java - How to join fields of two tables using Hibernate? -

i have 2 tables , related java mapping.

create table country (     code varchar(3) primary key not null,     name varchar(100) not null );   create table user (     id int primary key not null auto_increment,     name varchar(100) not null,     country_code varchar(3),     foreign key ( country_code ) references country ( code ) ); 

here java entities. country pojo:

@entity @table(name = "country") public class country {      @id     @column (name = "code")     private string code;      @column (name = "name")     private string name; 

and user pojo:

@entity @table(name = "user") public class user implements serializable {      @id     @generatedvalue(strategy = generationtype.auto)     private integer id;      @column(name = "name")     private string name;      @column(name = "country_code")     private string countrycode; 

question how can join contry.code user.countrycode in hibernate using annotation? when create user object hibernate need bind these 2 fields (code , countrycode) automatically.

you need @onetomany mapping country user entity , corresponding @manytoone mapping user country:

@entity @table(name = "country") public class country {      @id     @column (name = "code")     private string code;      @column (name = "name")     private string name;      @onetomany(mappedby = "country")     private set<user> users; }  @entity @table(name = "user") public class user implements serializable {      @id     @generatedvalue(strategy = generationtype.auto)     private integer id;      @column(name = "name")     private string name;      @manytoone     @joincolumn(name = "country_code")     private country country; }