首先在程式碼裡面先用Calendar取得現在的時間與日期：
Calendar today = Calendar.getInstance();
但是取得的today格式很難閱讀，所以再轉換成date格式：
Date date = today.getTime();
Date date = today.getTime();
接著來做時間格式的轉換：
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");//可將括號內的字串換成以下格式
String dateFormat = df.format(date);
最後即可取得需要的時間格式囉！
| Letter | Date or Time Component | Presentation | Examples |
|---|---|---|---|
G
|
Era designator | Text | AD
|
yyyy,yy
|
*Year | Year | 1996; 96
|
MMMM;MMM;MM;M
|
*Month in year | Month | July; Jul; 07;7
|
w
|
Week in year | Number | 27
|
W
|
Week in month | Number | 2
|
D
|
Day in year | Number | 189
|
dd;d
|
*Day in month | Number | 05;5 |
F
|
Day of week in month | Number | 2
|
EEEE;EEE;E
|
Day in week | Text | Tuesday; Tue; 2
|
a
|
Am/pm marker | Text | PM
|
HH;H
|
*Hour in day (0-23) | Number | 02;2 |
kk;k
|
Hour in day (1-24) | Number | 24
|
K
|
Hour in am/pm (0-11) | Number | 0
|
h
|
Hour in am/pm (1-12) | Number | 12
|
mm;m
|
*Minute in hour | Number | 08;8 |
ss;s
|
*Second in minute | Number | 05;5
|
S
|
Millisecond | Number | 978
|
z
|
Time zone | General time zone | Pacific Standard Time; PST; GMT-08:00
|
Z
|
Time zone | RFC 822 time zone | -0800 |
Ex : 2001-07-04 12:08:56
| Date and Time Pattern | Result |
|---|---|
"yyyy.MM.dd G 'at' HH:mm:ss z"
|
2001.07.04 AD at 12:08:56 PDT
|
"EEE, MMM d, ''yy"
|
Wed, Jul 4, '01
|
"h:mm a"
|
12:08 PM
|
"hh 'o''clock' a, zzzz"
|
12 o'clock PM, Pacific Daylight Time
|
"K:mm a, z"
|
0:08 PM, PDT
|
"yyyyy.MMMMM.dd GGG hh:mm aaa"
|
02001.July.04 AD 12:08 PM
|
"EEE, d MMM yyyy HH:mm:ss Z"
|
Wed, 4 Jul 2001 12:08:56 -0700
|
"yyMMddHHmmssZ"
|
010704120856-0700 |
0 comments:
Post a Comment