code: public void store(String absolutePath) {
  		PrintWriter writer = null;
  		try {
  			writer = FileUtil.getPrintWriter(absolutePath, charset, false);
  			store(writer);
  		} catch (IOException e) {
  			throw new IORuntimeException(e, "Store Setting to [{}] error!", absolutePath);
  		} finally {
  			IoUtil.close(writer);
  		}
  	}
docs: 持久化当前设置，会覆盖掉之前的设置<br>
  持久化会不会保留之前的分组
  
  @param absolutePath 设置文件的绝对路径