java - 由于静态问题，时间不会以动态形式返回

Question

我需要通过我的服务类显示最新时间戳:

@Service
public class UserServiceImpl implements UserService {

    private static final AtomicInteger counter = new AtomicInteger();
    private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");
    static Timestamp timestamp = new Timestamp(System.currentTimeMillis());

    static List<User> users = new ArrayList<User>(
            Arrays.asList(
                          new User("123","abc","A1234567", "a529794b3ea9c05d8f0b5f354dac25e5", "Role-A","Screen A","Execute",sdf.format(timestamp) )));

    @Override
    public List<User> getAll(int offset, int count) {
        return users;
    }

输出如下:

[{"hkid":"123","username":"abc","passportNo":"A1234567","tokenId":"a529794b3ea9c05d8f0b5f354dac25e5","role":"Role-A","permission":"Execute","timestamp":"2018.04.02.12.16.19","screen":"Screen A"}]

现在的问题是时间戳不会作为当前时间戳返回，因为我的时间戳文件是静态的。我需要进行哪些必要的更改才能始终获得当前时间戳。我必须使用静态对象。

补充一下:在 pojo 中，我将时间戳记为字符串

public class User implements Serializable {

    private String id;
    private String username;
    private String passportNo;
    private String tokenId;
    private String role;
    private String Screen ;
    private String permission;
    private String timestamp ;

Answer 1

您可以在每次调用 getAll 时动态更新它:

@Override
public List<User> getAll(int offset, int count) {
    String ts = sdf.format(new Timestamp(System.currentTimeMillis()));
    users.forEach(u -> u.setTimestamp(ts));
    return users;
}