code: public static boolean isQuoteBy(CharSequence cs, char lc, char rc) {
          if (null == cs)
              return false;
          int length = cs.length();
          return length > 1 && cs.charAt(0) == lc && cs.charAt(length - 1) == rc;
      }
docs: 测试此字符串是否被指定的左字符和右字符所包裹
  
  @param cs
  字符串
  @param lc
  左字符
  @param rc
  右字符
  @return 字符串是被左字符和右字符包裹