Groovy正则表达式复杂逻辑判断实例

下面的两个pattern（p1和p2）分别代表了(A or B) and (C or D)和(A and B) or (C and D)的跨行匹配结果，当然还可以用正则表达式构建更复杂的pattern，但这个实例证明了Groovy具备跨行匹配复杂逻辑表达式的能力。

值得注意的是，多行匹配文本时需要在匹配字符串前加“(?ms)”。

该实例同时演示了Groovy闭包的使用方法。
源代码

msg1 = '''one two three four

five six'''

msg2 = '''Jan Feb Mar

Apr May Jun'''

msg3 = '''one two three

Apr May Jun'''

msg4 = '''Jan Feb Mar

four five six'''

p1 = / (?ms) (two|Feb).*(five|May)/

p2 = / (?ms) (two.five)|(Feb.May)/

msgs = [msg1, msg2, msg3, msg4]

patterns = [p1, p2]

patterns.each { pattern->

println 'pattern is: '+pattern

msgs.each { msg->

println 'msg is: '+msg

println 'match result is:'

matcher = msg =~ pattern

if (matcher)

println "true"

else

println "false"

println '---'

}

println '==='

}
运行结果
pattern is: (?ms)(two|Feb).*(five|May)

msg is: one two three four

five six

match result is:

true

---

msg is: Jan Feb Mar

Apr May Jun

match result is:

true

---

msg is: one two three

Apr May Jun

match result is:

true

---

msg is: Jan Feb Mar

four five six

match result is:

true

---

===

pattern is: (?ms)(two.five)|(Feb.May)

msg is: one two three four

five six

match result is:

true

---

msg is: Jan Feb Mar

Apr May Jun

match result is:

true

---

msg is: one two three

Apr May Jun

match result is:

false

---

msg is: Jan Feb Mar

four five six

match result is:

false

---

===