閲嶉�夊埌寮傝浇棰戦珮浼樺厛绾х殑RSRP楂橀棬闄�

ckage com.example.demo.service; import com.example.demo.model.Department; import com.example.demo.model.Employee; import com.example.demo.repository.DepartmentRepository; import com.example.demo.repository.EmployeeRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class DepartmentService { @Autowired DepartmentRepository departmentRepository; public List getAllDepartments() { return departmentRepository.findAll(); } public Department addDepartment(Department department) { return departmentRepository.save(department); } public Department getDepartmentById(Long id) { return departmentRepository.findById(id).orElse(null); } public Department updateDepartment(Department department) { Department existingDepartment = departmentRepository.findById(department.getId()).orElse(null); existingDepartment.setName(department.getName()); existingDepartment.setEmployees(department.getEmployees()); return departmentRepository.save(existingDepartment); } public String deleteDepartment(Long id) { departmentRepository.deleteById(id); return "Department with id " + id + " has been removed."; } }

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