code: public static String getShortClassName(String className) {
  		final List<String> packages = StrUtil.split(className, CharUtil.DOT);
  		if (null == packages || packages.size() < 2) {
  			return className;
  		}
  
  		final int size = packages.size();
  		final StringBuilder result = StrUtil.builder();
  		result.append(packages.get(0).charAt(0));
  		for (int i = 1; i < size - 1; i++) {
  			result.append(CharUtil.DOT).append(packages.get(i).charAt(0));
  		}
  		result.append(CharUtil.DOT).append(packages.get(size - 1));
  		return result.toString();
  	}
docs: 获取完整类名的短格式如：<br>
  cn.hutool.core.util.StrUtil -》c.h.c.u.StrUtil
  
  @param className 类名
  @return 短格式类名
  @since 4.1.9