Re: error with javac

[BuildSmart]

On Dec 3, 2007, at 03:14:38, rameau rameau1982 wrote: hi, I have 2 java classes in the same directory. One of them (SlateServlet.java) creates a new object from the other class (UsersDB.java). When I compile UsersDB, everything is correct and the .class archive is in the same path as the other .java archives. But when I want to compile the SlateServlet.java archive it gives me 3 errors telling that it doesn't knows the class UsersDB when it tries to create an object UserDB. What am I doing wrong? I've put the codes for this two java classes. Thankyou i believe your issues is package-less class files, manually make a jar file but probably better would be to make an ant or maven project to compile both of these sources into a single package. Tecnología, moda, motor, viajes,…suscríbete a nuestros boletines para estar a la última MSN Newsletters

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

import java.util.Date;

/**
 * @author Jordi Forga
 */

public class SlateServlet extends HttpServlet
{

    public void init()
    {
        ServletContext context = getServletContext();
        context.setAttribute("slate_text","");
        context.setAttribute("slate_user",null);
        context.setAttribute("slate_date",new Date());
        context.setAttribute("users_db",new UsersDB());
    }


    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
    {
        process(request,response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
    {
        process(request,response);
    }


    protected void process(HttpServletRequest request, HttpServletResponse 
response)
        throws IOException, ServletException
    {
        HttpSession oldSession = request.getSession(false);
        String sessionUser = null;
        if (oldSession != null) {
            sessionUser = (String) oldSession.getAttribute("user");
        }
        String serv_path = request.getServletPath();
        if (serv_path.equals("/view.do")) {
            view(response,sessionUser,null);
        } else if (serv_path.equals("/login.do")) {
            String name = request.getParameter("name");
            String passwd = request.getParameter("passwd");
            ServletContext context = getServletContext();
            UsersDB udb = (UsersDB)context.getAttribute("users_db");
            if (udb.checkUser(name,passwd)) {
                request.getSession(true).setAttribute("user",name);
                view(response,name,null);
            } else {
                view(response,sessionUser,"Error de autentificación");
            }
        } else if (serv_path.equals("/logout.do")) {
            request.getSession(true).invalidate();
            view(response,null,null);
        } else if (serv_path.equals("/modify.do")) {
            String message = request.getParameter("message");
            if (sessionUser != null) {
                ServletContext context = getServletContext();
                context.setAttribute("slate_text",message);
                context.setAttribute("slate_user",sessionUser);
                context.setAttribute("slate_date",new Date());
                view(response,sessionUser,null);
            } else {
                view(response,null,"Error: Debe autentificarse previamente");
            }
        } else {
            response.setContentType("text/plain");
            PrintWriter wr = response.getWriter();
            wr.println("Invalid path: "+serv_path);
        }
    }
    
    
    protected void view(HttpServletResponse response, String sessionUser, 
String errMsg)
        throws IOException
    {
        ServletContext context = getServletContext();
        String slateUser = (String) context.getAttribute("slate_user");
        String text = (String) context.getAttribute("slate_text");
        Date date = (Date) context.getAttribute("slate_date");
        String dateStr = date.toString();

        response.setContentType("text/html");
        PrintWriter wr = response.getWriter();
        wr.println("<HTML>");
        wr.println("<HEAD>");
        wr.println(" <META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; 
charset="+response.getCharacterEncoding()+"\">");
        wr.println(" <TITLE>Ejemplo de aplicaci&oacute;n con servlets</TITLE>");
        wr.println("</HEAD>");
        wr.println("<BODY BGCOLOR=\"lightblue\">");
        wr.println(" <center><H1>Ejemplo de aplicaci&oacute;n con 
servlets</H1></center>");
        wr.println(" <HR>");
        if (errMsg != null) {
            wr.println(" <P><FONT 
COLOR=\"red\"><B><EM>"+errMsg+"</EM></B></FONT></P>");
            wr.println(" <HR>");
        }
        if (sessionUser == null) {
            wr.println(" <FORM METHOD=\"POST\" ACTION=\"login.do\"><CENTER>");
            wr.println("  <P>Nombre de usuario:");
            wr.println("  <INPUT TYPE=\"text\" NAME=\"name\" SIZE=\"10\"></P>");
            wr.println("  <P>Clave de acceso:");
            wr.println("  <INPUT TYPE=\"password\" NAME=\"passwd\" 
SIZE=\"10\"></P>");
            wr.println("  <INPUT TYPE=\"submit\" NAME=\"login\" 
VALUE=\"Login\">");
            wr.println(" </CENTER></FORM>");
            wr.println(" <HR>");
            if (slateUser == null) {
                wr.println(" <H3>Pizarra vacía</H3>");
            } else {
                wr.println(" <H3>Pizarra modificada el d\u00eda <B>"+dateStr+
                        "</B> por <B>"+slateUser+"</B>:</H3>");
                wr.println(" <DIV><PRE>");
                wr.println(text);
                wr.println("  </PRE></DIV>");
            }
        } else {
            wr.println(" <FORM METHOD=\"POST\" ACTION=\"logout.do\"><CENTER>");
            wr.println("  <P><B>Usuario "+sessionUser+
                        "</B>: <INPUT TYPE=\"submit\" NAME=\"logout\" 
VALUE=\"Logout\"></P>");
            wr.println(" </CENTER></FORM>");
            wr.println(" <HR>");
            if (slateUser == null) {
                wr.println(" <H3>Pizarra vacía</H3>");
            } else {
                wr.println(" <H3>Pizarra modificada el d\u00eda <B>"+dateStr+
                        "</B> por <B>"+slateUser+"</B>:</H3>");
            }
            wr.println(" <FORM METHOD=\"POST\" ACTION=\"modify.do\"><CENTER>");
            wr.println("  <TEXTAREA NAME=\"message\" ROWS=\"10\" 
COLS=\"60\">"+text+
                        "</TEXTAREA><BR>");
            wr.println("  <INPUT TYPE=\"reset\" VALUE=\"Restaura\">");
            wr.println("  <INPUT TYPE=\"submit\" NAME=\"send\" 
VALUE=\"Canvia\">");
            wr.println(" </CENTER></FORM>");
        }
        wr.println(" <HR>");
        wr.println(" <P><A HREF=\"index.html\">Descripci\u00f3n de la 
aplicaci\u00f3n</A></P>");
        wr.println("</BODY>");
        wr.println("</HTML>");
    }


}





import java.util.Hashtable;



/**

 * @author Jordi Forga

 */





public class UsersDB

{



    public boolean checkUser(String name, String password)
    {
        return name.length() >= 5 && name.equals(password);
    }


}

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