JPA和Hibernate：ERROR 10844 无法确定类型为：java.util.Set的列publishers在表book中。

加入了带有注释@manytoone的Publisher后，它就可以正常工作了。\nBook.java的代码\n

package com.example.TDSSpringTest.domain;
import javax.persistence.*;
import java.util.HashSet;
import java.util.Set;
@Entity
public class Book {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String title;
    private  String isbn;
    @ManyToOne
    private Publisher publisher;
    @ManyToMany
    @JoinTable(name = "author_book", joinColumns = @JoinColumn(name = "book_id"),
         inverseJoinColumns = @JoinColumn(name = "author_id"))
    private Set authors = new HashSet<>();
    private Set publishers = new HashSet<>();
    public Book (){
    }
    public Set getPublishers() {
        return publishers;
    }
    public void setPublishers(Set publishers) {
        this.publishers = publishers;
    }
    public Book(String title, String isbn) {
        this.title = title;
        this.isbn = isbn;
    }
    public Publisher getPublisher() {
        return publisher;
    }
    public void setPublisher(Publisher publisher) {
        this.publisher = publisher;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getIsbn() {
        return isbn;
    }
    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }
    public Set getAuthors() {
        return authors;
    }
    public void setAuthors(Set authors) {
        this.authors = authors;
    }
    @Override
    public String toString() {
        return "Book{" +
                "id=" + id +
                ", title='" + title + '\'' +
                ", isbn='" + isbn + '\'' +
                ", authors=" + authors +
                '}';
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Book book = (Book) o;
        return id != null ? id.equals(book.id) : book.id == null;
    }
    @Override
    public int hashCode() {
        return id != null ? id.hashCode() : 0;
    }
}

\nPublisher.java的代码\n

package com.example.TDSSpringTest.domain;
import javax.persistence.*;
import java.util.HashSet;
import java.util.Set;
@Entity
public class Publisher {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;
    private String adressLine1;
    private String city;
    private String state;
    private String zip;
    @OneToMany
    @JoinColumn(name = "publisher_id")
    private Set books = new HashSet<>();
    public Publisher(){
    }
    @Override
    public String toString() {
        return "Publisher{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", adressLine1='" + adressLine1 + '\'' +
                ", city='" + city + '\'' +
                ", state='" + state + '\'' +
                ", zip='" + zip + '\'' +
                '}';
    }
    public Set getBooks() {
        return books;
    }
    public void setBooks(Set books) {
        this.books = books;
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Publisher publisher = (Publisher) o;
        return id != null ? id.equals(publisher.id) : publisher.id == null;
    }
    @Override
    public int hashCode() {
        return id != null ? id.hashCode() : 0;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAdressLine1() {
        return adressLine1;
    }
    public void setAdressLine1(String adressLine1) {
        this.adressLine1 = adressLine1;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public String getState() {
        return state;
    }
    public void setState(String state) {
        this.state = state;
    }
    public String getZip() {
        return zip;
    }
    public void setZip(String zip) {
        this.zip = zip;
    }
}

\n错误：\n2021-09-03 11:34:21.454 ERROR 10844--- [ main] o.s.boot.SpringApplication : 应用程序运行失败\norg.springframework.beans.factory.BeanCreationException: 在类路径资源[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]中定义的名为\'entityManagerFactory\'的bean创建失败: 初始化方法的调用失败; 嵌套异常是javax.persistence.PersistenceException: [PersistenceUnit: default] 无法构建Hibernate SessionFactory; 嵌套异常是org.hibernate.MappingException: 无法确定类型: java.util.Set，对应表: book，列: [org.hibernate.mapping.Column(publishers)]。