JDK提供了两个方法,System.currentTimeMillis()和System.nanoTime(),这两个方法都可以用来获取表征当前时间的数值。但是如果不仔细辨别这两个方法的差别和联系,在使用当中也很容易出错。笔者在前不久的工作当中使用System.currentTimeMillis()时就踩了一个大坑,后来在查明System.currentTimeMillis()和System.nanoTime(...
import java.util.Date; // 获取当前时间戳(毫秒级) long timestamp = System.currentTimeMillis(); // 将时间戳转换为日期对象 Date dateObject = new Date(timestamp); // 将日期对象转换为时间戳 long newTimestamp = dateObject.getTime();
测试类往数据库插入数据 publicclassUsersMapperTestextendsBaseTest{@Resourceprivate UsersMapper usersMapper;@Testpublicvoidtest(){for (int i = ; i < 500000; i++) {long time = System.currentTimeMillis(); usersMapper.saveUsers(Users.builder().timeDate(new Date(time)).timeLong(time).timeTime...
let now: DateTime<Local> = Local::now(); let mills: i64 = now.timestamp_millis(); println!("获取毫秒的值: {}", mills); let dt: DateTime<Local> = Local.timestamp_millis(mills); // date time parsed millis: 2021-01-04 20:01:36.945 +08:00 println!("获取精确到毫秒时间: {}",...
方法1:Timestamptimestamp=newTimestamp(System.currentTimeMillis());方法2:Datedate=newDate();Timestamptimestamp=newTimestamp(date.getTime()); //Timestamp转化为String,定义格式,不显示毫秒SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy-MM-dd HH:mm:ss");Timestamptimestamp=newTimestamp(System.cu...
Assert.isTrue(!StringUtils.isEmpty(appId) && !StringUtils.isEmpty(timestamp) && !StringUtils.isEmpty(sign),"参数错误");longreqeustInterval = System.currentTimeMillis() -Long.valueOf(timestamp); Assert.isTrue(reqeustInterval<5*60*1000,"请求过期,请重新请求");//1. 根据appId查询数据库获取appSecr...
Timestamp timestamp = new Timestamp(System.currentTimeMillis()); 复制代码 使用指定的时间戳值(毫秒数): long millis = 1612345678900L; // 替换为所需的时间戳值 Timestamp timestamp = new Timestamp(millis); 复制代码 使用指定的日期和时间: LocalDateTime localDateTime = LocalDateTime.of(2022, 3,...
Calendar c = Calendar.getInstance();c.set(Calendar.HOUR_OF_DAY, 0);c.set(Calendar.MINUTE, 0);c.set(Calendar.SECOND, 0);Timestamp stamp = new Timestamp(c.getTime().getTime());System.out.println(stamp.toString());
Timestamp timestamp =newTimestamp(System.currentTimeMillis()); Date date=newDate();try{ date=timestamp; System.out.println(date); }catch(Exception e) { e.printStackTrace(); } 注意:但是此刻date对象指向的实体却是一个Timestamp,即date拥有Date类的方法,但被覆盖的方法的执行实体在Timestamp中。
Using Java as an example, System.currentTimeMillis() returns just that, a UNIX timestamp in milliseconds - UNIX timestamps will often be measured in seconds as well (but System.currentTimeMillis() will always be in milliseconds). Following is a table that unifies these concepts: A human ...