code: private static String encode(String text, char[][] array) {
  		int len;
  		if ((text == null) || ((len = text.length()) == 0)) {
  			return StrUtil.EMPTY;
  		}
  		StringBuilder buffer = new StringBuilder(len + (len >> 2));
  		char c;
  		for (int i = 0; i < len; i++) {
  			c = text.charAt(i);
  			if (c < 64) {
  				buffer.append(array[c]);
  			} else {
  				buffer.append(c);
  			}
  		}
  		return buffer.toString();
  	}
docs: Encoder
  
  @param text 被编码的文本
  @param array 特殊字符集合
  @return 编码后的字符