常用正規表示式工具

1、獲取第一個匹配結果

public static String matchFirst(String regex, String source) {
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(source);
        if (matcher.find()) {
            return matcher.group().trim();
        }
        return StringUtils.EMPTY;
    }

2、獲取第一個匹配結果的索引

public static Integer indexFirst(String regex, String source) {
        String matchFirst = matchFirst(regex, source);
        if (StringUtils.isNotBlank(matchFirst)) {
            return source.indexOf(matchFirst);
        } else {
            return -1;
        }
    }

3、獲取所有匹配結果

public static List<String> matchList(String regex, String source) {
        List<String> list = new ArrayList<>();
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(source);
        while (matcher.find()) {
            list.add(matcher.group().trim());
        }
        return list;
    }

4、判斷是否有匹配項

public static Boolean match(String regex, String source) {
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(source);
        return matcher.find();
    }

5、通過正則來切割字串

public static List<String> splitList(String regex, String source) {
        Pattern pattern = Pattern.compile(regex);
        List<String> list = new ArrayList<>();
        for (String item : Arrays.stream(pattern.split(source)).filter(StringUtils::isNotBlank).collect(Collectors.toList())) {
            list.add(item.trim());
        }
        return list;
    }

本作品採用《CC 協議》，轉載必須註明作者和本文連結