loginservlet.java

wap的java实现

import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
import javax.rmi.*;
import javax.naming.*;
import java.util.*;

public class LoginServlet extends HttpServlet
{

	SalesmanHome home;
	Salesman salesman;

	public void init() throws ServletException
	{
		try
		{
			System.out.println("trying to get initial context");
			Context ic = getInitialContext();
			System.out.println("Got InitContext");
			Object objRef = ic.lookup("Salesman");
			System.out.println("Got obj ref");
			home = (SalesmanHome) PortableRemoteObject.narrow(objRef,SalesmanHome.class);
			
			System.out.println("Got home");
		}catch(Exception e)
		{
			System.out.println("Error in init");
			e.printStackTrace();
		
		}
	}
	
   public void doGet(HttpServletRequest req, HttpServletResponse res)
                      throws ServletException, IOException 
   {
   	try
		{
			System.out.println("Within goGet");
	   	String name= null;
		   String password = null;

	
			name = req.getParameter("username");
			password = req.getParameter("password");
		   System.out.println("name - pawd " + name + " :" + password);
		   System.out.println(name.length());
		   System.out.println(password.length());

			name.trim();
			password.trim();
			System.out.println(name.length());
		   System.out.println(password.length());

			Collection users = home.findByName(name);
         Salesman tmpSalesman = (Salesman)home.findByPrimaryKey("0001");
         if(tmpSalesman != null)
         {
         	System.out.println("got some salesman");
            System.out.println(tmpSalesman.getPassword());
         }
                        
			System.out.println("got users size: " + users.size());
			if(users.size() <= 0)
			{
				res.sendRedirect(res.encodeURL("/Status.jsp?code=1"));
			}
	
			Iterator i = users.iterator();
      	while (i.hasNext()) 
      	{
				System.out.println("Beginning search");
      		Salesman salesman = (Salesman)i.next();
            String tmpPassword = (String)salesman.getPassword();
            if(password.equals(tmpPassword))
            {
            	HttpSession sess = req.getSession(false);
            	String id = (String)salesman.getPrimaryKey();
					sess.setAttribute("SalesmanId",id);
					sess.setAttribute("SalesmanName",name);
					System.out.println("Redirecting to mainmenu.jsp");
					res.sendRedirect(res.encodeURL("/MainMenu.jsp"));
					
				}
            
      	}
   	}catch(Exception npe)
		{
			res.sendRedirect(res.encodeURL("/Status.jsp?code=2"));
		}		
	   
   }
	
	
    private Context getInitialContext() throws NamingException
    {
    	Properties h = null;
    	try {
      // Get an InitialContext
      	h = new Properties();
      	h.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
	      h.put(Context.PROVIDER_URL, "t3://localhost:7001");
      	
    	}catch(Exception ne) {
      	System.out.println("Unable to get an initial context");
    	}
	return new InitialContext(h);   
   }

 }