how to read values from web.xml using getInitParameter()

[momotaro]

Hi,
AM trying to read some values from my web.xml file using the
getInitParamete r method but the application crushes.
here is the web.xml and the servlet:

public Connection getConnection() {

		String url  = null;
		String username = null;
		String password = null;
		
		System.out.println(url);
		
		url = getInitParameter("url");
		username = getInitParameter("username");
		password = getInitParameter("password");
		try {
			
			Class.forName(getInitParameter("jdbc.driver"));
			con = (Connection) DriverManager.getConnection(url, username, password);
		} catch (Exception e) {
			System.out.println("impossible de se connecter a la base de données !");
		}
		return con;
	}

java.lang.NullPointerException
	javax.servlet.GenericServlet.getInitParameter(GenericServlet.java:82)
	com.ayach.tp3.DBConnection.getConnection(DBConnection.java:62)
	com.ayach.tp3.Formulaire.doGet(Formulaire.java:40)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

[r035198x]

If you defined the parameters global in your web.xml and not for a particular servlet then you should use getServletConte xt().getInitPar ameter("url") to retrieve the parameter values.