如何使用regex只检索单词

要提取所有单词(包括连字符单词),可以使用

"""\b[a-zA-Z]+(?:-[a-zA-Z]+)*\b""".r.findAllIn(s)

要支持所有Unicode字母,请使用 \p{L} [a-zA-Z]

val s = "This is a nice day, my name is..."
val res = """\b\p{L}+(?:-\p{L}+)*\b""".r.findAllIn(s)
println(res.toList)
// => List(This, is, a, nice, day, my, name, is)

Scala demo

拆分非字母字符串:

val words = text.split("[^-A-Za-z]+")

val p ="""[[a-z][A-Z]]+""".r

回复:

scala> val text = "This is a nice day, my name is..."
text: String = This is a nice day, my name is...

scala> p.findAllIn(text).toArray
res24: Array[String] = Array(This, is, a, nice, day, my, name, is)

scala> val text = "This is a nice_day, my_name is..."
text: String = This is a nice_day, my_name is...

scala> p.findAllIn(text).toArray
res26: Array[String] = Array(This, is, a, nice, day, my, name, is)