Hibernate 异常：org.hibernate.LazyInitializationException: failed to lazily initial

Hibernate 错误：org.hibernate.LazyInitializationException: failed to lazily initial
有两张多对多关联表：

@Entity@AccessType("field")@Table(name="ROLE")public class Role implements Serializable {private static final long serialVersionUID = 1L;@Id@Column(name="role_id")private Long roleId;@Column(name="role_Name")private String roleName;/**      * 角色-菜单关联       */      @ManyToMany(cascade={CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.LAZY)@JoinTable(name = "ROLE_MENU", joinColumns = { @JoinColumn(name = "role_id") }, inverseJoinColumns = { @JoinColumn(name = "menu_id") })      private Set<Menu> menus = new LinkedHashSet<Menu>();    public Set<Menu> getMenus() {return menus;}public void setMenus(Set<Menu> menus) {this.menus = menus;}}

注意：一定要两张表分别@JoinTable(name = "ROLE_MENU")

在Role在引用menus的时候，报：org.hibernate.LazyInitializationException: failed to lazily initial

解决办法：roleDao.getHibernateTemplate().initialize(role.getMenus());


当关联表中不存在此记录时，role.getMenus();将会报错：org.hibernate.ObjectNotFoundException: No row with the given identifier exists:

解决办法：加上 @NotFound(action = NotFoundAction.IGNORE)

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