@Repository
public interface UserRepository extends JpaRepository<User, Long> {Optional<User> findOneByActivationKey(String activationKey);List<User> findAllByActivatedIsFalseAndCreatedDateBefore(Instant dateTime);Optional<User> findOneByResetKey(String resetKey);Optional<User> findOneByEmailIgnoreCase(String email);Optional<User> findOneByLogin(String login);@EntityGraph(attributePaths = "authorities")Optional<User> findOneWithAuthoritiesById(Long id);@EntityGraph(attributePaths = "authorities")Optional<User> findOneWithAuthoritiesByLogin(String login);@EntityGraph(attributePaths = "authorities")Optional<User> findOneWithAuthoritiesByEmail(String email);Page<User> findAllByLoginNot(Pageable pageable, String login);
}

@Entity
@Table(name = "user")
public class User implements Serializable {private static final long serialVersionUID = 1L;@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Long id;@NotNull@Pattern(regexp = Constants.LOGIN_REGEX)@Size(min = 1, max = 50)@Column(length = 50, unique = true, nullable = false)private String login;@JsonIgnore@NotNull@Size(min = 60, max = 60)@Column(name = "password_hash", length = 60, nullable = false)private String password;@Email@Size(min = 5, max = 254)@Column(length = 254, unique = true)private String email;@NotNull@Column(nullable = false)private boolean activated = false;@Column(name = "reset_date")private Instant resetDate = null;@JsonIgnore@ManyToMany@JoinTable(name = "jhi_user_authority",joinColumns = {@JoinColumn(name = "user_id", referencedColumnName = "id")},inverseJoinColumns = {@JoinColumn(name = "authority_name", referencedColumnName = "name")})@BatchSize(size = 20)private Set<Authority> authorities = new HashSet<>();//...
}

@Entity
@Table(name = "jhi_authority")
public class Authority implements Serializable {private static final long serialVersionUID = 1L;@NotNull@Size(max = 50)@Id@Column(length = 50)private String name;
}

        <dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-elasticsearch</artifactId></dependency>

spring:    data:elasticsearch:cluster-nodes: localhost:9300

@Document(indexName = "user", type = "doc")
public class User {//这里的instant jackson无法直接从string转换为instant，需要编写个编解码类@JsonSerialize(using = InstantJacksonSerializer.class)@JsonDeserialize(using = InstantJacksonDeserialize.class)private Instant createdDate;private String createdBy;private boolean activated;//原项目Id，是使用Long类型，这里不改，但elasticsearch的话推荐使用String作为Id，因为自动创建id的时候为随机字符串@Idprivate Long id;private Set<Authority> authorities;private String login;private String email;//...
}

public interface UserRepository extends ElasticsearchRepository<User, Long> {Optional<User> findOneByActivationKey(String activationKey);List<User> findAllByActivatedIsFalseAndCreatedDateBefore(Instant dateTime);Optional<User> findOneByResetKey(String resetKey);Optional<User> findOneByEmailIgnoreCase(String email);Optional<User> findOneByLogin(String login);Optional<User> findOneByEmail(String email);Page<User> findAllByLoginNot(Pageable pageable, String login);}

        @Query("{"bool" : {"must" : {"field" : {"name" : "?0"}}}}")Page<Book> findByName(String name,Pageable pageable);

    //MYSQL@Size(max = 50)@Column(name = "first_name", length = 50)private String firstName;//Elasticsearchprivate String firstName;