Hibernate HQL 条件查询1

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Hibernate 编程 junit

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();

           Query query = session.createQuery("select s.id, s.name from Student s where s.name like ?");
           query.setParameter(0, "%1%");
           List students = query.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);
        }
    }
}