1、

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2、

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save和saveOrUpdateAll

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public Object executeWithNativeSession(HibernateCallback action) {
        return doExecute(action, false, true);
    }

protected Object doExecute(HibernateCallback action, boolean enforceNewSession, boolean enforceNativeSession)
            throws DataAccessException {

        Assert.notNull(action, "Callback object must not be null");

        Session session = (enforceNewSession ?
                SessionFactoryUtils.getNewSession(getSessionFactory(), getEntityInterceptor()) : getSession());
        boolean existingTransaction = (!enforceNewSession &&
                (!isAllowCreate() || SessionFactoryUtils.isSessionTransactional(session, getSessionFactory())));
        if (existingTransaction) {
            logger.debug("Found thread-bound Session for HibernateTemplate");
        }

        FlushMode previousFlushMode = null;
        try {
            previousFlushMode = applyFlushMode(session, existingTransaction);
            enableFilters(session);
            Session sessionToExpose =
                    (enforceNativeSession || isExposeNativeSession() ? session : createSessionProxy(session));
            Object result = action.doInHibernate(sessionToExpose);
            flushIfNecessary(session, existingTransaction);
            return result;
        }
        catch (HibernateException ex) {
            throw convertHibernateAccessException(ex);
        }
        catch (SQLException ex) {
            throw convertJdbcAccessException(ex);
        }
        catch (RuntimeException ex) {
            // Callback code threw application exception...
            throw ex;
        }
        finally {
            if (existingTransaction) {
                logger.debug("Not closing pre-bound Hibernate Session after HibernateTemplate");
                disableFilters(session);
                if (previousFlushMode != null) {
                    session.setFlushMode(previousFlushMode);
                }
            }
            else {
                // Never use deferred close for an explicitly new Session.
                if (isAlwaysUseNewSession()) {
                    SessionFactoryUtils.closeSession(session);
                }
                else {
                    SessionFactoryUtils.closeSessionOrRegisterDeferredClose(session, getSessionFactory());
                }
            }
        }
    }

4、

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