Onetomany

package com.trifulcas.models;

import java.util.Date;
import java.util.List;

import jakarta.persistence.CascadeType;
import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.OneToMany;
import jakarta.persistence.Table;
import jakarta.persistence.Temporal;
import jakarta.persistence.TemporalType;

@Entity
@Table(name = "city")
public class City {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Column(name = "city_id")
	private Short cityId;

	@Column(name = "city", nullable = false)
	private String city;

	// En la entidad de 'varios' ponemos ManyToOne
	@ManyToOne
	// Especificamos cual es la clave foránea de esta relación
	@JoinColumn(name = "country_id", nullable = false)
	// La propiedad siempre será la entidad relacionada
	private Country country; // Cuando recuperamos la entidad se cargan automáticamente las entidades relacionadas
	// Es decir, cuando yo cargo una ciudad se carga su país
	// Y puedo acceder a sus valores

	@OneToMany(mappedBy="city",cascade=CascadeType.ALL)
	private List<Address> addreses;
	
	@Column(name = "last_update", nullable = false, columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
	@Temporal(TemporalType.TIMESTAMP)
	private java.util.Date lastUpdate = new Date();

	// Constructor, getters, and setters

	public City() {
	}

	public City(String city, Country country) {
		this.city = city;
		this.country = country;
	}

	public Short getCityId() {
		return cityId;
	}

	public void setCityId(Short cityId) {
		this.cityId = cityId;
	}

	public String getCity() {
		return city;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public Country getCountry() {
		return country;
	}

	public void setCountry(Country country) {
		this.country = country;
	}

	public java.util.Date getLastUpdate() {
		return lastUpdate;
	}

	public void setLastUpdate(java.util.Date lastUpdate) {
		this.lastUpdate = lastUpdate;
	}

	public List<Address> getAddreses() {
		return addreses;
	}

	public void setAddreses(List<Address> addreses) {
		this.addreses = addreses;
	}

	// Cuidado con poner country porque entramos en bucle
	@Override
	public String toString() {
		return "City [cityId=" + cityId + ", city=" + city + ", country="+country.getCountry()+"]";
	}

}

package com.trifulcas.models;

import java.sql.Timestamp;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.Table;

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

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "address_id")
    private short addressId;

    @Column(name = "address", nullable = false, length = 50)
    private String address;

    @Column(name = "address2", length = 50)
    private String address2;

    @Column(name = "district", nullable = false, length = 20)
    private String district;

    @ManyToOne
    @JoinColumn(name="city_id")
    private City city;
   
   

	@Column(name = "postal_code", length = 10)
    private String postalCode;

    @Column(name = "phone", nullable = false, length = 20)
    private String phone;

    @Column(name = "last_update", nullable = false, columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
    private Timestamp lastUpdate;

    // Getters and Setters

    public short getAddressId() {
        return addressId;
    }

    public void setAddressId(short addressId) {
        this.addressId = addressId;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getAddress2() {
        return address2;
    }

    public void setAddress2(String address2) {
        this.address2 = address2;
    }

    public String getDistrict() {
        return district;
    }

    public void setDistrict(String district) {
        this.district = district;
    }
    public City getCity() {
		return city;
	}

	public void setCity(City city) {
		this.city = city;
	}

    public String getPostalCode() {
        return postalCode;
    }

    public void setPostalCode(String postalCode) {
        this.postalCode = postalCode;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public Timestamp getLastUpdate() {
        return lastUpdate;
    }

    public void setLastUpdate(Timestamp lastUpdate) {
        this.lastUpdate = lastUpdate;
    }

	@Override
	public String toString() {
		return "Address [addressId=" + addressId + ", address=" + address + ", address2=" + address2 + ", district="
				+ district + ", city=" + city + ", postalCode=" + postalCode + ", phone=" + phone + ", lastUpdate="
				+ lastUpdate + "]";
	}
    
}

No olvideis anotar en HibernateUtil:

...
		configuration.addAnnotatedClass(Address.class);
...