Set Set mappings in Hibernate

Set set mapping three elements (from JavaBean mapping to data ORM)

1, Collection table (foreign key table, child table) name

2., specify the collection table foreign key <key column= "" >

3. Other elements of the collection table <element type= "" column= "" >

  <set name= "AddressSet" table= "User_addressset" order-by= "Address ASC" >             <key column= "UserId" ></ key>              <element type= "string" column= "Address" ></element>            

Note that when you access the collection element, you want new

But this is a better notation.

private int id;private String name;//private set<string> addressset;//database does not save this private set<string> Addressset=new hashset<string> ();//recommended to write  simplified code writing

　　

public void Test () {Session session=sessionfactory.opensession (); Transaction tx=session.begintransaction (); User User=new user (); Set<string> set=new hashset<string> () set.add ("Bengbu");//objects in the object are Set.add ("Xuancheng") that need new, User.setname ("SS"); User.setaddressset (set); Session.save (user); Tx.commit (); Session.close ();}

　　

Set Set mappings in Hibernate