NotWritablePropertyException: Invalid property 'sessionFactory' of bean class [dao.ProductDao]: Bean property 'sessionFactory' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter? 为什么我会报这个错误啊？
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'productDao' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'productService' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'productDao' while setting bean property 'productDao'; nested exception is
