关于mybatis plus 中 MetaObjectHandler 自动填充功能出现的问题及处理

/**
* 插入使用
*/
    @Override
    public void insertFill(MetaObject metaObject) {
        String operator = "bokai";
        fillValue(metaObject, CREATED_BY, () -> operator);
        fillValue(metaObject, UPDATED_BY, () -> operator);
        fillValue(metaObject, CREATED_DATE, () -> getDateValue(metaObject.getSetterType(CREATED_DATE)));
        fillValue(metaObject, UPDATED_DATE, () -> getDateValue(metaObject.getSetterType(UPDATED_DATE)));
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        String operator = "bokai";
        fillValue(metaObject, "et."+UPDATED_BY, () -> operator);
        fillValue(metaObject, "et."+UPDATED_DATE, () -> getDateValue(metaObject.getSetterType("et."+UPDATED_DATE)));
    }
private void fillValue(MetaObject metaObject, String fieldName, Supplier<Object> valueSupplier) {
        if (!metaObject.hasGetter(fieldName)) {
            return;
        }
        Object sidObj = metaObject.getValue(fieldName);
        if (sidObj == null && metaObject.hasSetter(fieldName) && valueSupplier != null) {
            setFieldValByName(fieldName, valueSupplier.get(), metaObject);
        }
    }

    private Object getDateValue(Class<?> setterType) {
        if (Date.class.equals(setterType)) {
            return new Date();
        } else if (LocalDateTime.class.equals(setterType)) {
            return LocalDateTime.now();
        }
        return null;
    }