遞歸查詢該部門下所有子部門

 public class AddressServiceImpl implements AddressService {
//定義全局變量idList,查出該部門下的子部門后，放進去
    private  List<Long> idList=new ArrayList();
    @Autowired
    private AddressMapper addressMapper;

    
    @Override
    public List<Address> selectInParent(Long id) {
        List<Long> ids=getIds(id);
        ids.add(id);
        List<Address> addressList=addressMapper.selectInParent(ids,Constants.ABLE_CONFIG.DEFAULT_ABLE);
//***用完后清空該集合，不然再次查詢時，之前的查詢的部門也在里面
        idList.clear();
        return addressList;
    }

//遞歸方法，私有的
    private List<Long> getIds(Long id){
        List<Address> list=addressMapper.selectByParent(id,Constants.ABLE_CONFIG.DEFAULT_ABLE);

        for (int i=0;i<list.size();i++){
            idList.add(list.get(i).getId());
            getIds(list.get(i).getId());
        }
        return idList;
    }

}