publicclassMain{publicstaticvoidmain(String[]args){StringdateString="2022-01-01";Stringpattern="yyyy-MM-dd";longmilliseconds=DateUtils.convertDateStringToMilliseconds(dateString,pattern);System.out.println("毫秒数:"+milliseconds);}} 1. 2. 3. 4. 5. 6. 7. 8. 在上面的代码中,我们传递了一个日...
Java提供了java.util.Date和java.util.Calendar类来处理日期和时间的操作。我们可以使用这些类来实现我们的功能。 publicclassTimestampConverter{publiclongconvertToMilliseconds(longtimestamp){Datedate=newDate(timestamp);Calendarcalendar=Calendar.getInstance();calendar.setTime(date);longmilliseconds=calendar.getTimeI...
To sum up, the Java programming language allows us to convert time into milliseconds, which is demonstrated in this article. The conversion can be achieved using the DateTime class. Moreover, if we have an instance of DateTime from the Joda-Time library, we can obtain the milliseconds value ...
java import java.time.Instant; import java.time.LocalDateTime; import java.time.ZoneId; import java.time.format.DateTimeFormatter; public class MillisecondsToDate { public static void main(String[] args) { // 假设我们有一个毫秒数 long milliseconds = System.currentTimeMillis(); // 将毫秒数转换...
如果我没有犯错误，字符串"1428638400000-0400“表示两个信息：
Converts this duration to the total length in milliseconds. If this duration is too large to fit in a long milliseconds, then an exception is thrown. If this duration has greater than millisecond precision, then the conversion will drop any excess precision information as though the amount in ...
importjava.util.Date;importjava.util.TimeZone;publicclassTest{publicstaticvoidmain(String[]args){// The default time zone makes no difference when constructing// a Date from a milliseconds-since-Unix-epoch valueDatedate=newDate(-14159020000L);// Display the instant in three different time zones...
Date 类 new Date() 用当前日期和时间创建新的日期对象: new Date(milliseconds) 创建一个零时加毫秒的新日期对象 返回从 1970 年 1月 1 日0时0分0 秒(UTC,即世界协调时)距离该日期对象所代表时间的毫秒数。 代码语言:javascript 复制 // 从 1970 年1月1日 早上 8 点 0 分 0 秒 开始经历的时间Syst...
1. java.sql.Date.valueOf(java.lang.String) public static Date valueOf(String s) Converts a string in JDBC date escape format to a Date value. Parameters: s - a String object representing a date in in the format "yyyy-mm-dd"
Converts the given time duration in the given unit to this unit. Conversions from finer to coarser granularities truncate, so lose precision. For example, converting 999 milliseconds to seconds results in 0. Conversions from coarser to finer granularities with arguments that would numerically overflo...