正则表达式替换所有忽略大小写 [英] regex replace all ignore case

问题描述

如何忽略以下示例中的大小写？

How do I ignore case in the below example?

outText = inText.replaceAll(word, word.replaceAll(" ", "~"));

示例：

输入：

inText = "Retail banking Wikipedia, the free encyclopedia Retail banking "
       + "From Wikipedia. retail banking industry."

word   = "retail banking"

输出

outText = "Retail~banking Wikipedia, the free encyclopedia Retail~banking " +
          "From Wikipedia. retail~banking industry."

推荐答案

要进行不区分大小写的搜索和替换，您可以更改

To do case-insensitive search and replace, you can change

outText = inText.replaceAll(word, word.replaceAll(" ", "~"));

进入

outText = inText.replaceAll("(?i)" + word, word.replaceAll(" ", "~"));

---

避免破坏原始大写：

然而，在上述方法中，您将破坏被替换单词的大小写。这是一个更好的建议：

---

Avoid ruining the original capitalization:

In the above approach however, you're ruining the capitalization of the replaced word. Here is a better suggestion:

String inText="Sony Ericsson is a leading company in mobile. " +
              "The company sony ericsson was found in oct 2001";
String word = "sony ericsson";

Pattern p = Pattern.compile(word, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(inText);

StringBuffer sb = new StringBuffer();

while (m.find()) {
  String replacement = m.group().replace(' ', '~');
  m.appendReplacement(sb, Matcher.quoteReplacement(replacement));
}
m.appendTail(sb);

String outText = sb.toString();

System.out.println(outText);

输出：

Sony~Ericsson is a leading company in mobile.
The company sony~ericsson was found in oct 2001

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