How to autogenerate created or modified timestamp field?

Question

My entity class:

@Entity
@Table(name = \"user\")
public class User implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
           


        

Answer 1

You can just create a new Date() whenever your instance is created, and then update the updated field whenever the entity gets updated:

private Date created = new Date();
private Date updated = new Date();

@PreUpdate
public void setLastUpdate() {  this.updated = new Date(); }

Don't provide a setter for any of these methods, only getters.