Java Simpledateformat 案例集合

最新推荐文章于 2025-12-17 15:03:56 发布

原创最新推荐文章于 2025-12-17 15:03:56 发布 · 163 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java

本文详细解读了Java中的SimpleDateFormat，介绍了其各类格式化符号如G、y、M等，并展示了常见日期格式的示例，帮助开发者理解和使用日期处理。

摘要自：Java SimpleDateFormat

一、DateFormat 的语义释义

G	Era designator (before christ, after christ)
y	Year (e.g. 12 or 2012). Use either yy or yyyy.
M	Month in year. Number of M's determine length of format (e.g. MM, MMM or MMMMM)
d	Day in month. Number of d's determine length of format (e.g. d or dd)
h	Hour of day, 1-12 (AM / PM) (normally hh)
H	Hour of day, 0-23 (normally HH)
m	Minute in hour, 0-59 (normally mm)
s	Second in minute, 0-59 (normally ss)
S	Millisecond in second, 0-999 (normally SSS)
E	Day in week (e.g Monday, Tuesday etc.)
D	Day in year (1-366)
F	Day of week in month (e.g. 1st Thursday of December)
w	Week in year (1-53)
W	Week in month (0-5)
a	AM / PM marker
k	Hour in day (1-24, unlike HH's 0-23)
K	Hour in day, AM / PM (0-11)
z	Time Zone
'	Escape for text delimiter
'	Single quote

二、常见DateFormat 类型

Pattern	Example
dd-MM-yy	31-01-12
dd-MM-yyyy	31-01-2012
MM-dd-yyyy	01-31-2012
yyyy-MM-dd	2012-01-31
yyyy-MM-dd HH:mm:ss	2012-01-31 23:59:59
yyyy-MM-dd HH:mm:ss.SSS	2012-01-31 23:59:59.999
yyyy-MM-dd HH:mm:ss.SSSZ	2012-01-31 23:59:59.999+0100
EEEEE MMMMM yyyy HH:mm:ss.SSSZ	Saturday November 2012 10:45:42.720+0100