String>();
						vector.add(value);
						put(fieldName, vector);
					}
				}
				else
				{
					String filename = fi.getName();
					if (fi.getSize() != 0)
					{
						File file = new File(path, filename);
						fi.write(file);
						files.put(fieldName, file);
					}
				}
			}
		}
		catch (FileUploadBase.InvalidContentTypeException e)
		{
			logger.debug("InvalidContentTypeException", e);
		}
		remoteAddr = request.getRemoteAddr();
		remoteHost = request.getRemoteHost();
		remotePort = request.getRemotePort();
		remoteUser = request.getRemoteUser();
		requestUrl = request.getRequestURL().toString();
		method = request.getMethod();
		serverName = request.getServerName();
	}
 
	public String getParameter(String name)
	{
		if (containsKey(name))
		{
			List<String> vector = get(name);
			if (vector != null && vector.size() != 0)
			{
				return vector.get(0);
			}
			else
			{
				return null;
			}
		}
		else
		{
			return null;
		}
	}
 
	public File getFile(String name)
	{
		return files.get(name);
	}
 
	public Iterator getFileNames()
	{
		return files.keySet().iterator();
	}
 
	public Iterator<String> getParameterNames()
	{
		return keySet().iterator();
	}
 
	public File getPath()
	{
		return path;
	}
 
	public String[] getParameterValues(String name)
	{
		if (containsKey(name))
		{
			List vector = get(name);
			if (vector != null && vector.size() != 0)
			{
				int size = vector.size();
				String[] values = new String[size];
				for (int i = 0; i < size; i++)
				{
					values[i] = vector.get(i)
							.toString();
				}
				return values;
			}
			else
			{
				return null;
			}
		}
		else
		{
			return null;
		}
	}
 
	public String getQueryString()
			throws UnsupportedEncodingException
	{
		Iterator<String> enumeration = getParameterNames();
		StringBuilder queryString = new StringBuilder();
		while (enumeration.hasNext())
		{
			String name = enumeration.next();
			String value = getParameter(name);
			queryString.append(URLEncoder.encode(name, encoding));
			queryString.append("=");
			queryString.append(URLEncoder.encode(value, encoding));
			queryString.append("&");
		}
		int taille = queryString.length();
		if (taille >= 2)
		{
			return queryString.deleteCharAt(queryString.length() - 1).toString();
		}
		else
		{
			return NaosStringUtils.EMPTY;
		}
	}
 
	public String getRemoteAddr()
	{
		return remoteAddr;
	}
 
	public String getRemoteHost()
	{
		return remoteHost;
	}
 
	public int getRemotePort()
	{
		return remotePort;
	}
 
	public String getRemoteUser()
	{
		return remoteUser;
	}
 
	public String getMethod()
	{
		return method;
	}
 
	public String getServerName()
	{
		return serverName;
	}
 
	public String getRequestURL()
	{
		return requestUrl;
	}
}
Je pense qu'il faut un peu l'adapter, mais ça devrait se faire sans trop de difficulté.
Voilà, j'espère que ça vous dépannera.

Cordialement,