package com.stuman.web.struts.action;import java.io.UnsupportedEncodingException;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.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.action.ActionMessage;import org.apache.struts.action.ActionMessages;import org.hibernate.HibernateException;import org.hibernate.Query;import org.hibernate.Session;import com.stuman.dao.hibernate.HibernateUtil;import com.stuman.domain.Admin;import com.stuman.domain.Student;import com.stuman.domain.Teacher;import com.stuman.web.struts.form.LoginForm;public class LoginAction extends Action {	// --------------------------------------------------------- Instance	// Variables	// --------------------------------------------------------- Methods	/**	 * Method execute	 * 	 * @param mapping	 * @param form	 * @param request	 * @param response	 * @return ActionForward	 * @throws UnsupportedEncodingException	 */	public ActionForward execute(ActionMapping mapping, ActionForm form,			HttpServletRequest request, HttpServletResponse response)			throws UnsupportedEncodingException {		// TODO Auto-generated method stub		HttpSession session = request.getSession();		Session s = HibernateUtil.currentSession();		LoginForm loginForm = (LoginForm) form;		String sort = loginForm.getSort();		String username = loginForm.getUsername();		String password = loginForm.getPassword();		int loginSort = Integer.parseInt(sort);		String[] userlist = new String[2];		userlist[0] = username;		userlist[1] = password;		try {			HibernateUtil.beginTransaction();			String str = new String();			switch (loginSort) {			case 1:				str = " from Student as stu where stu.name=:stuName and stu.password=:stuPassword";				Query query = s.createQuery(str);				System.out.println(username + "  " + password);				query.setString("stuName", username);				query.setString("stuPassword", password);				if (query.list().size() > 0) {					session.setAttribute("stuid", ((Student) query.list().get(0)).getId());					s.close();					return mapping.findForward("studentLoginsuccess");				} else					break;			case 2:				str = " from Teacher tea where tea.name = '" + username						+ "' and tea.password ='" + password + "'";				if (s.createQuery(str).list().size() > 0) {					session.setAttribute("teaid", ((Teacher) s.createQuery(str)							.list().get(0)).getId());					s.close();					return mapping.findForward("teacherLoginsuccess");				} else					break;			case 3:				str = " from Admin admin where admin.name = '" + username						+ "' and admin.password ='" + password + "'";				System.out.println(username + "  " + password);				if (s.createQuery(str).list().size() > 0) {					session.setAttribute("id", ((Admin) s.createQuery(str)							.list().get(0)).getId());					s.close();					return mapping.findForward("adminLoginsuccess");				} else					break;			default:				break;			}		} catch (HibernateException e) {			e.printStackTrace();		} finally {			s.close();		}		ActionMessages errors = new ActionMessages();		errors.add("login error", new ActionMessage("login.error"));		saveErrors(request, errors);		return mapping.getInputForward();	}}