Invalid property 'packagesToScan' of bean class [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]

Question

I have tried to find the solution, but still no luck.

I am following the book "Pro Spring 3" (Appress) [page 351]

I have generated the project as jpa project.

As far as I understand I can either use persistence.xml or can manage it internally in the bean, which is what I want.

For the latest we need to define packagesToScan property.

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaPersonService': Injection of persistence dependencies failed; nested exception is 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'emf' defined in class path resource [META-INF/app-context.xml]: Error setting property values; nested exception 
is **org.springframework.beans.NotWritablePropertyException: Invalid property 'packagesToScan' of bean class [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Bean property 'packagesToScan' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

When I try to ask for suggestions (ctrl+space) , it does not have packagesToScan property.

What am I missing?

Answer 1

'packagesToScan' property was added in Spring 3.1 (compare 3.0 and 3.1).

Make sure you are including the newest 3.1 Spring JARs in your CLASSPATH.