Hibernate原生SQL语句查询

import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.Transaction;


public class TestSql {

@Test
public void selectAll() {
Session session=HibernateUitels.getSession();
Transaction tx = session.beginTransaction();

String sql="select * from student";
//创建sql查询对象
SQLQuery query = session.createSQLQuery(sql);
//调用方法查询结果
/* List<Object[]> list = query.list();
for(int i=0;i<list.size();i++) {
System.out.println(Arrays.toString(list.get(i)));
}*/
//指定结果集封装到那个对象中
query.addEntity(Student.class);
//调用方法查询结果
List<Student> list = query.list();
System.out.println(list);
tx.commit();
session.close();
}

2、使用setParameter(index,param)设置参数；

@Test
public void get() {
Session session=HibernateUitels.getSession();
Transaction tx = session.beginTransaction();
//书写sql语句
String sql="select * from student where id=?";
//创建sql查询对象
SQLQuery query = session.createSQLQuery(sql);
//给第一个问号设置参数
query.setParameter(0,19);
//调用方法查询结果
List<Student> list = query.list();
System.out.println(list);
tx.commit();
session.close();
}

3、mysql 中 limit 和 oracle 中 rownum

@Test
public void testRowNum() {
Session session=HibernateUitels.opensession();
Transaction tx = session.beginTransaction();

String sql="select * from ( select rownum r,a.* from table a where
rownum <= ? ) 
where r >= ?;";

SQLQuery query = session.createSQLQuery(sql);
query.addEntity(Student.class);
query.setParameter(0,10);
query.setParameter(1,5);
List<Student> list = query.list();
System.out.println(list);
tx.commit();
session.close();
}
}

在mysql中的sql语句:select * from table limit 0,10; 换成Oracle 换成 rownum