Hibernate 查询例子

import java.text.SimpleDateFormat;
import java.util.Iterator;
import java.util.List;

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

import junit.framework.TestCase;

/**
 * 条件查询
 * @author Administrator
 *
 */
public class SimpleConditionQueryTest extends TestCase {

 public void testQuery1() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   //可以拼字符串
   List students = session.createQuery("select s.id, s.name from Student s where s.name like '%1%'").list();
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }
 
 public void testQuery2() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
//   Query query = session.createQuery("select s.id, s.name from Student s where s.name like ?");
//   query.setParameter(0, "%1%");
//   List students = query.list();
   
   //可以使用？方式传递参数
   //参数的索引从0开始
   //传递的参数值，不用单引号引起来
   //注意方法链编程
   List students = session.createQuery("select s.id, s.name from Student s where s.name like ?")
               .setParameter(0, "%1%")
               .list();
   
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 } 

 public void testQuery3() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   //使用 ：参数名称 的方式传递参数值
   List students = session.createQuery("select s.id, s.name from Student s where s.name like :myname")
               .setParameter("myname", "%1%")
               .list();
   
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }  
 
 public void testQuery4() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   //使用 ：参数名称 的方式传递参数值
   List students = session.createQuery("select s.id, s.name from Student s where s.name like :myname and s.id=:myid")
               .setParameter("myname", "%1%")
               .setParameter("myid", 12)
               .list();
   
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }
 
 public void testQuery5() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   //支持in，需要使用setParameterList进行参数传递
   List students = session.createQuery("select s.id, s.name from Student s where s.id in(:myids)")
         .setParameterList("myids", new Object[]{1, 2, 3, 4, 5})
               .list();
   
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }   

 public void testQuery6() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   //查询2008年2月创建的学生
   List students = session.createQuery("select s.id, s.name from Student s where date_format(s.createTime, '%Y-%m')=?")
         .setParameter(0, "2008-02")
               .list();
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }   

 public void testQuery7() {
  Session session = null;
  try {
   session = HibernateUtils.getSession();
   session.beginTransaction();
   
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   
   //查询2008-01-10到2008-02-15创建的学生
   List students = session.createQuery("select s.id, s.name from Student s where s.createTime between ? and ?")
         .setParameter(0, sdf.parse("2008-01-10 00:00:00"))
         .setParameter(1, sdf.parse("2008-02-15 23:59:59"))
               .list();
   for (Iterator iter=students.iterator(); iter.hasNext();) {
    Object[] obj = (Object[])iter.next();
    System.out.println(obj[0] + "," + obj[1]);
   }
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   session.getTransaction().rollback();
  }finally {
   HibernateUtils.closeSession(session);
  }
 }   
}