还用的正表达式

//libicucore.dylib

[pattern]    Match any one character from the set. See ICU Regular Expression Character Classes for a full description of what may appear in the pattern.
[a]    The set containing a.
[a-z]    The set containing a through z and all letters in between, in Unicode order.
[^a-z]    The set containing all characters but a through z, that is, U+0000 through a-1 and z+1 through U+FFFF.
[[pat1][pat2]]    The union of sets specified by pat1 and pat2.
[[pat1]&[pat2]]    The intersection of sets specified by pat1 and pat2.
[[pat1]-[pat2]]    The asymmetric difference of sets specified by pat1 and pat2.
[abc{def}]    A set containing four members, the single characters a, b, and c and the string def
[{abc}{def}]    A set containing two members, the string abc and the string def.
[{a}{b}{c}][abc]    These two sets are equivalent. Each contains three items, the three individual characters a, b, and c. A {string} containing a single character is equivalent to that same character specified in any other way

{n}    Match exactly n times.
{n,}    Match at least n times. Match as many times as possible.
{n,m}    Match between n and m times. Match as many times as possible, but not more than m.

*    Match zero or more times. Match as many times as possible.
+    Match one or more times. Match as many times as possible.
?    Match zero or one times. Prefer one.

\w    Match a word character. Word characters are [\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}].
\W    Match a non-word character.
\s    Match a white space character. White space is defined as [\t\n\f\r\p{Z}].
\S    Match a non-white space character.
\d    Match any character with the Unicode General Category of Nd (Number, Decimal Digit).
\D    Match any character that is not a decimal digit.
\b, outside of a [Set]    Match if the current position is a word boundary. Boundaries occur at the transitions between word \w and non-word \W characters, with combining marks ignored

.    Match any character.
^    Match at the beginning of a line.
$    Match at the end of a line.

\  Quotes the following character. Characters that must be quoted to be treated as literals are * ? + [ ( ) { } ^ $ | \ . /

Integer    [+\-]?[0-9]+    123-42+23
Hex Number    0[xX][0-9a-fA-F]+    0x00xdeadbeef0xF3
Floating Point    [+\-]?(?:[0-9]*\.[0-9]+|[0-9]+\.)    123..123+.42
Floating Point with Exponent    [+\-]?(?:[0-9]*\.[0-9]+|[0-9]+\.)(?:[eE][+\-]?[0-9]+)?    123..12310.0E131.23e-7
Comma Separated Number    [0-9]{1,3}(?:,[0-9]{3})*    421,2341,234,567
Comma Separated Number    [0-9]{1,3}(?:,[0-9]{3})*(?:\.[0-9]+)?    421,2341,234,567.89
HTTP    \bhttps?://[a-zA-Z0-9\-.]+(?:(?:/[a-zA-Z0-9\-._?,'+\&%$=~*!():@\\]*)+)?
HTTP    \b(https?)://([a-zA-Z0-9\-.]+)((?:/[a-zA-Z0-9\-._?,'+\&%$=~*!():@\\]*)+)?
HTTP    \b(https?)://(?:(\S+?)(?::(\S+?))?@)?([a-zA-Z0-9\-.]+)(?::(\d+))?((?:/[a-zA-Z0-9\-._?,'+\&%$=~*!():@\\]*)+)?
E-Mail    \b([a-zA-Z0-9%_.+\-]+)@([a-zA-Z0-9.\-]+?\.[a-zA-Z]{2,6})\b
Hostname    \b(?:[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}?[a-zA-Z0-9]\.)+[a-zA-Z]{2,6}\b
IP    \b(?:\d{1,3}\.){3}\d{1,3}\b
IP with Optional Netmask    \b((?:\d{1,3}\.){3}\d{1,3})(?:/(\d{1,2}))?\b
IP or Hostname    \b(?:(?:\d{1,3}\.){3}\d{1,3}|(?:[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}?[a-zA-Z0-9]\.)+[a-zA-Z]{2,6})\b

// finds phone number in format nnn-nnn-nnnn
{3}-[0-9]{3}-[0-9]{4}

//
(\\w+)\\s+(\\w+)\\s+(\\w+)

//This is neat.
\\b(\\w+)\\b

//$10.23, $1024.42, $3099
\\$((\\d+)(?:\\.(\\d+)|\\.?))

//one\ntwo\n\nfour\n
(?m)^.*$