Java 使用正则表达式替换单词

可能重复：

我需要将所有出现的索尼爱立信替换为介于两者之间的tilda。这就是我尝试过的

String outText="";
    String inText="Sony Ericsson is a leading company in mobile. The company sony ericsson was found in oct 2001";
    String word = "sony ericsson";
    outText = inText.replaceAll(word, word.replaceAll(" ", "~"));
    System.out.println(outText);

这个的输出是

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

但我想要的是

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

它应该忽略案例并给出所需的输出。

将其更改为

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

使搜索/替换不区分大小写

String outText="";
String inText="Sony Ericsson is a leading company in mobile. " +
              "The company sony ericsson was found in oct 2001";
String word = "sony ericsson";
outText = inText.replaceAll("(?i)" + word, word.replaceAll(" ", "~"));
System.out.println(outText);

输出：

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

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

Pattern.compile("(sony) (ericsson)", Pattern.CASE_INSENSITIVE)
       .matcher(str)
       .replaceAll("$1~$2")

---

避免破坏原始资本： 然而，在上面的方法中，你破坏了被替换单词的大小写。这里有一个更好的建议：

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);

输出：

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

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

Pattern.compile("(sony) (ericsson)", Pattern.CASE_INSENSITIVE)
       .matcher(str)
       .replaceAll("$1~$2")

str.replaceAll（regex，repl）

Pattern.compile（regex）.matcher（str）.replaceAll（repl）

。因此，您可以使用以下命令使matcher不区分大小写：

使用反向引用保留大小写：

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

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

Pattern.compile("(sony) (ericsson)", Pattern.CASE_INSENSITIVE)
       .matcher(str)
       .replaceAll("$1~$2")

给出：

索尼~爱立信是移动领域的领先公司。索尼爱立信公司成立于2001年10月

输出：

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

---

可能重复：@ajoobe:太棒了！我该怎么感谢你伙计？谢谢你约翰的建议这是一个优雅的解决方案！但是，如果

word

变量实际上是一个函数的参数，那么使用它就变得更加困难了。@aioobe谢谢。是的，你是对的；为了使其工作，必须知道要匹配的字符串（

“sony Ericson”

），以便可以定义组（

“（sony）（ericsson）”

）。如果

“sony ericcson”

来自“外部”（例如，函数的外部参数），那么这将很棘手（充其量！）。