loginaction.java

本系统是新华社内部信息管理系统

package com.nitpro.struts.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;

import com.nitpro.struts.form.LoginForm;
import com.nitpro.vo.User;

/**
 * 时间: 04-18-2008
 * 处理登陆的Action
 * @author 邓锦溏
 * @version 1.0
 * @struts.action path="/login" name="loginForm" input="/form/login.jsp"
 *                scope="request" validate="true"
 */
public class LoginAction extends MappingDispatchAction {
	/*
	 * Generated Methods
	 */

	/**
	 * Method execute
	 * 通过form取得登录页面传来的数据，如果用户不存在，返回出错信息
	 * 如果存在用户，但用户密码错误，返回出错信息
	 * 若存在用户且密码正确，登录成功把用户信息保存在session中并转到成功页面
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method
		// stub

		String username = loginForm.getUsername();
		String userpwd = loginForm.getUserpwd();

		List users = com.nitpro.dao.DAOFactory.getDAOFactory().getUserDAO()
				.findByUsername(username);

		if (!users.isEmpty()) {
			User user = (User) users.get(0);
			if (userpwd.equals(user.getUserpwd())) {
				HttpSession session=request.getSession();
				session.setAttribute("user",user);
				return mapping.findForward("success");
			}
			request.setAttribute("errormessage", "该用户密码错误！");
			return mapping.findForward("fail");
		}
		request.setAttribute("errormessage", "该用户不存在！");
		return mapping.findForward("fail");
	}
}