Hibernate之QBC--》用语法函数表示sql语句【个人感觉此技术相当之垃圾，反其正道而行】（二十七）

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package com.bjsxt.hibernate;

import java.util.Date;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.annotations.FetchMode;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.criterion.Restrictions;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class HibernateQLTest {
private static SessionFactory sf;

@BeforeClass
public static void beforeClass() {
sf = new AnnotationConfiguration().configure().buildSessionFactory();
}
@AfterClass
public static void afterClass() {
sf.close();
}

@Test
public void testSchemaExport() {
new SchemaExport(new AnnotationConfiguration().configure()).create(false, true);
}

@Test
public void testSave() {
Session session = sf.openSession();
session.beginTransaction();

for(int i=0; i<10; i++) {
Category c = new Category();
c.setName("c" + i);
session.save(c);
}

for(int i=0; i<10; i++) {
Category c = new Category();
c.setId(1);
Topic t = new Topic();
t.setCategory(c);
t.setTitle("t" + i);
t.setCreateDate(new Date());
session.save(t);

}

for(int i=0; i<10; i++) {

Topic t = new Topic();
t.setId(1);
Msg m = new Msg();
m.setCont("m" + i);
m.setTopic(t);
session.save(m);

}

session.getTransaction().commit();
session.close();
}

//is empty and is not empty
@Test
public void testQBC() {
Session session = sf.openSession();
session.beginTransaction();
//criterion 标准/准则/约束
Criteria c = session.createCriteria(Topic.class) //from Topic

.add(Restrictions.gt("id", 2)) //greater than = id > 2
.add(Restrictions.lt("id", 8)) //little than = id < 8
.add(Restrictions.like("title", "t_"))
.createCriteria("category")
.add(Restrictions.between("id", 3, 5)) //category.id >= 3 and category.id <=5
;
//DetachedCriterea
for(Object o : c.list()) {
Topic t = (Topic)o;
System.out.println(t.getId() + "-" + t.getTitle());
}
session.getTransaction().commit();
session.close();

}

public static void main(String[] args) {
beforeClass();

new HibernateQLTest().testQBC();
}
}