Question

如何忽略以下示例中的案例？

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."

Answer 1

要进行不区分大小写的搜索和替换，您可以更改

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

到

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

避免破坏原始大写：

然而，在上述方法中，你破坏了替换词的大写。这是一个更好的建议：

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);

<强>输出：

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

Answer 2

您可以在进行搜索之前将其全部转换为小写，或者查看正则表达式修饰符Pattern.CASE_INSENSITIVE

Answer 3

这是我的方式：

        private String replaceAllIgnoreCase(final String text, final String search, final String replacement){
        if(search.equals(replacement)) return text;
        final StringBuffer buffer = new StringBuffer(text);
        final String lowerSearch = search.toLowerCase(Locale.CANADA);
        int i = 0;
        int prev = 0;
        while((i = buffer.toString().toLowerCase(Locale.CANADA).indexOf(lowerSearch, prev)) > -1){
            buffer.replace(i, i+search.length(), replacement);
            prev = i+replacement.length();
        }
        return buffer.toString();
    }

似乎在我的范围内完美地工作。按我的方式做的好处是我的解决方案中没有正则表达式，这意味着如果你想要替换括号或加号（或任何其他元字符），它实际上将替换文本实际上它的内容是，而不是正则表达式中的含义。希望这有所帮助。

Answer 4

您没有指定语言。

Java有Pattern.CASE_INSENSITIVE

C＃和VB有RegexOptions.IgnoreCase

正则表达式替换所有忽略大小写

4 个答案:

避免破坏原始大写：