HibernateTemplate of Hibernate

when practicing ssh framework integration, implement a function: add data from a local excel table to the database and display it on the page. The result shows an error:
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove "readOnly" marker from transaction definition.
Baidu"s solution is a variety of read-only= "false", as follows: 

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <!--   :-->
        <tx:method name="save" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
        <tx:method name="update" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
        <tx:method name="delete" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
        <tx:method name="find*" isolation="DEFAULT" propagation="REQUIRED" rollback-for="BuyStockException"/>
    </tx:attributes>
</tx:advice>

@ Transactional (readOnly = false, propagation = Propagation.REQUIRES_NEW)
public interface BaseDao < T > {}

and so on.

it is a pity that the report is still wrong. I would like to ask all the bosses for an answer.

hibernate version: 4.3.11

Java
Mar.03,2021 
:""  
Service:
public class UserServiceImpl implements UserService {
    @Resource
    public void setUserDao(UserDao userDao) {}
    public UserDao getUserDao() {}
    public void save(User user) {}
    public void update(User user) {}
    public void delete(Serializable id) {}
    public User findObjectById(Serializable id) {}
    public List<User> findObjects() {}
    public void exportExcel(List<User> userList, ServletOutputStream outputStream) {}
    public void importExcel(File userExcel, String userExcelFileName) {
        for(User user : ImportExcelUtil.importExcel(userExcel,userExcelFileName)) {
            save(user);
        }
    }  
}

save();
importExcel()save();
importExcel()Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.

Service

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