静态方法中注入Mapper接口

@Component
public class WordUtil {
    
	@Autowired
    private OfficeMapper officeMapper;
    private static WordUtil WordUtil;

    @PostConstruct
    public void init() {
        WordUtil = this;
        WordUtil.officeMapper = this.officeMapper;
    }
    
    public static void main(String[] args) {
        OfficeFileDTO officeFileDTO = new OfficeFileDTO();
        int res = WordUtil.officeMapper.saveOfficeFileInfo(officeFileDTO);
    }
   
}