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私はClientとMovieという2つのクラスを持っています。私はクライアントの外来キーと本の外字キーを保持するクラスRentedMovieを持っていたいと思います。また、独自のIDも持っています。これまでのところ私のクラスには同じように見える：1つのマッピングクラス内の複数の外部キーHibernate + JPA + Spring
クライアント：
@Entity
@Table(name="Client")
public class Client implements Serializable {
@Id
@Column(name="id", nullable= false)
private Integer id;
@Column(name="age", nullable = false)
private Integer age;
@Column(name="numberofrentals", nullable = false)
private Integer numberofrentals;
@Column(name="name", nullable = false)
private String name;
@Column(name="address", nullable = false)
private String address;
public Client() {
}
public Client(Integer id, Integer age, Integer numberofrentals, String name, String address) {
this.id = id;
this.age = age;
this.numberofrentals = numberofrentals;
this.name = name;
this.address = address;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Integer getnumberofrentals() {
return numberofrentals;
}
public void setnumberofrentals(int numberofrentals) {
this.numberofrentals = numberofrentals;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Client client = (Client) o;
if (age != client.age) return false;
if (numberofrentals != client.numberofrentals) return false;
if (!id.equals(client.id)) return false;
if (!name.equals(client.name)) return false;
return address.equals(client.address);
}
@Override
public int hashCode() {
int result = id.hashCode();
result = 31 * result + age;
result = 31 * result + numberofrentals;
result = 31 * result + name.hashCode();
result = 31 * result + address.hashCode();
return result;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Client{" +
"id=" + id +
", age=" + age +
", numberofrentals=" + numberofrentals +
", name='" + name + '\'' +
", address='" + address + '\'' +
'}';
}
}
映画：
@Entity
@Table(name="movie")
public class Movie implements Serializable {
@Id
@Column(name="id", nullable=false)
private Integer id;
@Column(name="name", nullable = false)
private String name;
@Column(name="numberofrentals", nullable=false)
private Integer numberofrentals;
@Column(name="director", nullable = false)
private String director;
@Column(name="year", nullable = false)
private Integer year;
public Movie() {
}
public Movie(Integer id, String name, Integer numberofrentals, String director, Integer year) {
this.id = id;
this.name = name;
this.numberofrentals = numberofrentals;
this.director = director;
this.year = year;
}
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 String getDirector() {
return director;
}
public void setDirector(String director) {
this.director = director;
}
public Integer getYear() {
return year;
}
public void setYear(Integer year) {
this.year = year;
}
public Integer getNumberofrentals() {
return numberofrentals;
}
public void setNumberofrentals(Integer numberofrentals) {
this.numberofrentals = numberofrentals;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Movie movie = (Movie) o;
if (!id.equals(movie.id)) return false;
if (!name.equals(movie.name)) return false;
if (!numberofrentals.equals(movie.numberofrentals)) return false;
if (!director.equals(movie.director)) return false;
return year.equals(movie.year);
}
@Override
public int hashCode() {
int result = id.hashCode();
result = 31 * result + name.hashCode();
result = 31 * result + numberofrentals.hashCode();
result = 31 * result + director.hashCode();
result = 31 * result + year.hashCode();
return result;
}
@Override
public String toString() {
return "Movie{" +
"id=" + id +
", name='" + name + '\'' +
", numberofrentals=" + numberofrentals +
", director='" + director + '\'' +
", year=" + year +
'}';
}
}
そして今、正常jsutで借りクラス：何
@Entity
@Table(name="rented")
public class Rented implements Serializable {
@Id
@Column(name="id", nullable= false)
private Integer id;
@Column(name="movieID", nullable = false)
private Integer movieID;
@Column(name="clientID", nullable = false)
private Integer clientID;
public Rented(Integer id, Integer movieID, Integer clientID) {
this.id = id;
this.movieID = movieID;
this.clientID = clientID;
}
public Rented() {
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getMovieID() {
return movieID;
}
public void setMovieID(Integer movieID) {
this.movieID = movieID;
}
public Integer getClientID() {
return clientID;
}
public void setClientID(Integer clientID) {
this.clientID = clientID;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Rented rented = (Rented) o;
if (!id.equals(rented.id)) return false;
if (!movieID.equals(rented.movieID)) return false;
return clientID.equals(rented.clientID);
}
@Override
public int hashCode() {
int result = id.hashCode();
result = 31 * result + movieID.hashCode();
result = 31 * result + clientID.hashCode();
return result;
}
@Override
public String toString() {
return "Rented{" +
"id=" + id +
", movieID=" + movieID +
", clientID=" + clientID +
'}';
}
}
私は本当に変更する必要がありますか？私はレンタルクラスに映画とクライアントを提供する必要がありますか？クライアントと本の間には、1対1の関係があります。書籍は一度だけ借りることができ、クライアントは複数の書籍を借りることができます。リストをどこかに保管しなければならないのですか？あるいは、賃貸されたクラスはどのように見えるのでしょうか。
？ –
嫌いですか？どういう意味ですか？ – Mocktheduck
_クライアントとムービーと呼ばれる2つのクラスが嫌いです –