正则替换

  String patt = "\\d";        Pattern r = Pattern.compile(patt);Matcher m = r.matcher(s);if (m.find()) {StringBuffer sb = new StringBuffer();for (int i = 0; i < m.end()-m.start(); i++) {sb.append("x");}System.out.println("ReplaceAll:" + m.replaceAll(sb.toString()));}        write(s);