java regex直到某些單詞/文本/字符

Question

請考慮以下文字：

That is, it matches at any position that has a non-word character to the left of it, and a word character to the right of it.

我怎樣才能得到以下結果：

That is, it matches at any position that has a non-word character to the 

直到left這就是一切

Answer 1

input.replace("^(.*?)\\bleft.*$", "$1");

• ^錨定到字符串的開頭
• .*? 盡可能少地匹配任何角色
• \\b匹配單詞邊界
• left匹配字符串文字"left"
• .*匹配字符串的其余部分
• $錨到字符串的末尾
• $1將匹配的字符串替換為()組1

如果你想使用任何單詞（不只是"left" ），小心逃避它。 您可以使用Pattern.quote(word)來轉義字符串。

Answer 2

答案實際上是/(.*)\\Wleft\\w/但它不會匹配任何內容

That is, it matches at any position that has a non-word character to the left of it, and a word character to the right of it.

Answer 3

String result = inputString.replace("(.*?)left.*", "$1");