Spring Data JPA自定义Id生成策略、复合主键配置、Auditing使用

import org.springframework.data.annotation.CreatedBy;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedBy;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;
import javax.persistence.*;
import java.io.Serializable;
import java.util.Date;
 
@Entity
@Table(name = "customers")
@EntityListeners(AuditingEntityListener.class)
public class Customer implements Serializable {
 
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
 
    @Column(name = "first_name")
    private String firstName;
 
    @Column(name = "last_name")
    private String lastName;
 
    @CreatedBy
    @Column(name = "created_by")
    private String createdBy;
 
    @CreatedDate
    @Column(name = "created_date")
    private Date createdDate;
 
    @LastModifiedBy
    @Column(name = "last_modified_by")
    private String lastModifiedBy;
 
    @LastModifiedDate
    @Column(name = "last_modified_date")
    private Date lastModifiedDate;
 
    // 省略getter和setter方法
}
 
@Embeddable
public class CompoundKey implements Serializable {
    private String keyPart1;
    private String keyPart2;
 
    // 省略getter和setter方法
}
 
@Entity
@Table(name = "compound_key_entities")
public class CompoundKeyEntity {
 
    @EmbeddedId
    private CompoundKey id;
 
    @Column(name = "data")
    private String data;
 
    // 省略getter和setter方法
}

这个代码示例展示了如何在Spring Data JPA中使用自定义的ID生成策略、复合主键配置以及Auditing的使用。在Customer实体中，我们使用了@GeneratedValue注解来指定ID的生成策略，并且通过@EntityListeners(AuditingEntityListener.class)开启了Auditing功能。CompoundKey是一个复合主键类，使用@Embeddable注解标记，而CompoundKeyEntity则通过@EmbeddedId注解来使用这个复合主键。