构建师生网上办事大厅：后端与源码解析

@RestController

@RequestMapping("/api")

public class ApplicationController {

@Autowired

private ApplicationService applicationService;

// 提交申请接口

@PostMapping("/submit")

public ResponseEntity submitApplication(@RequestBody ApplicationDTO dto) {

boolean success = applicationService.submit(dto);

return success ? ResponseEntity.ok("申请提交成功！")

: ResponseEntity.status(HttpStatus.BAD_REQUEST).body("提交失败，请检查信息！");

}

// 查询申请状态

@GetMapping("/status/{id}")

public ResponseEntity getStatus(@PathVariable Long id) {

ApplicationStatus status = applicationService.getStatus(id);

return ResponseEntity.ok(status);

}

}

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@Service

public class ApplicationService {

@Autowired

private ApplicationRepository repository;

public boolean submit(ApplicationDTO dto) {

try {

ApplicationEntity entity = new ApplicationEntity();

entity.setUserId(dto.getUserId());

entity.setApplicationType(dto.getType());

entity.setStatus("PENDING");

repository.save(entity);

return true;

} catch (Exception e) {

return false;

}

}

public ApplicationStatus getStatus(Long id) {

Optional optional = repository.findById(id);

if (optional.isPresent()) {

ApplicationEntity entity = optional.get();

return new ApplicationStatus(entity.getStatus(), entity.getUpdatedAt());

}

return null;

}

}

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