login.java

一个虚拟训练系统.主要使用j2ee框架实现.

package com.jsfcompref.trainer.backing;

import com.jsfcompref.trainer.UserBean;
import com.jsfcompref.trainer.UserRegistry;
import com.jsfcompref.trainer.util.UserUtil;
import com.jsfcompref.trainer.util.JSFUtil;
import java.io.IOException;
import javax.faces.application.Application;
import javax.faces.application.FacesMessage;
import javax.faces.component.html.HtmlInputSecret;
import javax.faces.component.html.HtmlInputText;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


/**
 * Backing bean for login.jsp
 */


public class Login {

  private HtmlInputText userid;
  private HtmlInputSecret password;

  private final static String AUTH_USER = "Authorized_User";

  public Login() {
  }


  public String login() {
    //Grab UserRegistry Managed Bean

    UserRegistry userRegCopy = 
      (UserRegistry)JSFUtil.getManagedObject("UserRegistry");

    // Call findByUserCredentials method 
    // and retrieve currentUser which matches credentials
    UserBean currentUser = 
      userRegCopy.findUserByCredentials(userid.getValue().toString(), password.getValue().toString());

    if (currentUser == null) { 
      // login failed
      FacesContext.getCurrentInstance().addMessage(null, 
                          new FacesMessage("Invalid Login!"));
      return "failure";
    } else { 
      // login success
      UserBean managedUserBean = 
        (UserBean)JSFUtil.getManagedObject("UserBean");
      UserUtil.copyUserProperties(currentUser, managedUserBean);
      managedUserBean.setIsLoggedIn(true);
      
      // Place authorized user on session to disable security filter
      JSFUtil.storeOnSession(FacesContext.getCurrentInstance(), AUTH_USER, "Authorized_User");
      return "success";
    }
  }



    public String logout() throws IOException{    
      ExternalContext ectx = FacesContext.getCurrentInstance().getExternalContext();
      HttpServletResponse response = (HttpServletResponse)ectx.getResponse();
      HttpSession session = (HttpSession)ectx.getSession(false);
      session.invalidate();    
      
      FacesContext ctx =  FacesContext.getCurrentInstance();
      Application app = ctx.getApplication();
      app.getNavigationHandler().handleNavigation(ctx, "/welcome.jsp", "welcome");
      
      // To avoid using the navigation handler you could also use...
      //response.sendRedirect("../index.jsp");
      return null;    
    
    }




  public void setUserid(HtmlInputText userid) {
    this.userid = userid;
  }


  public HtmlInputText getUserid() {
    return userid;
  }


  public void setPassword(HtmlInputSecret password) {
    this.password = password;
  }


  public HtmlInputSecret getPassword() {
    return password;
  }


}