code: public static Set<String> getTagSet(String tags) {
  		tags = StringUtils.substringBefore(tags, "\n");
  		String[] tagArr = tags.split("[\\s,，;；]");
  		Set<String> tagSet = new HashSet<String>();
  		for (int i = 0; i < tagArr.length; i++) {
  			String tag = tagArr[i].trim();
  			if (!tag.isEmpty()) {
  				tagSet.add(tag);
  			}
  		}
  		return tagSet;
  	}
docs: Split string to get tag set.
  
  @param tags
  the String of tags to split.
  @return set of tags.