基于springboot的养老院管理系统活动报名代码示例

以下是一个基于Spring Boot的养老院管理系统活动报名的代码示例：

ActivityController.java

@RestController
@RequestMapping("/activity")
public class ActivityController {

@Autowired
private ActivityService activityService;

// 获取所有活动
@GetMapping("/")
public List<Activity> getAllActivities() {
return activityService.getAllActivities();
}

// 获取指定 id 的活动
@GetMapping("/{id}")
public Activity getActivityById(@PathVariable Long id) {
return activityService.getActivityById(id);
}

// 创建活动
@PostMapping("/")
public Activity createActivity(@RequestBody Activity activity) {
return activityService.createActivity(activity);
}

// 报名活动
@PostMapping("/{id}/enroll")
public void enrollActivity(@PathVariable Long id, @RequestBody EnrollInfo enrollInfo) {
activityService.enrollActivity(id, enrollInfo);
}
}
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Activity.java

@Entity
@Table(name = "activity")
public class Activity {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@Column(name = "name")
private String name;

@Column(name = "description")
private String description;

@Column(name = "start_time")
private LocalDateTime startTime;

@Column(name = "end_time")
private LocalDateTime endTime;

@Column(name = "max_enroll")
private Integer maxEnroll;

@OneToMany(mappedBy = "activity", cascade = CascadeType.ALL, orphanRemoval = true)
private List<Enrollment> enrollments = new ArrayList<>();

// getters and setters
}
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Enrollment.java

@Entity
@Table(name = "enrollment")
public class Enrollment {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@ManyToOne
@JoinColumn(name = "activity_id")
private Activity activity;

@Column(name = "name")
private String name;

@Column(name = "phone")
private String phone;

// getters and setters
}
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ActivityService.java

@Service
public class ActivityService {

@Autowired
private ActivityRepository activityRepository;

// 获取所有活动
public List<Activity> getAllActivities() {
return activityRepository.findAll();
}

// 获取指定 id 的活动
public Activity getActivityById(Long id) {
return activityRepository.findById(id).orElseThrow(() -> new RuntimeException("Activity not found"));
}

// 创建活动
public Activity createActivity(Activity activity) {
return activityRepository.save(activity);
}

// 报名活动
public void enrollActivity(Long id, EnrollInfo enrollInfo) {
Activity activity = getActivityById(id);
if (activity.getEnrollments().size() >= activity.getMaxEnroll()) {
throw new RuntimeException("Activity is full");
}
Enrollment enrollment = new Enrollment();
enrollment.setName(enrollInfo.getName());
enrollment.setPhone(enrollInfo.getPhone());
enrollment.setActivity(activity);
activity.getEnrollments().add(enrollment);
activityRepository.save(activity);
}
}
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EnrollInfo.java

public class EnrollInfo {

private String name;

private String phone;

// getters and setters
}
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ActivityRepository.java

public interface ActivityRepository extends JpaRepository<Activity, Long> {
}
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这个示例中，我们定义了一个 Activity 实体类，它有一个名为 enrollments 的属性，表示已报名的人数，同时它也是一个 JPA 实体类，被映射到数据库中。我们还定义了一个 Enrollment 实体类，它表示一次报名，也是一个 JPA 实体类。在 ActivityService 类中，我们定义了报名活动的方法，并且使用了 JPA 的级联和孤儿删除特性，确保了报名信息和活动信息的一致性。最后，我们在 ActivityController 中定义了活动的 RESTful 接口，包括获取所有活动、获取指定 id 的活动、创建活动和报名活动。