Groovy学习笔记-正则表达式

参考文献地址：http://docs.groovy-lang.org/docs/groovy-2.5.8/html/documentation/#_regular_expression_operators

1.创建正则表达式对象

使用 ~ 符号创建java.util.regex.Pattern对象

def p = ~/foo/
p= ~'foo'
p= ~"foo"

println p instanceof Pattern

/*Output
true

*/

2.使用GString来重用Pattern对象

import java.util.regex.Pattern
import java.util.regex.Matcher

def pattern = ~/foo/
def p = ~"${pattern}"
println p instanceof Pattern
def matcher = 'foo abc'=~ p

if(!matcher){ // 等价于if(!matcher.find())
    println 'Not found foo'
}else{
    println 'Found foo'
}

/*Output
true
Found foo
*/

3.Match Operator：全字匹配操作符 ==~

import java.util.regex.Pattern
import java.util.regex.Matcher

def pattern = ~/foo/
def p = ~"${pattern}"
println p instanceof Pattern
def matcher = 'foo abc'==~ p

if(!matcher){
    println 'Not found foo'
}else{
    println 'Found foo'
}

/*Output
true
Not found foo
*/