find：
1、
该正则表达式：
initEcharts *:{1} *{{1}
匹配：
initEcharts : {
其中冒号两边允许无限个空格；
2、
#[a-zA-Z]*#
匹配：
两边以井号结束，中间无数个字母的字符串；
说明：点击 Regex右边的问号可以查看正则表达式的规则，如下：
Summary of regular-expression constructs
Construct
Matches
Characters
x
The character x
\
The backslash character
n
The character with octal value 0n (0 <= n <= 7)
nn
The character with octal value 0nn (0 <= n <= 7)
mnn
The character with octal value 0mnn (0 <= m <= 3, 0 <= n <= 7)
xhh
The character with hexadecimal value 0xhh
uhhhh
The character with hexadecimal value 0xhhhh
The tab character ('u0009')
The newline (line feed) character ('u000A')
The carriage-return character ('u000D')
f
The form-feed character ('u000C')
a
The alert (bell) character ('u0007')
e
The escape character ('u001B')
cx
The control character corresponding to x
Character classes
[abc]
a, b, or c (simple class)
[^abc]
Any character except a, b, or c (negation)
[a-zA-Z]
a through z or A through Z, inclusive (range)
[a-d[m-p]]
a through d, or m through p: [a-dm-p] (union)
[a-z&&[def]]
d, e, or f (intersection)
[a-z&&[^bc]]
a through z, except for b and c: [ad-z] (subtraction)
[a-z&&[^m-p]]
a through z, and not m through p: [a-lq-z](subtraction)
Predefined character classes
.
Any character (may or may not match line terminators)
d
A digit: [0-9]
D
A non-digit: [^0-9]
s
A whitespace character: [
x0Bf
]
S
A non-whitespace character: [^s]
w
A word character: [a-zA-Z_0-9]
W
A non-word character: [^w]
POSIX character classes (US-ASCII only)
p{Lower}
A lower-case alphabetic character: [a-z]
p{Upper}
An upper-case alphabetic character:[A-Z]
p{ASCII}
All ASCII:[x00-x7F]
p{Alpha}
An alphabetic character:[p{Lower}p{Upper}]
p{Digit}
A decimal digit: [0-9]
p{Alnum}
An alphanumeric character:[p{Alpha}p{Digit}]
p{Punct}
Punctuation: One of !"#$%&'()*+,-./:;=>?@[]^_`{|}~
p{Graph}
A visible character: [p{Alnum}p{Punct}]
p{Print}
A printable character: [p{Graph}x20]
p{Blank}
A space or a tab: [ ]
p{Cntrl}
A control character: [x00-x1Fx7F]
p{XDigit}
A hexadecimal digit: [0-9a-fA-F]
p{Space}
A whitespace character: [
x0Bf
]
java.lang.Character classes (simple java character type)
p{javaLowerCase}
Equivalent to java.lang.Character.isLowerCase()
p{javaUpperCase}
Equivalent to java.lang.Character.isUpperCase()
p{javaWhitespace}
Equivalent to java.lang.Character.isWhitespace()
p{javaMirrored}
Equivalent to java.lang.Character.isMirrored()
Classes for Unicode blocks and categories
p{InGreek}
A character in the Greek block (simple block)
p{Lu}
An uppercase letter (simple category)
p{Sc}
A currency symbol
P{InGreek}
Any character except one in the Greek block (negation)
[p{L}&&[^p{Lu}]]
Any letter except an uppercase letter (subtraction)
Boundary matchers
^
The beginning of a line
$
The end of a line
A word boundary
B
A non-word boundary
A
The beginning of the input
G
The end of the previous match
The end of the input but for the final terminator, if any
z
The end of the input
Greedy quantifiers
X?
X, once or not at all
X*
X, zero or more times
X+
X, one or more times
X{n}
X, exactly n times
X{n,}
X, at least n times
X{n,m}
X, at least n but not more than m times
Reluctant quantifiers
X??
X, once or not at all
X*?
X, zero or more times
X+?
X, one or more times
X{n}?
X, exactly n times
X{n,}?
X, at least n times
X{n,m}?
X, at least n but not more than m times
Possessive quantifiers
X?+
X, once or not at all
X*+
X, zero or more times
X++
X, one or more times
X{n}+
X, exactly n times
X{n,}+
X, at least n times
X{n,m}+
X, at least n but not more than m times
Logical operators
XY
X followed by Y
X|Y
Either X or Y
(X)
X, as a capturing group
Back references
Whatever the nth capturing group matched
Quotation
Nothing, but quotes the following character
Q
Nothing, but quotes all characters until E
E
Nothing, but ends quoting started by Q
Special constructs (non-capturing)
(?:X)
X, as a non-capturing group
(?idmsux-idmsux)
Nothing, but turns match flags on - off
(?idmsux-idmsux:X)
X, as a non-capturing group with the given flags on - off
(?=X)
X, via zero-width positive lookahead
(?!X)
X, via zero-width negative lookahead
(?<=X)
X, via zero-width positive lookbehind
(?<!X)
X, via zero-width negative lookbehind
(?>X)
X, as an independent, non-capturing group
More on Regular Expressions: Full Java Regular Expressions syntax description, Using Regular Expressions in Java.