Static classes use @resource annotation injection

You need to , Take a brief note of

@Component
public class AccountUtil {
    
    
    private static AccountIdDao accountIdDao;

    @Resource
    private AccountIdDao accountDao;

    @PostConstruct
    public void init(){
    
        accountIdDao = accountDao;
    }
    public static List<AccountIdInfoPO> getAccount(String channel) {
    
        // Get the list of users 
        QueryWrapper<AccountIdInfoPO> query = new QueryWrapper<>();
        query.eq("channel", channel);
        return accountIdDao.selectList(query);
    }
}