code: public static Map<String, Object> beanToMap(Object bean, boolean isToUnderlineCase, boolean ignoreNullValue) {
  		return beanToMap(bean, new LinkedHashMap<String, Object>(), isToUnderlineCase, ignoreNullValue);
  	}
docs: 对象转Map
  
  @param bean bean对象
  @param isToUnderlineCase 是否转换为下划线模式
  @param ignoreNullValue 是否忽略值为空的字段
  @return Map