Note: "Hibernate bidirectional 1->n association with connected tables"

Person associated with address: bidirectional 1->n, "Connected table", N-terminal control correlation

Person.java

Package org.crazyit.app.domain;

Import Java.util.HashSet;
Import Java.util.Set;

Import Javax.persistence.Column;
Import javax.persistence.Entity;
Import Javax.persistence.GeneratedValue;
Import Javax.persistence.GenerationType;
Import Javax.persistence.Id;
Import Javax.persistence.OneToMany;
Import javax.persistence.Table;

@Entity
@Table (name = "Person_inf")
public class Person {

@Column (name = "person_id")
@Id
@GeneratedValue (strategy = generationtype.identity)
Private Integer ID;

private String name;

Private Integer age;

Two-way 1->n:1 to N correlation relation
Define all the associated address for the person entity
@OneToMany (targetentity = address.class,//
Mappedby = "person")//Specifies the Mappedby attribute, indicating that the person entity does not control the association relationship.
Private set<address> addresses = new hashset<address> ();

Public Integer getId () {
return ID;
}

public void SetId (Integer id) {
This.id = ID;
}

Public String GetName () {
return name;
}

public void SetName (String name) {
THIS.name = name;
}

Public set<address> getaddresses () {
return addresses;
}

public void setaddresses (set<address> addresses) {
This.addresses = addresses;
}

Public Integer Getage () {
return age;
}

public void Setage (Integer age) {
This.age = age;
}

}

Address.java

Package org.crazyit.app.domain;

Import Javax.persistence.Column;
Import javax.persistence.Entity;
Import Javax.persistence.GeneratedValue;
Import Javax.persistence.GenerationType;
Import Javax.persistence.Id;
Import Javax.persistence.JoinColumn;
Import javax.persistence.JoinTable;
Import Javax.persistence.ManyToOne;
Import javax.persistence.Table;

@Entity
@Table (name = "Address_inf")
public class Address {

@Id
@Column (name = "address_id")
@GeneratedValue (strategy = generationtype.identity)
Private Integer ID;

Define the person entity associated with the address entity
@ManyToOne (targetentity = person.class)
@JoinTable (name = "Person_address",//Specify the connection table name
Specifies the ADDRESS_ID primary key column for the address_id column reference of the current entity's corresponding data table in the Join table
Joincolumns = @JoinColumn (name = "address_id",//
Referencedcolumnname = "address_id",//
Unique = True),//Add uniqueness Constraint (unique) To ensure address only corresponds to one person entity
The person_id column in the direct join table references the PERSON_ID primary key column of the corresponding data list for the current Entity Association entity
Inversejoincolumns = @JoinColumn (name = "person_id",//
Referencedcolumnname = "person_id")//
)
private person person;

Address details
Private String Addressdetail;

Non-parametric construction method
Public Address () {
}

Initialize all member variables
Public Address (String addressdetail) {
This.addressdetail = Addressdetail;
}

Public Integer getId () {
return ID;
}

public void SetId (Integer id) {
This.id = ID;
}

Public String Getaddressdetail () {
return addressdetail;
}

public void Setaddressdetail (String addressdetail) {
This.addressdetail = Addressdetail;
}

Public Person Getperson () {
return person;
}

public void Setperson (person person) {
This.person = person;
}

}

#数据模型

Note: "Hibernate bidirectional 1->n association with connected tables"