code: public Setting getSetting(String name) {
  		String nameForProfile = fixNameForProfile(name);
  		Setting setting = settingMap.get(nameForProfile);
  		if (null == setting) {
  			setting = new Setting(nameForProfile, this.charset, this.useVar);
  			settingMap.put(nameForProfile, setting);
  		}
  		return setting;
  	}
docs: 获取当前环境下的配置文件
  
  @param name 文件名，如果没有扩展名，默认为.setting
  @return 当前环境下配置文件