loginaction.java

本系统是用struts编写的高校学生选课和成绩管理系统

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();

	}
}