adminmanager.java

在线考试系统: 这是基于struts和Hibernate的最新技术的在线考试系统.数据库是MySql.能添加课程

/**
 * AdminManager
 */
package com.zjxy.hibernate.base;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Expression;

import com.zjxy.hibernate.HibernateSessionFactory;
import com.zjxy.hibernate.model.Admin;
import com.zjxy.hibernate.model.User;

/**
 * @author gradenarn
 *
 */
public class AdminManager {
	Session session;
	
	// 构造函数
	public AdminManager() throws HibernateException {
		session = getSession();
	}
	
	// 取得管理员信息列表
	public List getAdminList() throws HibernateException {
		return session.createCriteria(Admin.class).list();
	}
	
	// 添加管理员信息
	public void addAdmin(Admin admin, User user) throws HibernateException {
		Transaction tran = session.beginTransaction();
		session.save(admin);
		session.save(user);
		tran.commit();
	}
	
	// 判断输入的管理员帐号是否已经存在，存在则返回true，否则返回false
	public boolean getAdminByID(String adminID) {
		boolean flag = false;
		List list = new ArrayList();
		Criteria criteria = session.createCriteria(Admin.class);
		criteria.add(Expression.eq("adminID", adminID));
		list = criteria.list();
		if (list.size() == 1) {
			flag = true;
		}
		return flag;
	}
	
	// 管理员修改页面初期化时页面项目信息的取得
	public Admin getModifyInfoByID(int sequenceID) {
		Admin admin = new Admin();
		List list = new ArrayList();
		Integer seqID = Integer.valueOf(sequenceID);
		Criteria criteria = session.createCriteria(Admin.class);
		criteria.add(Expression.eq("sequenceID", seqID));
		list = criteria.list();
		admin = (Admin) list.get(0);
		return admin;
	}
	
	// 修改管理员信息
	public void modifyAdminInfo(Admin admin, User user) throws HibernateException {
		Transaction tran = session.beginTransaction();
		session.merge(admin);
		session.merge(user);
		tran.commit();
	}
	
	// 删除管理员信息
	public void delete(int sequenceID) throws HibernateException {
		
		Admin admin = new Admin();
		User user = new User();
		admin = this.getModifyInfoByID(sequenceID);
		user.setSequenceID(sequenceID);
		user.setUserID(admin.getAdminID());
		user.setPassword(admin.getAdminNO());
		user.setUserFlag("M");
		Transaction tran = session.beginTransaction();
		session.delete(admin);	
		session.delete(user);
		tran.commit();
	}
	
	// 修改管理员密码
	public void changePassword(Admin admin, User user) {
		Transaction tran = session.beginTransaction();
		session.merge(admin);
		session.merge(user);
		tran.commit();
	}
	
	// 关闭session
	public void closeSession() throws HibernateException {
		session.close();
	}
	
	// 得到session
	private Session getSession() throws HibernateException {
		return HibernateSessionFactory.currentSession();
	}
}