字符串过滤指定字符串

 public static String getSubString(String str1, String str2) {
        StringBuffer sb = new StringBuffer(str1);
        while (true) {
            int index = sb.indexOf(str2);
            if (index == -1) {
                break;
            }
            sb.delete(index, index + str2.length());
        }
        return sb.toString();
    }