Hibernate使用sql语句查询

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

import org.hibernate.Hibernate;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.transform.Transformers;

import com.hibernate.bean.SqlQueryBean;
import com.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();

}

static void sqlQueryAddScalar(){

//返回Object[]的遍历

Session session=HibernateUtil.getSession();

Transaction transaction=session.beginTransaction();

String sql=”select * from user”;

SQLQuery s=(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);

List list=s.list();

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

System.out.println(objects[0]);
System.out.println(objects[1]);

//用MAP

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

ss.addScalar(“id”,Hibernate.INTEGER);
ss.addScalar(“name”,Hibernate.STRING);

List list2=ss.list();

Map map = (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);

List list3=s3.list();

List list4=(List)list3.get(0);

System.out.println(list4.get(0));
System.out.println(list4.get(1));

//用自定义的bean

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

e.addScalar(“id”,Hibernate.INTEGER);
e.addScalar(“name”,Hibernate.STRING);

List r=e.list();

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

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

}

http://blog.csdn.net/jspamd/article/details/11579437