Regular Expressions practice
Determine identity: either 15 or 18 digits, the last one can be a letter, and asked them to write the program date.
static void main public (String [] args) {
testID_Card ();
}
public static void testID_Card () {
// test whether a valid ID number
String [] = {STRs "130681198712092019", "13068119871209201x",
"13068119871209201" , "123456789012345", "12345678901234x",
"1234567890123"};
// prepare regular expressions (identity card 15 and 18 are two, the last one identity may be letters)
String regex = "(\\ d 14} \\ W {) | D \\ \\ {W}. 17 ";
// ready to match, it is determined whether the input is all right
Pattern regular = Pattern.compile (regex); // Create a matching rule Patter
the StringBuilder new new SB = the StringBuilder ();
// through all strings to be matched
for (int i = 0; i <strs.length; i++) {
Matcher matcher = regular.matcher (strs [i ]); // Create a Matcher
sb.append ( "ID:");
sb.append (STRs [I]);
sb.append ( "Match:");
SB .append (matcher.matches ());
System.out.println (sb.toString ());
sb.delete (0, sb.length ()); // Clear method StringBuilder
}
GetBirthDay (STRs);
}
Private void GetBirthDay static (String [] STRs) {
System.out.println ( "ready to get the date of birth");
// prepare validation rules
Pattern BirthDayRegular = Pattern.compile ( "(\\ d {6}) (\\ d {8}) (*). ");
// * together any number of means does not contain newline characters.
the Pattern YearMonthDayRegular the Pattern =
.compile ("(\\d{4})(\\d{2})(\\d{2})");
for (int I = 0; I <strs.length; I ++) {
Matcher Matcher = BirthDayRegular.matcher (STRs [I]);
IF (matcher.matches ()) {
Matcher matcher2 = YearMonthDayRegular
.matcher (Matcher.group (2 ));
IF (matcher2.matches ()) {
System.out.println (STRs [I] + "the date of birth decomposition:" + "in" + matcher2.group (1) + "month:"
+ matcher2.group (2) + "day:" + matcher2.group (. 3));
}
}
}
}