Hibernate实例

<?xml version="1.0" encoding='utf-8'?>
<!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://localhost:3306/funnyweb</property>
    <property name="connection.username">root</property>
    <property name="connection.password">leung</property>
    <property name="connection.pool_size">5</property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect</property>
    <property name="current_session_context_class">
        thread</property>
    <property name="cache.provider_class">
        org.hibernate.cache.NoCacheProvider</property>
    <property name="show_sql">true</property>
    <mapping resource="funnyweb/User.hbm.xml"/>
    
</session-factory>
</hibernate-configuration>
    

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
                                   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
 <class name="funnyweb.User" table="user">
  <id column="name" name="name"/>
  <property column="sex" generated="never" lazy="false" name="sex"/>
  <property column="birthday" generated="never" lazy="false" name="birthday"/>
  <property column="education" generated="never" lazy="false" name="education"/>
  <property column="school" generated="never" lazy="false" name="school"/>
  <property column="password" generated="never" lazy="false" name="password"/>
  <property name="address" type="funnyweb.AddressUserType">
      <column name="province"/>
      <column name="city"/>
  </property>
 </class>
</hibernate-mapping>

package funnyweb;

public class Address implements java.io.Serializable{
    private String province;
    private String city;
    
    public Address(){
    }
    
    public Address(String province,String city){
        this.province = province;
        this.city = city;
    }
    
    public String toString(){
        return (province+city);
    }
    
    public boolean equals(Object arg0){
        if(arg0==null)
            return false;
        if(this==arg0)
            return true;
        Address address = (Address)arg0;
        if((address.getCity()==this.getCity())
                &&(address.getProvince()==this.getProvince()))
            return true;
        else
            return false;
    }
    
    public int hashCode(){
        return (this.getCity().hashCode() + 
            this.getProvince().hashCode());
    }
    
    public void setProvince(String province){
        this.province = province;
    }
    
    public String getProvince(){
        return this.province;
    }
    
    public void setCity(String city){
        this.city = city;
    }
    
    public String getCity(){
        return this.city;
    }
}

package funnyweb;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.hibernate.Hibernate;

public class AddressUserType implements UserType {
    private static final int[] TYPES = {Types.VARCHAR,Types.VARCHAR};

    public Object assemble(Serializable arg0, Object arg1)
            throws HibernateException {
        return deepCopy(arg0);
    }

    public Object deepCopy(Object arg0) throws HibernateException {
        if(arg0==null){
            return null;
        }
        Address address = (Address)arg0;
        return new Address(address.getProvince(),address.getCity());
    }

    public Serializable disassemble(Object arg0) 
            throws HibernateException {
        return (Serializable)deepCopy(arg0);
    }

    public boolean equals(Object arg0, Object arg1) 
            throws HibernateException {
        if(arg0==arg1){
            return true;
        }
        if(arg0==null||arg1==null){
            return false;
        }
        return arg0.equals(arg1);
    }

    public int hashCode(Object arg0) throws HibernateException {
        Address address = (Address)arg0;
        return address.hashCode();
    }

    public boolean isMutable() {
        return true;
    }

    public Object nullSafeGet(ResultSet arg0, String[] arg1, Object arg2)
            throws HibernateException, SQLException {
        String province = (String)Hibernate.STRING.nullSafeGet(arg0,
                arg1[3]);
        String city = (String)Hibernate.STRING.nullSafeGet(arg0,
                arg1[4]);
        
        return (province==null&&city==null)?null:
            new Address(province,city);
    }

    public void nullSafeSet(PreparedStatement arg0, Object arg1, int arg2)
            throws HibernateException, SQLException {
        Address address = (arg1==null)?new Address():(Address)arg1;
        
        Hibernate.STRING.nullSafeSet(arg0, address.getProvince(), arg2);
        Hibernate.STRING.nullSafeSet(arg0, address.getCity(), arg2+1);
    }

    public Object replace(Object arg0, Object arg1, Object arg2)
            throws HibernateException {
        return arg0;
    }

    public Class returnedClass() {
        return Address.class;
    }

    public int[] sqlTypes() {
        return TYPES;
    }

}

package funnyweb;
import java.sql.Date;
public class User {
    private String name;
    private String sex;
    private Date birthday;
    private Address address;
    private String education;
    private String school;
    private String password;
    
    public User(){
        
    }
    
    public User(String name,String sex,Date birthday,
            Address address,String education,String school,
            String password){
        this.name = name;
        this.sex = sex;
        this.birthday = birthday;
        this.address = address;
        this.education = education;
        this.school = school;
        this.password = password;
    }
    
    public void setName(String name){
        this.name = name;
    }
    
    public String getName(){
        return this.name;
    }
    
    public void setSex(String sex){
        this.sex = sex;
    }
    
    public String getSex(){
        return this.sex;
    }
    
    public void setBirthday(Date birthday){
        this.birthday = birthday;
    }
    
    public Date getBirthday(){
        return this.birthday;
    }
    
    public void setAddress(Address address){
        this.address = address;
    }
    
    public Address getAddress(){
        if(this.address==null){
            this.address = new Address();
        }
        return this.address;
    }
    
    public void setEducation(String education){
        this.education = education;
    }
    
    public String getEducation(){
        return this.education;
    }
    
    public void setSchool(String school){
        this.school = school;
    }
    
    public String getSchool(){
        return this.school;
    }
    
    public void setPassword(String password){
        this.password = password;
    }
    
    public String getPassword(){
        return this.password;
    }
}

package funnyweb;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil {
    private static final SessionFactory sessionFactory;
        static{
            try{
                sessionFactory = new Configuration().configure()
                    .buildSessionFactory();
            }catch(Throwable ex){
                ex.printStackTrace();
                throw new ExceptionInInitializerError(ex);
            }
        }

        public static final ThreadLocal session = 
            new ThreadLocal();
        public static Session currentSession() 
            throws HibernateException{
            Session s = (Session)session.get();
            if(s==null||!s.isOpen()){
                s = sessionFactory.openSession();
                session.set(s);
            }
            return s;
        }
        
        public static void rollBack(Transaction tx){
            try{
                if(tx!=null){
                    tx.rollback();
                }
            }catch(HibernateException e){
                System.out.println("rollback failed." + e);
            }
        }
        
        public static void closeSession() throws HibernateException{
            Session s = (Session)session.get();
            session.set(null);
            if(s!=null)
                s.close();
        }
}

package funnyweb;

import org.hibernate.*;

public class UserDAO {
    
    private Session session;
    private Transaction tx;
    
    public UserDAO(){
        session = HibernateUtil.currentSession();
    }
    
    public void create(User user) throws RuntimeException{
        try{
            tx = session.beginTransaction();
            session.save(user);
            session.flush();
            tx.commit();
        }catch(HibernateException e){
            HibernateUtil.rollBack(tx);
        }finally{
            HibernateUtil.closeSession();
        }
    }
}