java中时间格式匹配

// This file contains date formats that Frink will parse.
// See documentation for SimpleDateParser or docs/index.html for more details.
//
// Now that regular expressions are possible in Frink, I'd like to replace this
// whole mess with a regexp-based solution, which would be more flexible and
// more powerful.
//
// Alan Eliasen
//
// Symbol       Meaning         Presentation    Example
//
// G            era designator  Text            AD
// y            year            Number          1996
// M            month in year   Text & Number   July & 07
// d            day in month    Number          10
// h            hour in am/pm   Number          12
//                  (1-12)
// H            hour in day     Number          0
//                  (0-23)
// m            minute in hour  Number          30
// s            second in min.  Number          55
// S            millisecond     Number          978
// E            day in week     Text            Tuesday
// D            day in year     Number          189
// F            day of week     Number          2 (2nd Wed in July)
//                in month
// w            week in year    Number          27
// W            week in month   Number          2
// a            am/pm marker    Text            PM
// k            hour in day     Number          24
//               (1-24)
// K            hour in am/pm   Number          0
//               (0-11)
// '            escape for text Delimiter
// ''           single quote    Literal         '

// Most significant digits are first, as it should be.  These are the
// preferred formats.  This also matches ISO-8601 date conventions, so if
// you're trying to be international, always use yyyy-MM-dd.

###  yyyy-MM-dd HH:mm:ss.SSS    ### // Full 24-hour format with milliseconds
###  yyyy/MM/dd HH:mm:ss.SSS    ### // Full 24-hour format with milliseconds
###  yyyy-MM-dd h:mm:ss.SSS a   ### // 12-hour format with milliseconds
###  yyyy/MM/dd h:mm:ss.SSS a   ### // 12-hour format with milliseconds

###  yyyy-MM-dd HH:mm:ss      ###   // Full 24-hour format
###  yyyy/MM/dd HH:mm:ss      ###   // Full 24-hour format
###  yyyy-MM-dd h:mm:ss a     ###   // Full 12-hour format
###  yyyy/MM/dd h:mm:ss a     ###   // Full 12-hour format

###  yyyy-MM-dd HH:mm         ###   // 24-hour format, no seconds
###  yyyy/MM/dd HH:mm         ###   // 24-hour format, no seconds
###  yyyy-MM-dd h:mm a        ###   // 12-hour format, no seconds
###  yyyy/MM/dd h:mm a        ###   // 12-hour format, no seconds

###  yyyy-MM-dd HH            ###   // 24-hour format, hour only
###  yyyy/MM/dd HH            ###   // 24-hour format, hour only
###  yyyy-MM-dd h a           ###   // 12-hour format, hour only
###  yyyy/MM/dd h a           ###   // 12-hour format, hour only

###  yyyy-MM-dd               ###   // Date only
###  yyyy/MM/dd               ###   // Date only

// All the same as above with AD or BC preceding:

###  G yyyy-MM-dd HH:mm:ss.SSS    ### // Full 24-hour format with milliseconds
###  G yyyy/MM/dd HH:mm:ss.SSS    ### // Full 24-hour format with milliseconds
###  G yyyy-MM-dd h:mm:ss.SSS a   ### // 12-hour format with milliseconds
###  G yyyy/MM/dd h:mm:ss.SSS a   ### // 12-hour format with milliseconds

###  G yyyy-MM-dd HH:mm:ss      ###   // Full 24-hour format
###  G yyyy/MM/dd HH:mm:ss      ###   // Full 24-hour format
###  G yyyy-MM-dd h:mm:ss a     ###   // Full 12-hour format
###  G yyyy/MM/dd h:mm:ss a     ###   // Full 12-hour format

###  G yyyy-MM-dd HH:mm         ###   // 24-hour format, no seconds
###  G yyyy/MM/dd HH:mm         ###   // 24-hour format, no seconds
###  G yyyy-MM-dd h:mm a        ###   // 12-hour format, no seconds
###  G yyyy/MM/dd h:mm a        ###   // 12-hour format, no seconds

###  G yyyy-MM-dd HH            ###   // 24-hour format, hour only
###  G yyyy/MM/dd HH            ###   // 24-hour format, hour only
###  G yyyy-MM-dd h a           ###   // 12-hour format, hour only
###  G yyyy/MM/dd h a           ###   // 12-hour format, hour only

###  G yyyy-MM-dd               ###   // Date only
###  G yyyy/MM/dd               ###   // Date only

// Dates in the form "August 19, 1969"
### MMM dd, yyyy                 ###  // Date only
### MMM dd, yyyy HH:mm           ###  // Date and time, 24-hour format
### MMM dd, yyyy HH:mm:ss        ###  // Date and time, 24-hour format
### MMM dd, yyyy HH:mm:ss.SSS    ###  // Date and time, 24-hour format
### MMM dd, yyyy h:mm a          ###  // 12-hour format, no seconds
### MMM dd, yyyy h:mm:ss a       ###  // 12-hour format with seconds
### MMM dd, yyyy h:mm:ss.SSS a   ###  // 12-hour format, seconds & millisec

// Same as above without a space after the comma.  Ugh.  We need regular
// expressions for date parsing.
### MMM dd,yyyy                 ###  // Date only
### MMM dd,yyyy HH:mm           ###  // Date and time, 24-hour format
### MMM dd,yyyy HH:mm:ss        ###  // Date and time, 24-hour format
### MMM dd,yyyy HH:mm:ss.SSS    ###  // Date and time, 24-hour format
### MMM dd,yyyy h:mm a          ###  // 12-hour format, no seconds
### MMM dd,yyyy h:mm:ss a       ###  // 12-hour format with seconds
### MMM dd,yyyy h:mm:ss.SSS a   ###  // 12-hour format, seconds & millisec

// Dates in the astronomical format 1969 August 10
### yyyy MMM dd                 ###  // Date only
### yyyy MMM dd HH:mm           ###  // Date and time, 24-hour format
### yyyy MMM dd HH:mm:ss        ###  // Date and time, 24-hour format w/sec
### yyyy MMM dd HH:mm:ss.SSS    ###  // Date and time, 24-hour format w/ms
### yyyy MMM dd h:mm            ###  // Date and time, 12-hour format
### yyyy MMM dd h:mm:ss         ###  // Date and time, 12-hour format
### yyyy MMM dd h:mm:ss.SSS     ###  // Date and time, 12-hour format

// Reversed format 10 August 1969
### dd MMM yyyy                 ###  // Date only
### dd MMM yyyy HH:mm           ###  // Date and time, 24-hour format
### dd MMM yyyy HH:mm:ss        ###  // Date and time, 24-hour format w/sec
### dd MMM yyyy HH:mm:ss.SSS    ###  // Date and time, 24-hour format w/ms
### dd MMM yyyy h:mm            ###  // Date and time, 12-hour format
### dd MMM yyyy h:mm:ss         ###  // Date and time, 12-hour format
### dd MMM yyyy h:mm:ss.SSS     ###  // Date and time, 12-hour format

// Are the following useful?
###  yyyy-MM                  ###   // Year and month
###  yyyy/MM                  ###   // Year and month
###  G yyyy-MM                  ###   // Year and month
###  G yyyy/MM                  ###   // Year and month

// This will of course conflict if we ever want to define simply a time
// in 2400 format.  And damn SimpleDateFormat lets ANY damn thing match this.
###  yyyy                     ###   // Year only
###  yyyy G                   ###   // Year and AD/BC

// The following are time formats with unknown dates.
// These will parse generally to "today," but that's really sloppy and
// unreliable so include the date if you want to be safe.

###  HH:mm:ss.SSS    ###  // Full time format with milliseconds (24-hr)
###  h:mm:ss.SSS a   ###  // Full time format with milliseconds (12-hr)
###  HH:mm:ss      ###     // Full time format                  (24-hr)
###  h:mm:ss a     ###     // Full time format                  (12-hr)
###  HH:mm         ###     // Hour and minute                   (24-hr)
###  h:mm a        ###     // Hour and minute                   (12-hr)

// You can also define the default output format with 4 pound signs.
// Without any definition, you get the Java default (which should theoretically
// get it from your system's settings,) but the following gives lots of
// informati
4000
on:

#### G yyyy-MM-dd hh:mm:ss.SSS a (E) zzzz ####

// Make it so we can parse the default output format.
### G yyyy-MM-dd hh:mm:ss.SSS a (E) zzzz ###