/** * 数字替换，适当位置加- */public static void main(String[] args) { String regex = "^(\\d{2})(\\d)(\\d{4})(\\d{4})(\\d)$"; String test = "121123412344"; System.out.println("是否匹配(true/false)：" + Pattern.compile(regex).matcher(test).matches()); System.out.println(test.replaceAll(regex, "$1-$2-$3-$4-$5"));}输出：
是否匹配(true/false)：true12-1-1234-1234-4
转载于:https://www.cnblogs.com/mucheng/p/9020634.html
