java - 使正则表达式在 Windows 和 Linux 上兼容

Question

我有以下正则表达式: ".*(?=\\b)"+ Pattern.quote(key)+ "(?<=\\b).*"这个正则表达式在 Windows 上工作正常，但在 Linux 上不行。我怎样才能让这个正则表达式在 Windows 和 Linux 上都工作

整个代码是

    List<String> mapKeyList = new ArrayList<String>(myPropMapKeys.keySet());
    List<String> matchFileList = new ArrayList<>();

    Predicate<String> p = (str) -> mapKeyList.stream().anyMatch(key -> str.matches(".*\\b" + Pattern.quote(key) + "\\b.*")); //To make this regex work on linux

    if (listOfIncludedFiles.length > 0) {
        System.out.println("Files that contains key are:: ");
        for (String myFile : listOfIncludedFiles) {
            File in = new File(myFile);
            InputStreamReader r = new InputStreamReader(new FileInputStream(in));
            String mycharset = r.getEncoding();
            Charset toBePassedCharset = Charset.forName(mycharset);
            try (Stream<String> stream = Files.lines(Paths.get(myFile), toBePassedCharset)) {
                // try (Stream<String> stream =
                // Files.lines(Paths.get(myFile))) {
                boolean foundAKey = stream.anyMatch(p);
                if (foundAKey) {
                    matchFileList.add(myFile);

                    // Listing the files that have match
                    System.out.println("**" + ROOT_PATH + File.separator + myFile);
                }
            }

            catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        System.out.println("Total Number of files with matches:: " + matchFileList.size());
    }

正则表达式 Predicate<String> p = (str) -> mapKeyList.stream().anyMatch(key -> str.matches(".*(?=\b)" + Pattern.quote(key) + "(?<=\b).*"));无法在 Linux 上运行。

我的示例字符串是“{{LOGGER}}”

Answer 1

i am looking for boundaries of { and }

那么你应该使用

Pattern.compile("(?<!\\{)" + Pattern.quote(key) + "(?!\\})").matcher(str).find()

而不是matches与 \b单词边界。

(?<!\{)如果当前位置前面带有{，则负向查找失败匹配失败和 (?!\})如果存在 } 则负向前瞻将导致匹配失败就在当前位置之后。