A one-to-one relationship between hibernate

There are two types of maintenance for one-to-one relationships, which are divided into primary key associations and unique foreign key associations

There are two types of maintenance for one-to-one relationships, which are divided into primary key associations and unique foreign key associations

Primary KEY Association: (bidirectional)

(main control Party)


Person.java


Person {


private String username;


//reference to the accused party


private address address;


public String GetUserName () {


return username;


}


public void Setusername (String username) {


this.username = Username;


}


public Address getaddress () {


return address;


}


public void setaddress (address) {


this.address= address;


}


}


(passive side)


Address.java


address{


private String Addressname;


//References to the main control


private person;


public String Getaddressname () {


return addressname;


}


public void Setaddressname (String addressname) {


this.addressname= Addressname;


}


Public Person Getperson () {


return person;


}


public void Setperson (person person) {


this.person= person;


}


public String toString () {


return to New Tostringbuilder (this).


Append ("Addressname", Addressname).


toString ();


}


public boolean equals (Object o) {


if (!) ( o instanceof address) {


return false;


}


Address RHS = (address) O;


return new Equalsbuilder ()


. Appendsuper (Super.equals (o))


. Append (This.addressname, Rhs.getaddressname ())


. Isequals ();


}


public int hashcode () {


return new Hashcodebuilder (17, 37).


Append (addressname).


Tohashcode ();


}


}


Mapping File


<class name= "person" table= "person" >


<id name= "id" type= "long" column= "id" >


<generator class= "native"/>


</id>


<property name= "username" column= "username" type= "string"/>


<one-to-one


name= "Address"


class= "Address"


cascade= "All"


constrained= "false"


/>


</class>


<class name= "Address" table= "Address" >


<id name= "id" column= "id" >


<generator class= "foreign" >


<param name= "property" >person</param>


</generator>


</id>


<one-to-one name= ' person ' class= ' person ' constrained= ' true '/>


<property name= "Addressname" column= "Addressname" type= "string"/>


</class>