表person对应的model类：

@Entity
@Table(name = "person")
public class Person {
    @Id
    @GeneratedValue
    private Long id;
    private Integer age;
    private String name;
    @Column(name = "nick_name")
    private String nickName;
    private String company;
    private Date birthday;
    
    // getter and setter
}

数据库访问PersonRepository类：

public interface PersonRepository extends JpaRepository<Person, Long>, JpaSpecificationExecutor<Person> {
}

查询名字包含"ac"或"ri"的人。

public List<Person> findAll(SearchRequest request) {
    Specification<Person> specification = new Specifications<Person>()
            .like(isNotBlank(request.getName()), "name", "%ac%", "%ri%")
            .build();

    return personRepository.findAll(specification); 
}