java 正则表达式匹配${xxx}

public static void main(String[] a) {
        // 待处理字符串
        String wpp = "jdbc:mysql://${wpp1}:${wpp2}/${wpp3}?&useSSL=false&characterEncoding=utf-8&serverTimezone=Asia/Shanghai&zeroDateTimeBehavior=convertToNull";
        //u0024u007Bu0028u002Eu002Au003Fu0029}
        // 匹配方式
        Pattern p = Pattern.compile("\$\{(.*?)}");
        // 匹配】
        Matcher matcher = p.matcher(wpp);
        // 处理匹配到的值
        while (matcher.find()) {
            System.out.println("woo: " + matcher.group());
        }
    }