hibernate.cfg.xml
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql:///test</property> <property name="connection.username">root</property> <property name="connection.password"></property> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hbm2ddl.auto">update</property> <property name="show_sql">true</property> <mapping resource="cn/itcast/domain/User.hbm.xml"/> </session-factory> </hibernate-configuration>
HibernateUitl
package cn.itcast.dao; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public final class HibernateUitl { private static SessionFactory sessionFactory; private HibernateUitl() { } static { Configuration cfg = new Configuration(); cfg.configure(); sessionFactory = cfg.buildSessionFactory(); } public static SessionFactory getSessionFactory() { return sessionFactory; } public static Session getSession() { return sessionFactory.openSession(); } }
UserDao
package cn.itcast.dao; import cn.itcast.domain.User; public interface UserDao { public void saveUser(User user); public User findUserByName(String name); public User findUserById(int id); public void updateUser(User user); public void remove(User user); }
UserDaoHibernateImpl
package cn.itcast.dao.impl; import org.hibernate.Criteria; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.criterion.Restrictions; import cn.itcast.dao.HibernateUitl; import cn.itcast.dao.UserDao; import cn.itcast.domain.User; public class UserDaoHibernateImpl implements UserDao { public User findUserById(int id) { Session s = null; try { s = HibernateUitl.getSession(); User user = (User) s.get(User.class, id); return user; } finally { if (s != null) s.close(); } } public User findUserByName(String name) { Session s = null; try { s = HibernateUitl.getSession(); Criteria c = s.createCriteria(User.class); c.add(Restrictions.eq("name", name)); User user = (User) c.uniqueResult(); return user; } finally { if (s != null) s.close(); } } public User findUserByName1(String name) { Session s = null; try { s = HibernateUitl.getSession(); String hql = "from User as user where user.name=:n"; Query q = s.createQuery(hql); q.setString("n", name); User user = (User) q.uniqueResult(); return user; } finally { if (s != null) s.close(); } } public void remove(User user) { Session s = null; Transaction tx = null; try { s = HibernateUitl.getSession(); tx = s.beginTransaction(); s.delete(user); tx.commit(); } finally { if (s != null) s.close(); } } public void saveUser(User user) { Session s = null; Transaction tx = null; try { s = HibernateUitl.getSession(); tx = s.beginTransaction(); s.save(user); tx.commit(); } finally { if (s != null) s.close(); } } public void updateUser(User user) { Session s = null; Transaction tx = null; try { s = HibernateUitl.getSession(); tx = s.beginTransaction(); s.update(user); tx.commit(); } finally { if (s != null) s.close(); } } }
User
package cn.itcast.domain; import java.util.Date; public class User { private int id; private String name; private Date birthday; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } }
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.domain"> <class name="User"> <id name="id"> <generator class="native" /> </id> <property name="name" unique="true"/> <property name="birthday" /> </class> </hibernate-mapping>
package cn.itcast; import java.util.Date; import cn.itcast.dao.UserDao; import cn.itcast.dao.impl.UserDaoHibernateImpl; import cn.itcast.domain.User; public class DaoTest { /** * @param args */ public static void main(String[] args) { UserDao dao = new UserDaoHibernateImpl(); User user = new User(); user.setName("name"); user.setBirthday(new Date()); System.out.println("1111"); dao.saveUser(user); user.setName("new name"); System.out.println("2222"); dao.updateUser(user); User u = dao.findUserByName(user.getName()); System.out.println("3333"); dao.remove(u); } }