Java Regex for ISO8601

gistfile1.txt

^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$

// Match

2009-12T12:34
2009
2009-05-19
2009-05-19
20090519
2009123
2009-05
2009-123
2009-222
2009-001
2009-W01-1
2009-W51-1
2009-W511
2009-W33
2009W511
2009-05-19
2009-05-19 00:00
2009-05-19 14
2009-05-19 14:31
2009-05-19 14:39:22
2009-05-19T14:39Z
2009-W21-2
2009-W21-2T01:22
2009-139
2009-05-19 14:39:22-06:00
2009-05-19 14:39:22+0600
2009-05-19 14:39:22-01
20090621T0545Z
2007-04-06T00:00
2007-04-05T24:00
2010-02-18T16:23:48.5
2010-02-18T16:23:48,444
2010-02-18T16:23:48,3-06:00
2010-02-18T16:23.4
2010-02-18T16:23,25
2010-02-18T16:23.33+0600
2010-02-18T16.23334444
2010-02-18T16,2283
2009-05-19 143922.500
2009-05-19 1439,55

// Not match

200905
2009367
2009-
2007-04-05T24:50
2009-000
2009-M511
2009M511
2009-05-19T14a39r
2009-05-19T14:3924
2009-0519
2009-05-1914:39
2009-05-19 14:
2009-05-19r14:39
2009-05-19 14a39a22
200912-01
2009-05-19 14:39:22+06a00
2009-05-19 146922.500
2010-02-18T16.5:23.35:48
2010-02-18T16:23.35:48
2010-02-18T16:23.35:48.45
2009-05-19 14.5.44
2010-02-18T16:23.33.600
2010-02-18T16,25:23:48,444