Java Regular Expression extracts the date implementation code from the string

The Regular Expression in java extracts the date implementation code from the string. For more information, see.

You may need to extract or filter the date or time from a String or text. You can use the following program:

The Code is as follows:

Copy code

Public String run (String text ){ String dateStr = text. replaceAll ("r? N ",""); DateStr = dateStr. replaceAll ("\ s + ",""); Try { List matches = null; Pattern p = Pattern. compile ("(\ d {} [-| \/] \ d {} [-| \/] \ d }: \ d {1, 2 }:\ d {1, 2}) ", Pattern. CASE_INSENSITIVE | Pattern. MULTILINE ); Matcher = p. matcher (dateStr ); If (matcher. find () & matcher. groupCount ()> = 1 ){ Matches = new ArrayList (); For (int I = 1; I <= matcher. groupCount (); I ++ ){ String temp = matcher. group (I ); Matches. add (temp ); } } Else { Matches = Collections. EMPTY_LIST; } If (matches. size ()> 0 ){ Return (String) matches. get (0). trim (); } Else { Return ""; } } Catch (Exception e ){ Return ""; } }

The current function of this program is to extract from the string in the form of "yyyy-MM-dd HH: mm: ss" or "yyyy/MM/dd HH: mm: ss. If the time format is short, it cannot be processed, but it can be easily expanded.