hibernate写list到mysql

用jpa写下面语句执行报错，估计要先手动转成字符串吧，工作忙没继续下去了。
    public void persist(Goods goods) {
        Assert.notNull(goods);
//        goods.setId(new Long(1));
        List<GoodsItem> goodsItemList = goods.getGoodsItemList();
 
        String jpql ="update Goods goods set goods.goodsItemList = :p1"+
                "where goods.id =1";
        entityManager.createQuery(jpql).setParameter("p1",goodsItemList).executeUpdate();
    }
看到有直接保存一个类实例的方法，直接拿来用了。

@Transactional
public T update(T entity, String... ignoreProperties) {
   Assert.notNull(entity);
   Assert.isTrue(!entity.isNew());
   Assert.isTrue(!baseDao.isManaged(entity));
 
   T persistant = baseDao.find(baseDao.getIdentifier(entity));
   if (persistant != null) {
      copyProperties(entity, persistant, (String[]) ArrayUtils.addAll(ignoreProperties, UPDATE_IGNORE_PROPERTIES));
   }
   return update(persistant);
}
/********************************一下为原类*********************************/

@Transactional
public abstract class BaseService<T extends BaseEntity<ID>, ID extends Serializable>{
 
   /** 更新忽略属性 */
   private static final String[] UPDATE_IGNORE_PROPERTIES = new String[] { BaseEntity.CREATE_DATE_PROPERTY_NAME, BaseEntity.MODIFY_DATE_PROPERTY_NAME, BaseEntity.VERSION_PROPERTY_NAME };
 
   /** BaseDao */
   private BaseDao<T, ID> baseDao;
 
   @Autowired
   protected void setBaseDao(BaseDao<T, ID> baseDao) {
      this.baseDao = baseDao;
   }
 
   @Transactional(readOnly = true)
   public T find(ID id) {
      return baseDao.find(id);
   }
 
   @Transactional(readOnly = true)
   public List<T> findAll() {
      return findList(null, null, null, null);
   }
 
   @Transactional(readOnly = true)
   public List<T> findList(ID... ids) {
      List<T> result = new ArrayList<T>();
      if (ids != null) {
         for (ID id : ids) {
            T entity = find(id);
            if (entity != null) {
               result.add(entity);
            }
         }
      }
      return result;
   }
 
   @Transactional(readOnly = true)
   public List<T> findList(Integer count, List<Filter> filters, List<Order> orders) {
      return findList(null, count, filters, orders);
   }
 
   @Transactional(readOnly = true)
   public List<T> findList(Integer first, Integer count, List<Filter> filters, List<Order> orders) {
      return baseDao.findList(first, count, filters, orders);
   }
 
   @Transactional(readOnly = true)
   public Page<T> findPage(Pageable pageable) {
      return baseDao.findPage(pageable);
   }
 
   @Transactional(readOnly = true)
   public long count() {
      return count(new Filter[] {});
   }
 
   @Transactional(readOnly = true)
   public long count(Filter... filters) {
      return baseDao.count(filters);
   }
 
   @Transactional(readOnly = true)
   public boolean exists(ID id) {
      return baseDao.find(id) != null;
   }
 
   @Transactional(readOnly = true)
   public boolean exists(Filter... filters) {
      return baseDao.count(filters) > 0;
   }
 
   @Transactional
   public T save(T entity) {
      Assert.notNull(entity);
      Assert.isTrue(entity.isNew());
 
      baseDao.persist(entity);
      return entity;
   }
 
   @Transactional
   public T update(T entity) {
      Assert.notNull(entity);
      Assert.isTrue(!entity.isNew());
 
      if (!baseDao.isManaged(entity)) {
         T persistant = baseDao.find(baseDao.getIdentifier(entity));
         if (persistant != null) {
            copyProperties(entity, persistant, UPDATE_IGNORE_PROPERTIES);
         }
         return persistant;
      }
      return entity;
   }
 
   @Transactional
   public T update(T entity, String... ignoreProperties) {
      Assert.notNull(entity);
      Assert.isTrue(!entity.isNew());
      Assert.isTrue(!baseDao.isManaged(entity));
 
      T persistant = baseDao.find(baseDao.getIdentifier(entity));
      if (persistant != null) {
         copyProperties(entity, persistant, (String[]) ArrayUtils.addAll(ignoreProperties, UPDATE_IGNORE_PROPERTIES));
      }
      return update(persistant);
   }
 
   @Transactional
   public void delete(ID id) {
      delete(baseDao.find(id));
   }
 
   @Transactional
   public void delete(ID... ids) {
      if (ids != null) {
         for (ID id : ids) {
            delete(baseDao.find(id));
         }
      }
   }
 
   @Transactional
   public void delete(T entity) {
      if (entity != null) {
         baseDao.remove(baseDao.isManaged(entity) ? entity : baseDao.merge(entity));
      }
   }
 
   /**
    * 拷贝对象属性
    * 
    * @param source
    *            源
    * @param target
    *            目标
    * @param ignoreProperties
    *            忽略属性
    */
   protected void copyProperties(T source, T target, String... ignoreProperties) {
      Assert.notNull(source);
      Assert.notNull(target);
 
      PropertyDescriptor[] propertyDescriptors = PropertyUtils.getPropertyDescriptors(target);
      for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {
         String propertyName = propertyDescriptor.getName();
         Method readMethod = propertyDescriptor.getReadMethod();
         Method writeMethod = propertyDescriptor.getWriteMethod();
         if (ArrayUtils.contains(ignoreProperties, propertyName) || readMethod == null || writeMethod == null || !baseDao.isLoaded(source, propertyName)) {
            continue;
         }
         try {
            Object sourceValue = readMethod.invoke(source);
            writeMethod.invoke(target, sourceValue);
         } catch (IllegalAccessException e) {
            throw new RuntimeException(e.getMessage(), e);
         } catch (IllegalArgumentException e) {
            throw new RuntimeException(e.getMessage(), e);
         } catch (InvocationTargetException e) {
            throw new RuntimeException(e.getMessage(), e);
         }
      }
   }
 
}