hibernate 中映射關係的介紹

實體類User 中字段的名稱：

private Organization organization;// 所屬機構，要對應映射

private Set<Role> roles; // 擁有角色， 要與對應映射

@ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "org_id", nullable = false)
    public Organization getOrganization() {
        return organization;
    }

@ManyToMany(targetEntity = Role.class, fetch = FetchType.LAZY, cascade = CascadeType.MERGE)
    @JoinTable(name = "SYS_USER_ROLES", schema = "UAWP", joinColumns = { @JoinColumn(name = "user_id") }, inverseJoinColumns = { @JoinColumn(name = "role_id") })
    @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
    public Set<Role> getRoles() {
        if (roles == null) {
            roles = new HashSet<Role>(4);
        }
        return roles;
    }

實體類中Organization 中字段名稱：

    private Set<User> users;// 用戶名稱

@OneToMany(mappedBy="organization", fetch=FetchType.LAZY, cascade=CascadeType.MERGE)
    @Where(clause="f_disabled='F' and f_removed='F'")
    @OrderBy("order")
    @Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
    public Set<User> getUsers() {
        if(users == null) {
            users = new LinkedHashSet<User>();
        }
        return users;
    }

實體類Role 中字段：

/** 該角色的用戶 */
    private Set<User> users;

 @ManyToMany(mappedBy="roles", fetch=FetchType.LAZY)
    @Where(clause="f_disabled='F' and f_removed='F'")
    @OrderBy("order")
    public Set<User> getUsers() {
        if(users == null) {
            users = new HashSet<User>();
        }
        return users;
    }