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This article will explain in detail how jpa uses @Column to define field types. Xiaobian thinks it is quite practical, so share it with you as a reference. I hope you can gain something after reading this article.

jpa @Column defines the field type

columnDefinition is really more versatile, not easy to define or do not have this attribute can be defined directly with columnDefinition according to ddl, field comments can also be defined.

Code:

@Data@Entitypublic class ColumnDemo { @Id private Long id; @Column(name="name",nullable = false) //Name cannot be null, but can be repeated private String name; @Column(name="mobile",unique = true) private String mobile; //mobile number cannot be duplicate @Column(name="address",length = 512) private String address; //address length 512 private Date datetime; @Column(name = "date", columnDefinition = "date") private Date date; //Month @Column(name = "time", columnDefinition = "time") private Date time; //hour minute @Column(name = "salary", precision = 5,scale = 3)// @Column(name = "salary", columnDefinition = "decimal(10,2)") private BigDecimal salary; @Column(name = "remark",columnDefinition="text") private String remark;@Column (name="del_flag",columnDefinition = "varchar(255) comment 'delete flag0: not deleted1: deleted") private String delFlag;}jpa Set field type to TEXT type with comment @Lob@Column (columnDefinition="TEXT")public String getImgUrls() {return imgUrls;}public void setImgUrls (String imgUrls) {this.imgUrls = imgUrls;} About "jpa how to use @Column to define field types" This article is shared here, I hope the above content can be of some help to everyone, so that you can learn more knowledge, if you think the article is good, please share it for more people to see.

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