loginaction.java

学校管理系统 校园管理系统 struts+hibernate

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;
/**
 * @author 张健霖
 *
 */
public class LoginAction extends Action {
/**  actionforward  用来处理http的request response 
 *   Process the specified HTTP request, and create the corresponding HTTP response 
 *	 (or forward to another web component that will create it), with provision for handling 
 *   exceptions thrown by the business logic.
 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws UnsupportedEncodingException {
        HttpSession session = request.getSession();
		
		LoginForm loginForm = (LoginForm) form;
		Session s = HibernateUtil.currentSession();
		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);
				// list()函数用来查询
				if (query.list().size() > 0) {
					//保存stuid到session中
					session.setAttribute("stuid", ((Student) query.list().get(0)).getId());
					//s.close();
					return mapping.findForward("studentLoginsuccess");
				} else
					break;
			case 2:
				// 另外的一种查询语句
				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();
					System.out.println("adminLogin");
					return mapping.findForward("adminLoginsuccess");
					
				} else
					break;
			default:
				break;
			}
		} catch (HibernateException e) {
			e.printStackTrace();
			System.out.println("here have problem");
		} finally {
			System.out.println("here have problem too can't reach mapping.findForward");
			s.close();
		}

		ActionMessages errors = new ActionMessages();
		errors.add("login error", new ActionMessage("login.error"));
		saveErrors(request, errors);
		return mapping.getInputForward();

	}
}