code: public static String getLocalHostName() {
  		try {
  			InetAddress addr = InetAddress.getLocalHost();
  			return addr.getHostName();
  		} catch (UnknownHostException e) {
  			e.printStackTrace();
  		}
  		return null;
  	}
docs: @func 获得本机的机器名称，用来从配置文件中排除本机
  @desc 在此添加实现相关说明
  
  @author zhangfeng
  @version 4.0.0.0