springdata jpa 定義一個BaseEntity

在開發中我們可以定義個BaseEntity，比如創建時間，修改時間等，不用每個實體都寫上

• 定義BaseEntity,打上@MappedSuperclass註解，不用@Entity、@Table等註解

   @MappedSuperclass
    public class BaseEntity {
        /**
         * 主鍵id
         */
        @ApiModelProperty(value = "主鍵id")
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Long id;
    
        public Long getId() {
            return id;
        }
    
        public void setId(Long id) {
            this.id = id;
        }
    }
  
  

• 定義一個實體, 繼承BaseEntity

    @Entity
    @Table(name = "pmi_t_test")
    @org.hibernate.annotations.Table(appliesTo = "pmi_t_test",comment="test")
    public class TestEntity extends BaseEntity{
        /**
         * 用戶名
         */
        @ApiModelProperty(value = "用戶名", required = true)
        @NotBlank(message = "用戶名不能爲空")
        @Column(name = "user_name", nullable = false,columnDefinition="varchar(100) COMMENT '用戶名'")
        private String userName;
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName;
        }
    }
  

• 運行項目，自動創建表