自定义 Java 正则表达式：匹配开头和结尾

Question

我已经为此苦苦挣扎了几天，我想知道也许有人可以帮助我。我想要完成的是处理一个包含一组问题和答案的文本文件。文件的内容（.doc 或 .docx）如下所示：Document Name1. Question one:a. Answer one to question oneb. Answer two to question onec. Answer three to question one2. Question two:a. Answer one to question twoc. Answer two to question twoe. Answer three to question two到目前为止我尝试过的是：通过 Apache POI 读取文档内容，如下所示：fis = new FileInputStream(new File(FilePath));XWPFDocument doc = new XWPFDocument(fis);XWPFWordExtractor extract = new XWPFWordExtractor(doc);String extractorText = extract.getText();所以，到目前为止，我已经掌握了文档的内容。接下来，我尝试创建一个正则表达式模式，该模式将匹配问题开头的数字和点（1. , 12.）并继续直到它与冒号匹配：Pattern regexPattern = Pattern.compile("^(\\d|\\d\\d)+\\.[^:]+:\\s*$", Pattern.MULTILINE);Matcher regexMatcher = regexPattern.matcher(extractorText);但是，当我尝试遍历结果集时，我找不到任何问题文本：while (regexMatcher.find()) {    System.out.println("Found");    for (int i = 0; i < regexMatcher.groupCount() - 2; i += 2) {        map.put(regexMatcher.group(i + 1), regexMatcher.group(i + 2));        System.out.println("#" + regexMatcher.group(i + 1) + " >> " + regexMatcher.group(i + 2));    }}由于我是 Java 新手，我不确定我哪里出错了，希望有人能帮助我。此外，如果有人有更好的方法来创建带有问题和相关答案的地图，我们将不胜感激。先感谢您。编辑：我正在尝试获取类似 Map 的内容，其中将包含键（问题文本）和另一个字符串列表，这些字符串将表示与该问题相关的一组答案，例如：Map<String, List<String>> desiredResult = new HashMap<>();    desiredResult.entrySet().forEach((entry) -> {        String       questionText = entry.getKey();        List<String> answersList  = entry.getValue();        System.out.println("Now at question: " + questionText);        answersList.forEach((answerText) -> {            System.out.println("Now at answer: " + answerText);        });    });这将生成以下输出：Now at question: 1. Question one:Now at answer: a. Answer one to question oneNow at answer: b. Answer two to question oneNow at answer: c. Answer three to question one