每天学点java_Date类使用

浏览数：75 / 时间：2015年06月08日

java.text
Class SimpleDateFormat
    java.lang.Object
        java.text.Format
            java.text.DateFormat
                java.text.SimpleDateFormat

从a-z 代表的意思：

Letter	Date or Time Component	Presentation	Examples
`G`	Era designator	Text	`AD`
`y`	Year	Year	`1996`; `96`
`Y`	Week year	Year	`2009`; `09`
`M`	Month in year	Month	`July`; `Jul`; `07`
`w`	Week in year	Number	`27`
`W`	Week in month	Number	`2`
`D`	Day in year	Number	`189`
`d`	Day in month	Number	`10`
`F`	Day of week in month	Number	`2`
`E`	Day name in week	Text	`Tuesday`; `Tue`
`u`	Day number of week (1 = Monday, ..., 7 = Sunday)	Number	`1`
`a`	Am/pm marker	Text	`PM`
`H`	Hour in day (0-23)	Number	`0`
`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`
`m`	Minute in hour	Number	`30`
`s`	Second in minute	Number	`55`
`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`
`X`	Time zone	ISO 8601 time zone	`-08`; `-0800`; `-08:00`

一些日期显示格式

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`
`"yyyy-MM-dd‘T‘HH:mm:ss.SSSZ"`	`2001-07-04T12:08:56.235-0700`
`"yyyy-MM-dd‘T‘HH:mm:ss.SSSXXX"`	`2001-07-04T12:08:56.235-07:00`
`"YYYY-‘W‘ww-u"`	`2001-W27-3`

一份date代码

package com.czj;

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

public class DateDemo {
    public static void main(String[] args) {
        String pattern="yyyy.MM.dd G ‘at‘ HH:mm:ss z";//要将日期显示成的格式
        
        SimpleDateFormat sdm=new SimpleDateFormat(pattern);
        
        Date date=new Date();
        
        System.out.println(sdm.format(date));
        
    }
    
}

2015.06.04 公元 at 14:33:42 CST