我有时间以毫秒为单位如何在hh：mm：ss格式的两个日期之间得到差异以存储在数据库中

Question

这是我的defaultuser服务类我希望差异以hh:mm:ss格式存储在数据库中（我使用spring mvc + hibernate）

@Override
@Transactional
public LoginLog punchLogoutTime(User user) {
    LoginLog log = getOpenUserLoginLog(user);
    log.setLogoutTime(new Date());
    long diff=log.getLogoutTime().getTime()-log.getLoginTime().getTime();
    log.setTotalTime(diff);
    log = loginLogDao.update(log);
    return log;
}

  

这是我的pojo课程。我花了很长时间。

@Column(name = "total_time")
private Long totalTime;

public Long getTotalTime() {
    return totalTime;
}

public void setTotalTime(Long difference) {
    this.totalTime = difference;
}

请告诉我适当的答案。谢谢：）

Answer 1

//assume diff is in millisec


DateFormat df = new SimpleDateFormat("dd:MM:yy:HH:mm:ss");
        System.out.println(df.format(diff));

//remove dd:mm:yy if you want

Answer 2

修改您的实体类（如下所示）以指定Date的格式。

//Create Table SQL in SQL Server
  CREATE TABLE "DBO"."Test"(
     Id INT PRIMARY KEY NOT NULL,
     difftime TIME not null
  )

//Entity Code
@Entity(name = "Test")
@Table(name = "Test")
public class Test {

    @Id
    @Column(name = "Id")
    private int id;

    @Column(name = "difftime")
    @DateTimeFormat(pattern = "hh:mm:ss")
    private Date time;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public Date getTime() {
        return time;
    }

    public void setTime(Date time) {
        this.time = time;
    }

}

//用于保存的控制器代码

 @Override
        @Transactional
        public LoginLog punchLogoutTime(User user) {
            LoginLog log = getOpenUserLoginLog(user);
            log.setLogoutTime(new Date());
            long diff=log.getLogoutTime().getTime()-log.getLoginTime().getTime();
            Date totalTimeIn=new Date();
            totalTimeIn.setTime(diff);          
            log.setTotalTime(totalTimeIn);
            log = loginLogDao.update(log);
            return log;
        }