public String onPrepareStatement(String arg0) { 
  return arg0; 
} 
 
public boolean onSave(Object arg0, Serializable arg1, Object[] arg2, 
    String[] arg3, Type[] arg4) throws CallbackException { 
  if (arg0 instanceof User) { 
    System.out.println("User to be saved=>"+((User)arg0).getName()); 
  } 
  return false; 
} 

public boolean onSave(Object arg0, Serializable arg1, Object[] arg2, 
    String[] arg3, Type[] arg4) throws CallbackException { 
  if (arg0 instanceof User) { 
    System.out.println("User to be saved=>"+((User)arg0).getName()); 
  } 
  //我们在这里添加123作为名字的前缀 
  User user = (User)arg0; 
  user.setName("123"+user.getName()); 
  return false; 
} 

public static void main(String[] args) { 
 
  Configuration cfg = new Configuration().configure(); 
  SessionFactory sessionFactory = cfg.buildSessionFactory(); 
  Interceptor interceptor = new MyInteceptor(); 
  Session session = sessionFactory.openSession(interceptor); 
     
  User user = new User(); 
  user.setName("shun"); 
     
  Transaction tx = session.beginTransaction(); 
  session.save(user); 
     
  tx.commit(); 
  session.close(); 
     
} 

User to be saved=>shun 
Hibernate: insert into USER (USER_NAME, age) values (?, ?) 
Hibernate: update USER set USER_NAME=?, age=? where USER_ID=? 

public boolean onLoad(Object arg0, Serializable arg1, Object[] arg2, 
    String[] arg3, Type[] arg4) throws CallbackException { 
     
  if (arg0 instanceof User) { 
    System.out.println("User to be loaded=>"+(arg2[0]+":"+arg2[1])); 
  } 
  User user = (User)arg0; 
  //判断哪个属性是name 
  for (int i = 0; i < arg3.length; i ++){ 
    if (arg3[i].equals("name")){ 
      user.setName(((String)arg2[i]).replace("123","")); 
      arg2[i] = ((String)arg2[i]).replace("123",""); 
    } 
  } 
  return false; 
} 

arg2[i] = ((String)arg2[i]).replace("123","");

public static void main(String[] args) { 
 
  Configuration cfg = new Configuration().configure(); 
  SessionFactory sessionFactory = cfg.buildSessionFactory(); 
  Interceptor interceptor = new MyInteceptor(); 
  Session session = sessionFactory.openSession(interceptor); 
     
  User user = (User)session.load(User.class,new Long(39)); 
     
  System.out.println("User name:"+user.getName()); 
  session.close(); 
     
} 

Hibernate: select user0_.USER_ID as USER1_0_0_, user0_.USER_NAME as USER2_0_0_, user0_.age as age0_0_ from USER user0_ where user0_.USER_ID=? 
User to be loaded=>123shun:0 
User name:shun 

public static void main(String[] args) { 
 
  String s1 = "shun1"; 
  String s2 = "shun1"; 
  System.out.println("s1==s2:"+(s1==s2)); 
     
} 

<class name="TUser" table="t_user" dynamic-insert="true" dynamic-update="true"> 
  <id name="id" column="id"> 
    <generator class="native" /> 
  </id> 
  <property name="name" type="java.lang.String" column="name"/> 
  <property name="age" type="java.lang.Integer" column="age"/> 
  <set name="addresses" cascade="all" table="t_address"> 
    <key column="user_id" /> 
    <!-- <one-to-many class="Address"/> --> 
    <element column="address" type="string" /> 
  </set> 
   
</class> 

<class name="Address" table="t_address" dynamic-insert="false" dynamic-update="false"> 
  <id name="id" column="id" type="java.lang.Integer"> 
    <generator class="native" /> 
  </id> 
  <property name="address" column="address" type="java.lang.String" /> 
  <many-to-one name="user" class="TUser"  
    column="user_id" not-null="true"></many-to-one> 
 
</class> 

public static void main(String[] args) { 
     
  Configuration cfg = new Configuration().configure(); 
  SessionFactory sessionFactory = cfg.buildSessionFactory(); 
  Session session = sessionFactory.openSession(); 
     
  TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
  Set set = user.getAddresses(); 
  session.close();   
  System.out.println("address size:"+set.size()); 
} 

address size:1 

TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
     
Transaction tx = session.beginTransaction(); 
Object obj = user.getAddresses().iterator().next(); 
     
user.getAddresses().remove(obj); 
     
tx.commit(); 
session.close(); 

Hibernate: delete from t_address where user_id=? 

<bag name="addresses" lazy="true" table="t_address"> 
  <key column="user_id" /> 
  <element type="string" column="address" /> 
</bag> 

public static void main(String[] args) { 
   
  Configuration cfg = new Configuration().configure(); 
  SessionFactory sessionFactory = cfg.buildSessionFactory(); 
  Session session = sessionFactory.openSession(); 
     
  TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
     
  System.out.println("address size:"+user.getAddresses().size()); 
  session.close(); 
} 

address size:3 

idbag name="addresses" table="t_address" lazy="true"> 
  <collection-id type="int" column="id"> 
    <generator class="identity" /> 
  </collection-id> 
  <key column="user_id" /> 
  <element type="string" column="address" /> 
</idbag> 

TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
   
Transaction tx = session.beginTransaction(); 
Object obj = user.getAddresses().iterator().next(); 
user.getAddresses().remove(obj); 
     
tx.commit(); 

Hibernate: delete from t_address where id=? 

<map name="addresses" table="t_address" lazy="true"> 
  <key column="user_id" /> 
  <index type="string" column="type" /> 
  <element type="string" column="address" /> 
</map> 

TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
   
System.out.println(user.getAddresses().get("home")); 
System.out.println(user.getAddresses().get("office")); 

ShanWei 
ShangHai 

<list name="addresses" table="t_address" lazy="true"> 
  <key column="user_id" /> 
  <index type="string" column="idx" /> 
  <element type="string" column="address" /> 
</list> 

TUser user = (TUser)session.load(TUser.class,new Integer(4)); 
   
Transaction tx = session.beginTransaction(); 
Object obj1 = user.getAddresses().get(0); 
Object obj2 = user.getAddresses().get(2); 
     
user.getAddresses().set(0,obj2); 
user.getAddresses().set(2,obj1); 
     
tx.commit();