java - 使用正则表达式更新保留字(有异常(exception))

Question

在 Java 8 中使用此正则表达式，考虑到这些限制，我想将我的保留字更新为大写:

• 仅将空格之间或句子开头/结尾的保留字大写
• 如果是在圆括号或方括号中，如果不包含在单词中，也更新它
• 不要更新包含在单词中或连字符后的保留字

我的代码:

String[] RESERVED_WORDS = { "id", "url" };
String[] result = {"id report with report-id is in the url but not in the identifier (id)"};
Arrays.stream(RESERVED_WORDS).forEach(word -> result[0] = result[0].replaceAll("(\\b" + word + "\\b", word.toUpperCase()));

我的结果:

ID report with report-ID is in the URL but not in the identifier (id)

我的期望:

ID report with report-id is in the URL but not in the identifier (ID)

除了连字符后的那个，我已经处理了所有的异常，你有改进我的代码的想法吗？

Answer 1

你可以使用

String[] RESERVED_WORDS = { "id", "url" };
String[] result = {"id report with report-id is in the url but not in the identifier (id)"};
Arrays.stream(RESERVED_WORDS).forEach(word -> result[0] = result[0].replaceAll("(?i)(?<![\\w-])" + Pattern.quote(word) + "(?![\\w-])", word.toUpperCase()));
System.out.println(result[0]); 

参见 online demo ，输出:

ID report with report-id is in the URL but not in the identifier (ID)

"(?i)(?<![\\w-])" + Pattern.quote(word) + "(?![\\w-])"部分创建一个 regex like (?i)(?<![-\w])id(?![-\w])匹配 id以不区分大小写的方式(由于 (?i) 嵌入标志选项)不以 - 开头或任何单词 char，并且后面没有 -或任何字符字符。