loginaction.java

该项目采用Struts框架

package com.cattsoft.login_out.action;

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

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.cattsoft.DAOFactory.DAOFactory;
import com.cattsoft.form.LoginForm;
import com.cattsoft.vo.User;

public class LoginAction extends Action {
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		LoginForm loginform = (LoginForm) form;
		// 得到form表单的值
		String username = loginform.getUsername();
		String password = loginform.getPassword();
		String role_id = loginform.getRole_id();
		// 根据得到的值去查询信息，得到返回值
		boolean flag = DAOFactory.getInstance().queryBy(username, password,role_id);
		// 判断
		if (flag) {
			// 通过验证,把用户id和用户名保存到session中
			int userId = DAOFactory.getInstance().queryUserIdBy(username);
			request.getSession().setAttribute("user_id", userId);
			request.getSession().setAttribute("username",username);
			String name = DAOFactory.getInstance().queryNameBy(username);
			request.setAttribute("name",name);
			if ("A".equals(role_id)) {
				return mapping.findForward("admin");
			} else if ("B".equals(role_id)) {
				return mapping.findForward("manager");
			} else {
				return mapping.findForward("employee");
			}
		} else {
			request.setAttribute("error","用户名或密码错误！");
			return mapping.findForward("loginFailed");
		}
	}
}