Hibernate使用sql语句查询

import java.util.Iterator;

importjava.util.List;

import java.util.Map;

import org.hibernate.Hibernate;

importorg.hibernate.SQLQuery;

importorg.hibernate.Session;

importorg.hibernate.Transaction;

import org.hibernate.transform.Transformers;

import com.hibernate.bean.SqlQueryBean;

importcom.hibernate.bean.User;

import com.hibernate.util.HibernateUtil;

public class SqlQueryTest {

 public static void main (String [] args){

sqlQueryAddScalar();

}

  static void sqlQueryAddEntity(){

     //获取Hibernate Session对象

     Session session = HibernateUtil.getSession();

     //开始事务

     Transaction tx = session.beginTransaction();

     //编写SQL语句

     String sqlString = "select * from user";

     //以SQL语句创建SQLQuery对象

     List l = session.createSQLQuery(sqlString)

                     //将查询ss实体关联的User类

                     .addEntity("ss",User.class)

                     //返回全部的记录集

                     .list();

     //遍历结果集

     Iterator it = l.iterator();

     while (it.hasNext()){

         //因为将查询结果与Student类关联，因此返回的是Student集合

         User s = (User)it.next();

         String a = s.getName();         System.out.println(a);

     }

     //提交事务

     tx.commit();

     session.close();

 }

staticvoidsqlQueryAddScalar(){

//返回Object[]的遍历

Sessionsession=HibernateUtil.getSession();

Transactiontransaction=session.beginTransaction();

Stringsql="select*fromuser";

SQLQuerys=(SQLQuery)session.createSQLQuery(sql);//.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP)

s.addScalar("id",Hibernate.INTEGER);//列名,数据类型

s.addScalar("name",Hibernate.STRING);

Listlist=s.list();

Object[]objects=(Object[])list.get(0);

System.out.println(objects[0]);

System.out.println(objects[1]);

//用MAP

SQLQueryss=(SQLQuery)session.createSQLQuery(sql).setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);

ss.addScalar("id",Hibernate.INTEGER);

ss.addScalar("name",Hibernate.STRING);

Listlist2=ss.list();

Mapmap=(Map)list2.get(0);

System.out.println(map.get("name"));

System.out.println(map.get("id"));

  //用LIST

  SQLQuery s3=(SQLQuery) session.createSQLQuery(sql).setResultTransformer(Transformers.TO_LIST);

s3.addScalar("id",Hibernate.INTEGER);

s3.addScalar("name",Hibernate.STRING);

Listlist3=s3.list();

Listlist4=(List)list3.get(0);

System.out.println(list4.get(0));

System.out.println(list4.get(1));

//用自定义的bean

SQLQuerye=(SQLQuery)session.createSQLQuery(sql).setResultTransformer(Transformers.aliasToBean(SqlQueryBean.class));

e.addScalar("id",Hibernate.INTEGER);

e.addScalar("name",Hibernate.STRING);

Listr=e.list();

SqlQueryBeansqb=(SqlQueryBean)r.get(0);

System.out.println(sqb.getId());

System.out.println(sqb.getName());

}

 

}