loginaction.java

一个小型的购物商店

/*
 * LoginAction.java
 *
 * Created on 2006年9月14日, 下午8:50
 */

package com.shopping.actions;

import com.shopping.model.User;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import com.shopping.formbean.LoginForm;
import com.shopping.dao.*;
import com.shopping.exception.*;

/**
 *
 * @author 曹昊
 * @version
 */

public class LoginAction extends Action {
    private final static String RELOGIN = "relogin";
    private final static String SUCCESS = "success";
    
    public ActionForward execute(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        ShoppingCartDao dao = DaoFactory.getInstance();
        HttpSession session = request.getSession();
        LoginForm loginForm = (LoginForm) form;
        String name = loginForm.getName();
        String password = loginForm.getPassword();
        boolean isCorrect = dao.validateLogin(name,password);
        if ( isCorrect == false){
            throw new LoginException();        //用户名或密码不对给予提示
        }
        Object existUser = (Object)session.getAttribute("user");
        User user = dao.queryUserInfo(name);
        if (existUser != null && name.equals(((User)existUser).getName()) && password.equals(((User)existUser).getPassword())){
            return mapping.findForward(RELOGIN);
        } else {
            session.setAttribute("user",user);
        }
        return mapping.findForward(SUCCESS);
    }
}