@Entity

public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String productName;
    private int year;
    private Double price;
    private String url;

    public  Product() { }
     public Product(String productName, int year, Double price, String url) {
         this.productName = productName;
         this.year = year;
         this.price = price;
         this.url = url;
     }
}

我的Springboot有问题。即使我添加了@Id，日志也告诉我产品没有任何ID。