常用正则(持续更新)

记录自己平常写的一些正则,有问题欢迎指出

   /**  
     *  如text:123456,seat:**, return 12**56
     * 需要注意 text和seat的长度,text长度<seat长度加2会直接返回text
     * @param text 原字符串
     * @param seat 需要替换的字符 如:****
     * @return 替换后的字符串
     */
    public static String hideString(String text, String seat) {
        String hidePhone;
        int length = text.length();
        if (length < seat.length() + 2) {
            hidePhone = text;
        } else {
            int leftCount = (length - seat.length()) / 2;
            int rightCount = length - seat.length() - leftCount;
            String regex = "(.{" + leftCount + "}).{" + seat.length() + "}(.{" + rightCount + "})";
            hidePhone = text.replaceAll(regex, "$1" + seat + "$2");
        }
        return hidePhone;
    }