时间戳和日期之间的相互转换-蒲公英云

时间戳和日期之间的相互转换

Myth丶恋晨 2021-11-27 03:24 763阅读 0赞

获取时间戳（timeStamp)

return 精确到秒

public String getTimeStamp() {

long time = System.currentTimeMillis();
return String.valueOf(time / 1000);

}

时间戳转换成日期格式字符串（timeStamp —> Date）

seconds 精确到秒的字符串

public String timeStamp2Date(String seconds, String format) {

if (seconds == null || seconds.isEmpty() || seconds.equals("null")) {
    return "";
}
if (format == null || format.isEmpty()) {
    format = "yyyy-MM-dd HHss";
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(new Date(Long.valueOf(seconds + "000")));

}

日期格式字符串转换成时间戳（format —> timeStamp）

formatDate 字符串日期 yyyy-MM-dd HHss

public String formatDate2TimeStamp(String formatDate, String format) {

try {
    SimpleDateFormat sdf = new SimpleDateFormat(format);
    return String.valueOf(sdf.parse(formatDate).getTime() / 1000);
    } catch (Exception e) {
        e.printStackTrace();
}
return "";

}

毫秒时间戳转换成日期格式字符串（seconds —> formatDate）

seconds 精确到秒的字符串

public String timeStampms2Date(String seconds, String format) {

if (seconds == null || seconds.isEmpty() || seconds.equals("null")) {
    return "";
}
if (format == null || format.isEmpty()) {
    format = "yyyy-MM-dd HHss";
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(new Date(Long.valueOf(seconds)));

}

写个main方法简单测试上述方法：

public class DateUtilTest {
    public static void main(String[] args) {
        DateUtil du = new DateUtil();
        String timeStamp = du.getTimeStamp();
        System.out.println("取得当前时间戳timeStamp = " + timeStamp);
        String timeStampms = String.valueOf(System.currentTimeMillis());
        String formatDate = du.timeStampms2Date(timeStampms, "yyyy-MM-dd HH:mm:ss");
        System.out.println("毫秒时间戳转换成日期格式字符串seconds  -->  formatDate = " + formatDate);
        String date = du.timeStamp2Date(timeStamp, "yyyy-MM-dd HH:mm:ss");
        System.out.println("时间戳转换成日期格式字符串timeStamp -->  Date = " + date);
        String timeStamp2 = du.formatDate2TimeStamp(date, "yyyy-MM-dd HH:mm:ss");
        System.out.println("日期格式字符串转换成时间戳format  -->  timeStamp = " + timeStamp2);
    }
}