小编use*_*822的帖子

我有两张桌子，有很多关系。产品（ID，说明，价格，图像）---->产品类别（ID产品，类别ID）---->类别（ID，类别名称）。

这是我的特长：

1.产品

@Entity
@Table(name = "products")
public class Products implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "idProducts")
    private long id;

    @Column(name = "description")
    private String description;

    @Column(name = "price")
    private String price;

    @Column(name = "image")
    private byte [] image;

    public Products() {
    }

    public Products(String description, String price, byte[] image) {}


    @ManyToMany
    @JoinTable(
       name = "category_products",
            joinColumns ={@JoinColumn (name = "Products_idProducts", referencedColumnName = "idProducts")},
            inverseJoinColumns = {@JoinColumn(name = "category_id", referencedColumnName = "id")}
    )
        List<Category> categories = new …