[Forward / Redirect] Probléme

Version imprimable

09/08/2007, 11h04
wayle

[Forward / Redirect] Probléme

Bonjour,

Je vourdrais faire un forward vers une page JSP. (Servlet) --> (JSP)
est - il possible ?
09/08/2007, 11h05
kore62

ben oui
getServletContext().getRequestDispatcher("/page.jsp").forward(request, response);

Dans ma Servlet LoginServlet, je test si le login de l'utilisateur est dans la BD. si ok je stock la session. sinon je forward vers la page login.jsp.

login.jsp

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>BD AGR</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
  <P>  &nbsp;</P><P></P><P align="center">
			<IMG src="../images/db_agr.jpg" alt="DB AGR" border="0" align="middle">
		</P><FORM name="FrmLogin" action="/LoginServlet" method="post">
			<P> 
			</P><TABLE border="0" align="center">
				<TR>
					<TD>
						<P align="left">
							login
						</P></TD>
					<TD>
						<INPUT type="text" name="login" maxlength="15">
					</TD>
				</TR>
				<TR>
					<TD>
						<P align="left">
							Mot de Passe
						</P></TD>
					<TD>
						<INPUT type="password" name="passwd" maxlength="10">
					</TD>
				</TR>
				<TR>
					<TD></TD>
					<TD>
						<P align="right">
							<INPUT type="submit" name="Valider" value="Valider" ></P>
					</TD>
				</TR>
			</TABLE><P></P>
			<P>
				 &nbsp;
			</P>
			<P>
				 &nbsp;
			</P>
			<P>
				 &nbsp;
			</P>
			</FORM>
  </body>
</html>

loginServlet.java

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package com.ge.health.em.agr.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;


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.servlet.http.HttpSession;

import org.apache.log4j.Logger;

import com.ge.health.em.agr.db.DBManager;

public class LoginServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;
	
	
	private static final Logger logger = Logger.getLogger(LoginServlet.class.getName());
	
	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		
		String login = request.getParameter("login");
		String passwd = request.getParameter("passwd");
		
		
		
		
		DBManager db=null;
		Connection ct=null;
		Statement st=null;
		ResultSet rs=null;
		String query="";
		
		query = "select * from AGR_DEMANDEUR where NOM ='" + login +"'";
		try{
			db = DBManager.getInstance();
			ct = db.getConnection();
			st = ct.createStatement();
			rs = st.executeQuery(query);
			
			while (rs.next()) {
				HttpSession session = request.getSession(true);
			    session.setAttribute("login",login);             
				
				
			if  (!(login.equals (null)) && login.equals(rs.getString ("NOM")) && !(passwd.equals (null))){
			 
				System.out.println("ok");
				System.out.println(rs.getString ("NOM"));
			
				getServletContext().getRequestDispatcher("/jsp/index_main.jsp").forward(request, response);
				//String newURL = "/jsp/agr_consult/agr_search.jsp";
				//RequestDispatcher disp = request.getRequestDispatcher("/jsp/index_main.jsp");
				//disp.forward(request, response);
				System.out.println("ok forward"); 
				 
				}
				else if (!(login.equals(rs.getString ("NOM")) && !(passwd.equals(null)))) {
					System.out.println("ko");	
					getServletContext().getRequestDispatcher("/jsp/login.jsp").forward(request, response);
					//RequestDispatcher disp = request.getRequestDispatcher("/login.jsp");
					//disp.forward(request, response);
				    
				}
				else {
					out.println("Compte Inconnu !!");
				}

			}
			
		} catch (SQLException sqlEx){
			logger.error("SQLException in table Agr_Demandeur LOGIN() : " + sqlEx);
		} catch (Exception e){
			logger.error("Exception in table Agr_Demandeur LOGIN() : " + e);
		}finally{
			try {
				rs.close();
				rs = null;
				db.finalClose(st, ct);
			} catch (SQLException sqlEx) {
				logger.error("SQLException while closing ResultSet OR Connection in insertSQL() : " + sqlEx);
			}
		}
			
	
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}

web.xml

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<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
	xmlns="http://java.sun.com/xml/ns/j2ee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<distributable/>
  <servlet>
    <servlet-name>DAG_Read</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DAG_Read</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>User_Consult</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.User_Consult</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>Doc_Template</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.Doc_Template</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>Admin_Global</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.Admin_Global</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>DAG_FileTransfer</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DAG_FileTransfer</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>Log4J_InitFromDB</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.Log4J_InitFromDB</servlet-class>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet>
    <servlet-name>DB_DuplicateAnAgr</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DB_DuplicateAnAgr</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>DB_ModifyAnAgr</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DB_ModifyAnAgr</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>DB_DeleteAnAgr</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DB_DeleteAnAgr</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>DB_MoveAnAgr</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DB_MoveAnAgr</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>DB_CreateAnAgr</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.DB_CreateAnAgr</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>Export_Oracle2Excel</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.Export_Oracle2Excel</servlet-class>
  </servlet>
  
  <servlet>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>com.ge.health.em.agr.servlet.LoginServlet</servlet-class>
  </servlet>






  <servlet-mapping>
	<servlet-name>DAG_Read</servlet-name>
	    <url-pattern>/DAG_Read</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
	<servlet-name>User_Consult</servlet-name>
	<url-pattern>/User_Consult</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>Doc_Template</servlet-name>
    <url-pattern>/Doc_Template</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>Admin_Global</servlet-name>
    <url-pattern>/Admin_Global</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>DAG_FileTransfer</servlet-name>
    <url-pattern>/DAG_FileTransfer</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>Log4J_InitFromDB</servlet-name>
    <url-pattern>/Log4J_InitFromDB</url-pattern>
  </servlet-mapping>
    <servlet-mapping>
    <servlet-name>DB_DuplicateAnAgr</servlet-name>
    <url-pattern>/DB_DuplicateAnAgr</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>DB_ModifyAnAgr</servlet-name>
    <url-pattern>/DB_ModifyAnAgr</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
	<servlet-name>DB_DeleteAnAgr</servlet-name>
	<url-pattern>/DB_DeleteAnAgr</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>DB_MoveAnAgr</servlet-name>
    <url-pattern>/DB_MoveAnAgr</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>DB_CreateAnAgr</servlet-name>
    <url-pattern>/DB_CreateAnAgr</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>Export_Oracle2Excel</servlet-name>
    <url-pattern>/Export_Oracle2Excel</url-pattern>
  </servlet-mapping>
  
  <servlet-mapping>
    <servlet-name>LoginServlet</servlet-name>
    <url-pattern>/LoginServlet</url-pattern>
  </servlet-mapping>

  
  <welcome-file-list>
     <welcome-file>/jsp/login.jsp</welcome-file>
  </welcome-file-list></web-app>

d'où penses tu le probleme ??

En resultat:
j'ai une page blanche, avec l'URL de ma servlet ds le browser.
c'est bisar,

09/08/2007, 11h26
kore62

pourquoi tu mets ton login en session et aprés tu testes s'il est bon..????
En plus ca doit plus tot être HttpSession session = request.getSession() ; et non pas HttpSession session = request.getSession(true) ;

ta mise en session je la ferait plutot une fois que je suis sur que le login est bon... nan? donc dans le if.. A moins que j 'ai mal compris ton code...
09/08/2007, 11h33
wayle

oui, tout à fait, il faut tester d'abord et apres faire la mise en session.

Mais ce n'est pas normal de ne pas avoir ma page jsp aprés ?

essaie juste de mettre "/index_main.jsp" dans ton request dispatcher...

Essaie de mettre plutot ton traitement dans la methode doGet()... Moi j'ai un code qui fait a peu pres le meme traitement et ca fonctionne... tiens voilà le code de la servlet si ca peut te servir:

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package maServlet;
import src.*;
 
 
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
 
import java.sql.*;
 
/**
 * Servlet implementation class for Servlet: VerifConnectionSVR
 *
 */
 public class VerifConnectionSVR extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public VerifConnectionSVR() {
		super();
	}   	
 
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		String identifiantCh = request.getParameter("identifiant"), motDePasseCh = request.getParameter("motDePasse");
		String pathBd,loginBd, pwdBd;
		boolean isPresent = false;
		pathBd = getServletContext().getInitParameter("baseDeDonnees");
		loginBd = getServletContext().getInitParameter("login");
		pwdBd = getServletContext().getInitParameter("pwd");
 
		try{
		  java.sql.Connection cnx = java.sql.DriverManager.getConnection(pathBd,loginBd,pwdBd);
	      java.sql.Statement requete = cnx.createStatement();
	      java.sql.ResultSet rs = requete.executeQuery("SELECT * FROM client");
	      //Parcours du résultat
	      int idClient=0;
	      Client monClient = new Client();
	      while((rs.next())&&(!isPresent))
	      {
	              //Login et mot de passe correspond a une entree dans la base de données
	              if((identifiantCh.equals(rs.getString("nom")))&&(motDePasseCh.equals(rs.getString("motDePasse")))){
	            	  idClient = rs.getInt("refClient");  
	            	  isPresent = true;
	                  monClient.chargeDepuisBase(rs);
	              }
	      }
	      //On ferme la connexion a la base...
	      rs.close();
	      requete.close();
	      cnx.close();
 
	      //Je met le client en session
	      HttpSession session = request.getSession() ;
	      session.setAttribute("leClient", monClient) ;
	      System.out.println(((Client)session.getAttribute("leClient")).getNom());
	      //Je renvoie vers le menu
	      if(isPresent)
	    	  getServletContext().getRequestDispatcher("/listeMenu.jsp").forward(request,response);
	      else
	    	  getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
 
		}catch(SQLException e)
		{
			//probleme de connexion a la base, on revient sur la page d'acceuil...
			 getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
		}
	}  	
 
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request,response);
	}   	  	    
}

fait pas gaffe a la gestion de la connexion c'est jste une servlet de test... C'est pas le must en codage niveau connexion.. :?

j'ai fais un peu exactement comme toi, dans la methode doGet; mais j'ai toujours la page blache, avec un URL "/LoginServlet" dans mon browser.

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package com.ge.health.em.agr.servlet;
 
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
 
 
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.servlet.http.HttpSession;
 
import org.apache.log4j.Logger;
 
import com.ge.health.em.agr.db.DBManager;
import com.ge.health.em.agr.doc.Agr_Demandeur;
 
public class LoginServlet extends HttpServlet {
 
	private static final long serialVersionUID = 1L;
 
 
	private static final Logger logger = Logger.getLogger(LoginServlet.class.getName());
 
	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}
 
	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
 
	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
 
		String login = request.getParameter("login");
		String passwd = request.getParameter("passwd");
 
		DBManager db=null;
		Connection ct=null;
		Statement st=null;
		ResultSet rs=null;
		String query="";
 
		query = "select * from AGR_DEMANDEUR";
		try{
			db = DBManager.getInstance();
			ct = db.getConnection();
			st = ct.createStatement();
			rs = st.executeQuery(query);
 
			int id_Demandeur = 0;
			boolean b=false;
			String nom ="";
			String prenom ="";
 
 
			while((rs.next()) && !b) {
			if (login.equals(rs.getString ("NOM")) && !(passwd.equals (null))) {
 
				id_Demandeur =rs.getInt("DEMANDEUR_ID");
				nom=rs.getString("NOM");
				prenom=rs.getString("PRENOM");
				b=true;
 
			}	
			}
 
			rs.close();
			st.close();
			ct.close();
 
			HttpSession session = request.getSession();
			session.setAttribute("nom",nom);
 
			if (b) {
				getServletContext().getRequestDispatcher("/jsp/index_main.jsp").forward(request, response);
			} else getServletContext().getRequestDispatcher("/login.jsp").forward(request, response);
		} catch (SQLException sqlEx){
			logger.error("SQLException in table Agr_Demandeur LOGIN() : " + sqlEx);
		} catch (Exception e){
			logger.error("Exception in table Agr_Demandeur LOGIN() : " + e);
		}finally{
			try {
				rs.close();
				rs = null;
				db.finalClose(st, ct);
			} catch (SQLException sqlEx) {
				logger.error("SQLException while closing ResultSet OR Connection in insertSQL() : " + sqlEx);
			}
		}
	}
 
	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
 
		doGet(request,response);
 
	}
 
	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}
 
}

Faut-il changer le mapping de mon web.xml ?
:bug:

09/08/2007, 14h13
kore62

Non je trouve que ton web.xml est correct. De plus j'ai repris ton code de servlet dans eclispeWTP il genere le wb.xml c'est les memes parametres... Ca doit plutot etre au niveau de ton codage... Faut se pencher là dessus... :bug:
09/08/2007, 14h34
kore62

T'as essayer de redemarrer ton serveur? Apres avoir effectuer tes modifications?
09/08/2007, 14h37
wayle
ça pourra IE, je pense.
car, meme si je modifie mon web.xml
Code:

1 2 3 <welcome-file-list> <welcome-file>/jsp/login.jsp</welcome-file> </welcome-file-list>
par :
Code:

1 2 3 <welcome-file-list> <welcome-file>/jsp/index_main.jsp</welcome-file> </welcome-file-list>
et meme si redemarre mon Serveur JBoss, reouvrir une nouvelle fenetre, redeployer mon appli ...

j'ai toujours la page "login.jsp"

c'est etrange ça !! 8O
09/08/2007, 14h43
kore62

là je te dirai que malheureusement je ne vois pas où se trouve se problème.. C'est franchement bizarre! :bug:

Là je dirai que je suis "out" :aie: Désolé...:?
09/08/2007, 14h59
wayle

:king: OK

Merci bc de votre aide à moi.

à le prochain pb alors :lol:
09/08/2007, 18h14
wayle

c'est bon pour le pb du web.xml.

Mais, j'ai toujours la page blanche aprés le forward.

:help:

Citation:

<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.ge.health.em.agr.servlet.LoginServlet</servlet-class>
</servlet>

il faut coder ton web.xml:
Code:

1 2 3 4 5 6 7 8 9 10 <servlet> <servlet-name>LoginServlet</servlet-name> <servlet-class>com.ge.health.em.agr.servlet.LoginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/servlet/LoginServlet</url-pattern> </servlet-mapping>
Citation:

><FORM name="FrmLogin" action="/LoginServlet" method="post">

Code:

<form action="/contextSiteWeb/servlet/LoginServlet" method="post">

car ta method post renvoit vers la methode doGet.
Là ca devrait marcher. Je ne pense pas que l'erreur vient des foward qui sont correctes si tu as placer les "ect.jsp" dans le repertoire "/jsp".

13/08/2007, 11h30
wayle

:king:

C bon ça marche.
Merci BC.