hibernate联合主键

最新推荐文章于 2021-02-16 07:10:41 发布

原创最新推荐文章于 2021-02-16 07:10:41 发布 · 303 阅读

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本文介绍了一种使用复合主键的Java实体类设计方法，通过@Embeddable注解定义了复合主键类ComposeIdPK，并展示了如何在实体类RoleAuth中使用@Embeddable来引用该复合主键。此外，还提供了增加和查询数据的具体示例。

@Embeddable
public class ComposeIdPK implements Serializable {
    private Long roleId;
    private Long authId;
    @Column(name = "roleId")
    public Long getRoleId() {
        return roleId;
    }

    public void setRoleId(Long roleId) {
        this.roleId = roleId;
    }
    @Column(name = "authId")
    public Long getAuthId() {
        return authId;
    }

    public void setAuthId(Long authId) {
        this.authId = authId;
    }
}

@Entity
@Table(name = "roleauth")
public class RoleAuth implements Serializable {
    private ComposeIdPK composeIdPK;
    @Id
    public ComposeIdPK getComposeIdPK() {
        return composeIdPK;
    }
    public void setComposeIdPK(ComposeIdPK composeIdPK) {
        this.composeIdPK = composeIdPK;
    }
}

=============操作========

增加

                ComposeIdPK composeIdPK=new ComposeIdPK ();
                composeIdPK.setAuthId(authId);
                composeIdPK.setRoleId(roleId());
                RoleAuth roleAuth=new RoleAuth();
                roleAuth.setComposeIdPK(composeIdPK);
                roleAuthManager.save(roleAuth);

查询

Session session = getSession();
List<RoleAuth> roleAuthList = session.createCriteria(RoleAuth.class).add(Restrictions.eq("composeIdPK.roleId", roleId)).list();