以下是三个实体类:卖家,买家,产品
package com.example.demo.entity; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class Buyer { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String username; private String password; private String nickname; // getters and setters }
package com.example.demo.entity; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class Product { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String name; private String description; private double price; // getters and setters }
package com.example.demo.entity; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class Seller { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String username; private String password; private String nickname; // getters and setters }