code: public Set<String> findSensitiveWord(String txt , MatchType matchType){
  		Set<String> sensitiveWordList = new HashSet<String>();
  		for(int i = 0 ; i < txt.length() ; i++){
  			int length = checkSensitiveWord(txt, i, matchType);    //判断是否包含敏感字符
  			if(length > 0){    //存在,加入list中
  				sensitiveWordList.add(txt.substring(i, i+length));
  				i = i + length - 1;    //减1的原因，是因为for会自增
  			}
  		}
  		return sensitiveWordList;
  	}
docs: 获取文字中的敏感词
  @param txt 文字
  @param matchType 匹配规则&nbsp;1：最小匹配规则，2：最大匹配规则
  @return
  @version 1.0