js:
var m = /(\d{4}-\d{2}-\d{2}\d{2}:\d{2}:\d{2})|(\d{2}-\d{2}\d{2}:\d{2}:\d{2})|(\d{2}:\d{2}:\d{2})/;
var s = "2012-01-23 21:08:29";
//s = "01-23 21:08:29";
//s = "21:08:29";
alert(m.test(s));
java:将上面的\d换成\\d
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