<filter>
        <filter-name>OpenEntityManagerInViewFilter</filter-name>
        <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>OpenEntityManagerInViewFilter</filter-name>
        <servlet-name>spring</servlet-name>
    </filter-mapping>

@Entity
public class Cat
{
    ...
    @ManyToOne(fetch = FetchType.LAZY, optional = false)
    private Person master;
    ...
}

@Controller
public class CatController {

    @PersistenceContext
    protected EntityManager entityManager;

    @RequestMapping("/cat")
    public ModelAndView cat() {
      ModelAndView mav = new ModelAndView("cat");
      Cat cat = entityManager.find(Cat.class, 1);
      mav.addObject(cat);
      return mav;
    }

}

${cat.master}