UnsatisfiedDependencyException: Error creating bean with name - spring

Question

i'm trying to create db server on Spring, and looked through a lot of similar questions, but no one answer to them can't help me. I can't solve this Error:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'groupController': Unsatisfied dependency expressed through field 'gs'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'groupServiceImpl': Unsatisfied dependency expressed through field 'gr'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'groupRepository': Cannot create inner bean '(inner bean)#1a3c15e0' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#1a3c15e0': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
So here's my classes :
GroupController.java
#RestController
public class GroupController {
#Autowired
private GroupService gs;
#RequestMapping(value = "/groups", method = RequestMethod.GET)
#ResponseBody
public List<Group> getAllGroups(){
// return mocklist();
return gs.getAll();
}
private List<Group> mocklist() {
Group g= new Group();
g.setId(1);
g.setGroupName("333");
g.setTutorName("shcefsa");
List<Group> list = new ArrayList<Group>();
list.add(g);
g.setId(2);
g.setGroupName("333");
g.setTutorName("shc321efsa");
list.add(g);
return list;
}
#RequestMapping(value = "/groups/{id}", method = RequestMethod.GET)
#ResponseBody
public Group getGroupById(#PathVariable("id") int groupId){
return gs.getById(groupId);
}
#RequestMapping(value = "/groups", method = RequestMethod.POST)
#ResponseBody
public Group addGroup(#RequestBody Group group){
return gs.add(group);
}
#RequestMapping(value = "/groups", method = RequestMethod.POST)
#ResponseBody
public Group updateGroup(#RequestBody Group group){
return gs.add(group);
}
#RequestMapping(value = "/groups/{id}", method = RequestMethod.POST)
#ResponseBody
public void deleteGroup(#PathVariable("id") int groupId){
gs.deleteById(groupId);
}
}
GroupRepository.java
#Repository
public interface GroupRepository extends JpaRepository<Group, Integer> {
}
GroupService.java
#Service
public interface GroupService {
List<Group> getAll();
Group getById(int id);
Group add(Group group);
void deleteById(int id);
}
GroupServiceImpl.java`
#Service
public class GroupServiceImpl implements GroupService {
#Autowired
private GroupRepository gr;
public List<Group> getAll() {
return gr.findAll();
}
public Group getById(int id) {
return gr.findOne(id);
}
public Group add(Group group) {
return gr.save(group);
}
public void deleteById(int id) {
gr.delete(id);
}
Looking at other answers, it seems that everything is fine, but it's obvious that there's an error. Hope you'll help me
UPDATE
Databaseconfig.java
#Configuration
#EnableJpaRepositories("com.homestudio.tutor.server.repository")
#EnableTransactionManagement
#PropertySource("classpath:db.properties")
#ComponentScan("com.homestudio.tutor.server")
public class DatabaseConfig {
#Resource
private Environment env;
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(){
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(env.getRequiredProperty("db.entity.package"));
em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
em.setJpaProperties(getHibernateProperties());
return em;
}
#Bean
public PlatformTransactionManager platformTransactionManager(){
JpaTransactionManager manager = new JpaTransactionManager();
manager.setEntityManagerFactory(entityManagerFactoryBean().getObject());
return manager;
}
#Bean
public DataSource dataSource(){
BasicDataSource ds = new BasicDataSource();
ds.setUrl(env.getRequiredProperty("db.url"));
ds.setDriverClassName(env.getRequiredProperty("db.driver"));
ds.setUsername(env.getRequiredProperty("db.username"));
ds.setPassword(env.getRequiredProperty("db.password"));
ds.setInitialSize(Integer.valueOf(env.getRequiredProperty("db.initialSize")));
ds.setMinIdle(Integer.valueOf(env.getRequiredProperty("db.minIdle")));
ds.setMaxIdle(Integer.valueOf(env.getRequiredProperty("db.maxIdle")));
ds.setTimeBetweenEvictionRunsMillis(Long.valueOf(env.getRequiredProperty("db.timeBetweenEvictionRunsMilles")));
ds.setMinEvictableIdleTimeMillis(Long.valueOf(env.getRequiredProperty("db.minEvictableIdleTimeMilles")));
ds.setTestOnBorrow(Boolean.valueOf(env.getRequiredProperty("db.testOnBorrow")));
ds.setValidationQuery(env.getRequiredProperty("db.validationQuery"));
return ds;
}
public Properties getHibernateProperties() {
try {
Properties properties = new Properties();
InputStream is = getClass().getClassLoader().getResourceAsStream("hibernate.properties");
properties.load(is);
return properties;
} catch (IOException e) {
throw new IllegalArgumentException("Cannot find file \"hibernate.properties\" in classpath");
}
}
}
WebConfig.java
#Configuration
#EnableWebMvc
#ComponentScan("com.homestudio.tutor.server")
public class WebConfig extends WebMvcConfigurerAdapter{
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setObjectMapper(new ObjectMapper());
converter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
converters.add(converter);
}
}