code: @Override
  	protected Object customKey(Object key) {
  		if (null != key && key instanceof CharSequence) {
  			key = StrUtil.toCamelCase(key.toString());
  		}
  		return key;
  	}
docs: 将Key转为驼峰风格，如果key为字符串的话
  
  @param key KEY
  @return 驼峰Key