日期格式化

 1 import  java.util. * ;
 2 import  java.text. * ;
 3 import  java.io. * ;
 4 public   class  Test3 {
 5      private  Date date;
 6      private  Calendar calendar;
 7      private  SimpleDateFormat dateFormat;
 8      public   static   final  String s1 = " yyyy-MM-dd‘T‘HH:mm:ss.SSSZ " ;
 9      public   static   final  String s2 = " yyyy-MM-dd HH:mm:ss.SSSZ " ;
10      public   static   final  String s3 = " yyyy年MM月dd号 HH:mm:ss.SSSZ " ;
11      public   static   final  String s4 = " yyyy年MM月dd号 HH:mm:ss " ;
12     
13      public   void  Test(String arg) {
14         date = new  Date();
15         calendar = Calendar.getInstance();
16         dateFormat = new  SimpleDateFormat(arg);
17         String str1 = dateFormat.format(date);
18         String str2 = dateFormat.format(calendar.getTime());
19         System.out.println(str1 + " \n " + str2);        
20     }
21     
22      public   static   void  main(String[] s) {
23         BufferedReader in = new  BufferedReader( new  InputStreamReader(System.in));
24         String string = "" ;
25         System.out.println( " 输入待格式化的选项:\n " +
26              " 1:yyyy-MM-dd‘T‘HH:mm:ss.SSSZ\n " +
27              " 2:yyyy-MM-dd HH:mm:ss.SSSZ\n " +
28              " 3:yyyy年MM月dd号 HH:mm:ss.SSSZ\n " +
29              " 4:yyyy年MM月dd号 HH:mm:ss "
30         );
31          try {
32              switch (in.read()) {
33                  case   ‘ 1 ‘ :string = s1; break ;
34                  case   ‘ 2 ‘ :string = s2; break ;
35                  case   ‘ 3 ‘ :string = s3; break ;
36                  case   ‘ 4 ‘ :string = s4; break ;
37                  default :string = s4;
38             }
39         } catch (Exception e) {}
40          new  Test3().Test(string);
41     }
42 }

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注：参数还有:

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