[Servlet]uploader un fichier

Version imprimable

08/06/2005, 13h46
napster

[Servlet]uploader un fichier

salut,
comment faire pour uploader un fichier du client au serveur en utilisant une servlet?
merci .

[Modéré par Didier] : ajout de tag dans le titre - Les règles du forum Java
08/06/2005, 13h50
BainE

comme ca sans connaitre tout tes besoin je dirai soit un mail avec le fichier en piece jointe, ou bien des sockets !!!
par contr il faudra que ton serveur soi en ecoute permanente avec cette solution...
08/06/2005, 14h30
MagicJava

Pour uploader un fichier, tu utilises un formulaire défini comme suit :

Code:

<FORM method="post" name="uploadForm" enctype="multipart/form-data" action=" ">

dans lequel tu utilises un input de type file.

Du côté de ton servlet, il existe des apis pour récupérer ton fichier et tous les paramêtres de ton formulaire.
Personnelement je te recommande l'api de Jakarta Commons FileUpload : http://jakarta.apache.org/commons/fileupload/ .
Elle est simple d'utilisation et bien documentée.
28/02/2009, 16h47
natoine

Bonjour,

serait-il possible d'avoir un exemple complet?
Je dois charger un fichier de l'utilisateur vers mon serveur.
J'ai peu de temps devant moi pour fouiller donc ça pourrait m'aider bcp.

Bon ben je progresse.

Voilà ou j'en suis :

doGet je charge une fichier index.html
Dans index.html j'ai :

Code:

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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 
<FORM method="post" name="uploadForm"  enctype="multipart/form-data" action="SurveyAnswersScriptalImport">
<input name="fichier" type="file" size="50" maxlength="100000" accept="text/plain">
<input type="submit" name="uploadForm" value="Envoyer">
</FORM>
 
</body>
</html>

L'objectif est de transmettre un fichier .xml et de le parser avec la méthode en fin de code.
Sauf que là, je sais pas faire.
J'essaye de récupérer le paramétre "fichier" qui apparemment serait une String...
et du coup j'essaye dans bienrecu.jsp d'afficher cette String qui apparemment est null (ou alors je me suis planté pour passer fichier en attribut dans bien reçu).

Le contenu de bienrecu.jsp :

Code:

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<%@ page 
	import="intermed.survey.*"
	import="javax.servlet.*"
	import="java.io.IOException"
	language="java"
	contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"
%>
<servlet:defineObjects/>
		<%
                                String _file = (String)request.getAttribute("_file");
                %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<span>Bien reçu <%= _file %> </span>
</body>
</html>

Le code de ma servlet (ce qui est important se situe au niveau du doGet et du doPost) :

Code:

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package intermed.survey;
 
import java.io.IOException;
import java.rmi.RemoteException;
import java.util.Iterator;
import java.util.List;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import localhost.axis.services.interviewee.Interviewee;
import localhost.axis.services.interviewee.IntervieweeService;
import localhost.axis.services.interviewee.IntervieweeServiceLocator;
 
import org.jdom.Document;
import org.jdom.Element;
 
/**
 * Servlet implementation class SurveyAnswersScriptalImport
 */
public class SurveyAnswersScriptalImport extends HttpServlet {
	private static final long serialVersionUID = 1L;
 
	IntervieweeService _serviceDoc = new IntervieweeServiceLocator();
	Interviewee _port_interviewee; 
 
    /**
     * @see HttpServlet#HttpServlet()
     */
    public SurveyAnswersScriptalImport() {
        super();
        // TODO Auto-generated constructor stub
    }
 
	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//PrintWriter _out = response.getWriter();
		response.setContentType("text/html");
		RequestDispatcher _srd = this.getServletContext().getRequestDispatcher(response.encodeURL("/WEB-INF/jsp/index.jsp"));
		_srd.include(request, response);
	}
 
	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		String _file = request.getParameter("fichier");
		request.setAttribute("_file", _file);
 
		response.setContentType("text/html");
		RequestDispatcher _srd = this.getServletContext().getRequestDispatcher(response.encodeURL("/WEB-INF/jsp/bienrecu.jsp"));
		_srd.include(request, response);
	}
 
	public void parseXMLScriptalAnswers(Document _xmlScriptal , String _id_user)
	{
		int _id_survey = -1;
		Element _racine = _xmlScriptal.getRootElement();
		List _osdatas = _racine.getChildren("OSDATA");
		Iterator _osdata_it = _osdatas.iterator();
		while(_osdata_it.hasNext())
		{
			Element _osdata = (Element)_osdata_it.next();
			//peut ressembler à "id-survey-1-id-question-1-id-pa-4" ou  à "id-survey-1-id-question-1"
			String _osdata_name = _osdata.getAttribute("name").getValue(); 
			String _osdata_value = _osdata.getAttribute("value").getValue();
			String _osdata_date = _osdata.getAttribute("lastStrokeDateTime").getValue();
			if(!_osdata_name.contains("id-pa")) //c'est une réponse à une question libre
			{
				_id_survey = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-survey-") + "id-survey-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-survey-") + "id-survey-".length())));
				int _id_question = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-question-") + "id-question-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-question-") + "id-question-".length())));
				System.out.println("[SurveyAnswersScriptal] id_survey : " + _id_survey + " id_question : " + _id_question);
				try {
					this._port_interviewee.postFreeAnswer(_id_user, _id_question, _osdata_value);
				} catch (RemoteException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			else
			{
				_id_survey = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-survey-") + "id-survey-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-survey-") + "id-survey-".length())));
				int _id_question = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-question-") + "id-question-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-question-") + "id-question-".length())));
				int _id_pa  = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-pa-") + "id-pa-".length() , _osdata_name.length()));
				System.out.println("[SurveyAnswersScriptal] id_survey : " + _id_survey + " id_question : " + _id_question + " id_pa : " + _id_pa);
 
				//déterminer le type de question
				try {
					if(this._port_interviewee.isCheckQuestion(_id_question))
					{
						if(Integer.parseInt(_osdata_value)==1) this._port_interviewee.postCheckAnswer(_id_user, _id_question, _id_pa);
						else this._port_interviewee.postUnCheckAnswer(_id_user, _id_question, _id_pa);
					}
					else if(this._port_interviewee.isOrdoQuestion(_id_question))
					{
						this._port_interviewee.postOrdoAnswer(_id_user, _id_question, _id_pa, Integer.parseInt(_osdata_value));
					}
					else if(this._port_interviewee.isRadioQuestion(_id_question))
					{
						if(Integer.parseInt(_osdata_value)==1) this._port_interviewee.postRadioAnswer(_id_user, _id_question, _id_pa);
						else this._port_interviewee.postUnCheckAnswer(_id_user, _id_question, _id_pa);
					}
					else if(this._port_interviewee.isValueQuestion(_id_question))
					{
						this._port_interviewee.postValueAnswer(_id_user, _id_question, _id_pa, _osdata_value);
					}
				}
				catch (RemoteException e) {
					// TODO Auto-generated catch block
					System.out.println("[SurveyAnswerScriptal] WS not responding");
					e.printStackTrace();
				}
			}
		}
 
		try {
			this._port_interviewee.validateSurvey(_id_user, _id_survey);
		} 
		catch (RemoteException e) {
			// TODO Auto-generated catch block
			System.out.println("[SurveyAnswerScriptal] WS not responding");
			e.printStackTrace();
		}
	}
 
 
}

Please Help!
Que fais-je de mal...

Salut,

Ton paramétre fichier n'est pas un string... plutôt un 'multipart/form-data'. Il faut utiliser la procédure d'exemple du Upload pour comprendre : Commons FileUpload

J'ai obtenu ce code là (qui est en prod) :
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 <%@page import="org.apache.commons.fileupload.*" %> <%@page import="org.apache.commons.io.*" %> <%@page import="java.util.List, java.io.File, java.util.Iterator" %> [...] boolean isMultipart = FileUpload.isMultipartContent(request); if(!isMultipart){ request.setAttribute("message", "Request was not multipart!"); request.getRequestDispatcher("userIndex.jsp").forward(request, response); return; } DiskFileUpload upload = new DiskFileUpload(); List items = upload.parseRequest(request); Iterator itr = items.iterator(); while(itr.hasNext()){ FileItem item = (FileItem) itr.next(); if(!item.isFormField()) { File fullFile = new File(item.getName()); String path=getServletContext().getRealPath("/")+"tmp/"; File savedFile = new File(path,fullFile.getName()); item.write(savedFile); } }
L'ensemble est dans une JSP, et les fichier envoyés sont placés dans un répertoire temporaire : .\tmp\ -qui est dans la racine de l'application.

Merci.
Je n'avais pas posté mais j'ai fini par trouver une solution.
Donc j'ai récupéré la lib fileupload (commons-fileupload-1.2.1.jar)

Dans index.jsp, j'ai un formulaire en POST avec un textarea et un champ d"'upload de fichier.

Je teste si la réponse est multipart dans le doPost:

Code:

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boolean isMultipart = ServletFileUpload.isMultipartContent(request);
		if(isMultipart) request.setAttribute("multipart", "yes");
		else request.setAttribute("multipart", "no");

Je crée les un FileItemFactory et un ServletFileUpload :

Code:

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// Create a factory for disk-based file items
		FileItemFactory factory = new DiskFileItemFactory();
 
		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);

Je parse l'upload :

Code:

List items = upload.parseRequest(request);

Je process les items (iterateur puis test sur chaque item, si il vient d'un champ de fromulaire, c'est le textarea sinon c'est le fichier uploadé) :

Code:

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// Process the uploaded items
			Iterator iter = items.iterator();
			while (iter.hasNext()) {
			    FileItem item = (FileItem) iter.next();
 
			    if (item.isFormField())
			    {
			    	_user_name = item.getString();
			    }
			    else 
			    {
			    	fileName = item.getName();
			    	String contentType = item.getContentType();
			    	boolean isInMemory = item.isInMemory();
			    	long sizeInBytes = item.getSize();
 
			    	InputStream uploadedStream = item.getInputStream();

Je poste ici mon code.

Servlet.java (l'essentiel est dan le doPost):

Code:

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package intermed.survey;
 
import java.io.IOException;
import java.io.InputStream;
import java.rmi.RemoteException;
import java.util.Iterator;
import java.util.List;
 
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.rpc.ServiceException;
 
import localhost.axis.services.interviewee.Interviewee;
import localhost.axis.services.interviewee.IntervieweeService;
import localhost.axis.services.interviewee.IntervieweeServiceLocator;
 
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
 
/**
 * Servlet implementation class SurveyAnswersScriptalImport
 */
public class SurveyAnswersScriptalImport extends HttpServlet {
	private static final long serialVersionUID = 1L;
 
	IntervieweeService _serviceDoc = new IntervieweeServiceLocator();
	Interviewee _port_interviewee; 
 
    /**
     * @see HttpServlet#HttpServlet()
     */
    public SurveyAnswersScriptalImport() {
        super();
        // TODO Auto-generated constructor stub
    }
 
	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//PrintWriter _out = response.getWriter();
		response.setContentType("text/html");
		RequestDispatcher _srd = this.getServletContext().getRequestDispatcher(response.encodeURL("/WEB-INF/jsp/index.jsp"));
		_srd.include(request, response);
	}
 
	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// Check that we have a file upload request
		boolean isMultipart = ServletFileUpload.isMultipartContent(request);
		if(isMultipart) request.setAttribute("multipart", "yes");
		else request.setAttribute("multipart", "no");
 
		// Create a factory for disk-based file items
		FileItemFactory factory = new DiskFileItemFactory();
 
		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);
 
		// Parse the request
		String _user_name ="";
		String fileName ="";
		try 
		{
			List /* FileItem */ items = upload.parseRequest(request);
 
			// Process the uploaded items
			Iterator iter = items.iterator();
			while (iter.hasNext()) {
			    FileItem item = (FileItem) iter.next();
 
			    if (item.isFormField())
			    {
			    	_user_name = item.getString();
			    }
			    else 
			    {
			    	fileName = item.getName();
			    	String contentType = item.getContentType();
			    	boolean isInMemory = item.isInMemory();
			    	long sizeInBytes = item.getSize();
 
			    	InputStream uploadedStream = item.getInputStream();
			    	SAXBuilder sxb = new SAXBuilder();
			    	try {
						Document _xml = sxb.build(uploadedStream);
						try {
							this.parseXMLScriptalAnswers(_xml, _user_name);
						} catch (ServiceException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					} catch (JDOMException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
			    	// = new Document(new StringReader(uploadedStream.toString()));
			    	uploadedStream.close();
			    }
			}
		} 
		catch (FileUploadException e) {
			// TODO Auto-generated catch block
 
			e.printStackTrace();
		}
 
		request.setAttribute("_user_name", _user_name);
		request.setAttribute("_fileName", fileName);
 
		response.setContentType("text/html");
		RequestDispatcher _srd = this.getServletContext().getRequestDispatcher(response.encodeURL("/WEB-INF/jsp/bienrecu.jsp"));
		_srd.include(request, response);
	}
 
	public void parseXMLScriptalAnswers(Document _xmlScriptal , String _id_user) throws ServiceException
	{
		this._port_interviewee = this._serviceDoc.getinterviewee();
		int _id_survey = -1;
		Element _racine = _xmlScriptal.getRootElement();
		List _osdatas = _racine.getChildren("OSDATA");
		Iterator _osdata_it = _osdatas.iterator();
		while(_osdata_it.hasNext())
		{
			Element _osdata = (Element)_osdata_it.next();
			//peut ressembler à "id-survey-1-id-question-1-id-pa-4" ou  à "id-survey-1-id-question-1"
			String _osdata_name = _osdata.getAttribute("name").getValue(); 
			System.out.println("[Servlet parseXMLScriptalAnswers] _osdata_name : "+ _osdata_name);
			String _osdata_value = _osdata.getAttribute("value").getValue();
			String _osdata_date = _osdata.getAttribute("lastStrokeDateTime").getValue();
			if(!_osdata_name.contains("id-pa")) //c'est une réponse à une question libre
			{
				_id_survey = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-survey-") + "id-survey-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-survey-") + "id-survey-".length())));
				int _id_question = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-question-") + "id-question-".length() , _osdata_name.length()));
				System.out.println("[SurveyAnswersScriptal] id_survey : " + _id_survey + " id_question : " + _id_question);
				try {
					this._port_interviewee.postFreeAnswer(_id_user, _id_question, _osdata_value);
				} catch (RemoteException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			else
			{
				_id_survey = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-survey-") + "id-survey-".length() , _osdata_name.indexOf("-", _osdata_name.indexOf("id-survey-") + "id-survey-".length())));
				//_id_survey = Integer.parseInt(_osdata_name.substring(9,11));
				int _id_question = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-question-") + "id-question-".length()  , _osdata_name.indexOf("-", _osdata_name.indexOf("id-question-") + "id-question-".length())));
				int _id_pa  = Integer.parseInt( _osdata_name.substring(_osdata_name.indexOf("id-pa-") + "id-pa-".length() , _osdata_name.length()));
				System.out.println("[SurveyAnswersScriptal] id_survey : " + _id_survey + " id_question : " + _id_question + " id_pa : " + _id_pa);
 
				//déterminer le type de question
				try {
					if(this._port_interviewee.isCheckQuestion(_id_question))
					{
						if(Integer.parseInt(_osdata_value)==1) this._port_interviewee.postCheckAnswer(_id_user, _id_question, _id_pa);
						else 
						{
							System.out.println("[SurveyAnswersScriptal] id_user : " + _id_user + " id_question : " + _id_question + " id_pa : " + _id_pa);
							this._port_interviewee.postUnCheckAnswer(_id_user, _id_question, _id_pa);
						}
					}
					else if(this._port_interviewee.isOrdoQuestion(_id_question))
					{
						this._port_interviewee.postOrdoAnswer(_id_user, _id_question, _id_pa, Integer.parseInt(_osdata_value));
					}
					else if(this._port_interviewee.isRadioQuestion(_id_question))
					{
						if(Integer.parseInt(_osdata_value)==1) this._port_interviewee.postRadioAnswer(_id_user, _id_question, _id_pa);
						else this._port_interviewee.postUnCheckAnswer(_id_user, _id_question, _id_pa);
					}
					else if(this._port_interviewee.isValueQuestion(_id_question))
					{
						this._port_interviewee.postValueAnswer(_id_user, _id_question, _id_pa, _osdata_value);
					}
				}
				catch (RemoteException e) {
					// TODO Auto-generated catch block
					System.out.println("[SurveyAnswerScriptal] WS not responding");
					e.printStackTrace();
				}
			}
		}
 
		try {
			this._port_interviewee.validateSurvey(_id_user, _id_survey);
		} 
		catch (RemoteException e) {
			// TODO Auto-generated catch block
			System.out.println("[SurveyAnswerScriptal] WS not responding");
			e.printStackTrace();
		}
	}
 
 
}

index.jsp :

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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 
<FORM method="post" name="uploadForm"  enctype="multipart/form-data" action="SurveyAnswersScriptalImport">
<input type="text" name="user_name">
<input name="fichier" type="file" size="50" maxlength="100000" accept="text/plain">
<input type="submit" value="Envoyer">
</FORM>
 
</body>
</html>

bienrecu.jsp :

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<%@ page 
	import="intermed.survey.*"
	import="javax.servlet.*"
	import="java.io.IOException"
	language="java"
	contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"
%>
<servlet:defineObjects/>
		<%
                                String _user_name = (String)request.getAttribute("_user_name");
                                String _fileName = (String)request.getAttribute("_fileName");
                %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<span>L'utilisateur <%=_user_name %> a uploadé le fichier <%=_fileName %>
</span>
</body>
</html>