在Java中，Pageable接口通常用于處理分頁數據

1. 創建一個實體類（Entity）：

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String email;
    // Getters and Setters, Constructors
}

2. 創建一個Repository接口，繼承JpaRepository和JpaSpecificationExecutor：

public interface UserRepository extends JpaRepository<User, Long>, JpaSpecificationExecutor<User> {
}

3. 創建一個Service類，用于處理業務邏輯：

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public Page<User> findAllUsers(Pageable pageable) {
        return userRepository.findAll(pageable);
    }

    public Page<User> findUsersByName(String name, Pageable pageable) {
        Specification<User> specification = (root, query, criteriaBuilder) ->
                criteriaBuilder.equal(root.get("name"), name);
        return userRepository.findAll(specification, pageable);
    }
}

4. 創建一個Controller類，用于處理HTTP請求：

@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping
    public ResponseEntity<Page<User>> getAllUsers(
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "10") int size) {
        Pageable pageable = PageRequest.of(page, size);
        Page<User> users = userService.findAllUsers(pageable);
        return ResponseEntity.ok(users);
    }

    @GetMapping("/search")
    public ResponseEntity<Page<User>> searchUsersByName(
            @RequestParam String name,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "10") int size) {
        Pageable pageable = PageRequest.of(page, size);
        Page<User> users = userService.findUsersByName(name, pageable);
        return ResponseEntity.ok(users);
    }
}

在這個例子中，我們創建了一個簡單的用戶管理系統，包括實體類、Repository接口、Service類和Controller類。我們使用Pageable接口處理分頁數據，并通過PageRequest.of()方法創建Pageable對象。在Controller類中，我們使用@RequestParam注解獲取分頁參數，并將其傳遞給Service方法。這是一個典型的Java分頁實踐案例。