Spring Boot 2.0.3 Spring data jpaを統合し、添削の機能を実現しました.

Spring Bootのフレームワークの構築はもちろん、記事が多く、jpaはOneToOne、OneToMany、ManyToOne、ManyTonyの配置をサポートしています.開発上はかなり効率的です.
以下では、jpaとjava 1.8の関数を組み合わせたプログラミング思想を紹介します.
1.まずはBaseRepositoryを作成します.

@NoRepositoryBean
public interface BaseRepository extends Repository {

	Optional findOne(ID id);
	
	 S save(S entity);

	Optional findById(ID primaryKey);

	Iterable findAll();

	long count();

	void delete(T entity);

	boolean existsById(ID primaryKey);
}

2、実体類の作成

@Entity(name = "Student")   
public class Student implements Serializable{    
	private static final long serialVersionUID = 5537592547914489373L;	
	@Id  
    @GeneratedValue  
    private Integer id;
    private String name; 
    private Integer age;  
    private String sex;  
    private String phone; 
    private String address;

3,DAO層を作成する

public interface StudentRepository extends BaseRepository{

	List> findByNameLike(String surname);

	List> findAll(Specification specification);

	Optional findOne(Integer id);

	Optional findByName(String name);

	@Query("SELECT id,address,age,classNo,name,phoneNum,sex FROM Student ")
	Stream> streamAllStudents();

	@Async
	CompletableFuture> readAllBy();
	
}

4,サービス層

@Service
public class StudentService {

	@Autowired
	private StudentRepository studentRepository;

	public List> findAll() {
		return studentRepository.findAll(null);
	}

	public Student getStudent(int id) {
		Optional findOne = studentRepository.findOne(id);
		Student student = findOne.get();
		return student;
	}

	@Transactional
	public List> streamAllStudents() {
		List> studentList;
		try (Stream> customers = studentRepository.streamAllStudents()) {
			studentList = customers.collect(Collectors.toList());
		}
		return studentList;
	}

	public List> readAllBy() throws InterruptedException, ExecutionException {
		CompletableFuture> future = studentRepository.readAllBy();
		CompletableFuture.supplyAsync(this::streamAllStudents);
		return future.get();
	}

}

5,WEB層

@RestController
@RequestMapping("/springboot_jpa")
public class StudentWeb {

	@Autowired
	private StudentService studentService;

	//        
	@RequestMapping("/student/findAll")
	public List> findAll() {
		return studentService.findAll();
	}

	@RequestMapping("/student/jdk8text")
	private Student getOne() {
		Student student = studentService.getStudent(1);
		return student;
	}

	/**
	 *           
	 * 
	 * @return
	 * @Description:
	 * @author Bern_Liu
	 * @version     ：2018 6 22    2:09:18
	 */
	@RequestMapping("/student/getListStudent")
	private List> getListStudent() {
		List> totalStudent = studentService.streamAllStudents();
		return totalStudent;
	}

	/**
	 *     JSON   name:xxx
	 * 
	 * @return
	 * @Description:
	 * @author Bern_Liu
	 * @version     ：2018 6 22    2:09:18
	 */
	@RequestMapping("/student/readAllBy")
	private List> readAllBy() throws InterruptedException, ExecutionException {
		return studentService.readAllBy();
	}