Spring Data分页与排序的实现方法

@Repository
public interface PersonRepositary extends PagingAndSortingRepository<Person, Long>,QueryDslPredicateExecutor<Person> {

 @Query("select p from Person p where p.country like ?1 order by country")
 List<Person> findByCountryContains(String country);

 List<Person> findPersonByHobbyName(String name);

 @Query("select p from Person p where p.id = ?1 and country='America'")
 Person findOne(Long id);
}

@Entity
public class Person {
 @Id
 @GeneratedValue(strategy=GenerationType.AUTO)
 private Long id;
 private String name;
 private String country;
 private String gender;
@OneToMany(mappedBy="person",targetEntity=Hobby.class,
  fetch=FetchType.EAGER,cascade=CascadeType.ALL)
  List<Hobby> hobby;
public String getName() {
 return name;
}
public void setName(String name) {
 this.name = name;
}
public String getCountry() {
 return country;
}
public void setCountry(String country) {
 this.country = country;
}
public String getGender() {
 return gender;
}
public void setGender(String gender) {
 this.gender = gender;
}
public Long getId() {
 return id;
}
public void setId(Long id) {
 this.id = id;
}
public List<Hobby> getHobby() {
 return hobby;
}
public void setHobby(List<Hobby> hobby) {
 this.hobby = hobby;
}
public void addHobby(Hobby ihobby)
{
 if(hobby == null)
 {
  hobby = new ArrayList<Hobby>();
 }
 hobby.add(ihobby);
}
 @Override
 public String toString() {
  return "Person [id=" + id + ", name=" + name + ", country=" + country + ", gender=" + gender + "]";
 }
}

@SpringBootApplication
@EnableJpaRepositories("com.example.repo")
public class PersonApplication {
 @Autowired
 HobbyRepository hRepo;

 private static final Logger log = LoggerFactory.getLogger(PersonApplication.class);

 @Bean
 public CommandLineRunner demo(PersonRepositary repository) {
  findAll(repository);
  return null;
 }

 private PageRequest gotoPage(int page)
 {
  PageRequest request = new PageRequest(page,1)
  return request;
 }

 private void findAll(PersonRepositary repository)
 {
  Iterable<Person> pList = repository.findAll(gotoPage(0));
  for(Person p : pList)
   log.info("Person " + p);
 }

 public static void main(String[] args) {
  SpringApplication.run(PersonApplication.class, args);
 }
}

private PageRequest gotoPage(int page)
{
 PageRequest request = new PageRequest(page,1,Sort.Direction.ASC,"country");
 return request;
}