Java格式化日期

1.背景

2.匹配模式详解

字符 解释                    例子
G   Era designator          AD
y   Year                    1996; 96
Y   Week year   Year        2009; 09
M   Month in year           July; Jul; 07
w   Week in year            27
W   Week in month           2
D   Day in year             189
d   Day in month            10
F   Day of week in month    2
E   Day name in week        Tuesday; Tue
u   Day number of week (1 = Monday, ..., 7 = Sunday)    1
a   Am/pm marker            PM
H   Hour in day (0-23)      0
k   Hour in day (1-24)      24
K   Hour in am/pm (0-11)    0
h   Hour in am/pm (1-12)    12
m   Minute in hour          30
s   Second in minute        55
S   Millisecond             978
z   Time zone               PST; GMT-08:00
Z   Time zone               -0800
X   Time zone               -08; -0800; -08:00

3.具体使用

package com.ds.domain;

import java.text.SimpleDateFormat;
import java.util.Date;

public class DS {

public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sFormat = new SimpleDateFormat();
//2016-03-16 16:12:19.239
sFormat.applyPattern("yyyy-MM-dd HH:mm:ss.SS");
//2016-03-16 04:11:41
//实际位数大于定义位数，则往前面补0，如此处的小时04，月份03
sFormat.applyPattern("yyyy-MM-dd KK:mm:ss");
System.out.println(sFormat.format(date));
}

}