hibernate的基本操作

//输出每个班级的得分平均值
package classes;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

import DAO.HibernateSessionFactory;
import DAO.*;

public class Average {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
          Session session=HibernateSessionFactory.getSession();
          String sql="from TClassname aclass";
          Query query1=session.createQuery(sql);
          List list1=query1.list();
          Iterator it=list1.iterator();
          while(it.hasNext())
          {
          TClassname theclass=(TClassname)it.next();
        // String classid=theclass.getClassId();
          Query query2=session.createQuery("select avg(credit) from TUsers users where users.TClassname=:classname");
          query2.setEntity("classname", theclass);
          List list2=query2.list();
          System.out.println(theclass.getDes()+" : "+list2.get(0));
          }
          session.close();
}

}

//输出同班同学试题提交数与成功提交数
package classes;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

import DAO.HibernateSessionFactory;
import DAO.TClassname;
import DAO.TUsers;

public class SubmitNumber {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
        Session session=HibernateSessionFactory.getSession();
        String studentId="0706402023";
        TUsers user=(TUsers)session.get(TUsers.class, studentId);
        TClassname theclass=(TClassname)user.getTClassname();
     
        Query query1=session.createQuery("from TUsers users where users.TClassname=:classname");
        query1.setEntity("classname", theclass);
        List list1=query1.list();
        for(int index=0;index<list1.size();index++)
        {
        TUsers theuser=(TUsers)list1.get(index);
        Query query2=session.createQuery("select count(*) from TSubmits submit where submit.TUsers=:theuser"
        +" and submit.result='OK!'");
        query2.setEntity("theuser", theuser);
        List list2=query2.list();
       
        Query query3=session.createQuery("select count(*) from TSubmits submit where submit.TUsers=:theuser");
        query3.setEntity("theuser", theuser);
        List list3=query3.list();
        System.out.println(theuser.getName()+list3.get(0)+"/"+list2.get(0));
        }
        session.close();
}

}