API

@Select: 類似于<select>

@Insert: 類似于<insert>

@Update: 類似于<update>

@Delete: 類似于<delete>?

@Results: 類似于<resultMap>

@Result: 類似于<resultMap>的子標簽

@One: 類似于<association>

@Many: 類似于<collection>

源代碼

DEMO ONE?

public interface UserDao {/*** 用戶的持久層接口* @return*/@Select("select * from user ")@Results({@Result(id=true,property = "id",column = "id"),@Result(property = "name" ,column = "name"),@Result(property = "positions",column ="id" ,javaType = List.class,many=@Many(select="cn.itcast.dao.PositionDao.findById",fetchType= FetchType.LAZY))})List<User> findAll();public interface PositionDao {@Select("select * from position p,(select pid from u_p where uid=#{id}) u where p.id in(u.pid)")@Results({@Result(id=true,property = "id",column = "id"),@Result(property = "name" ,column = "name"),@Result(property = "permissions",column ="id" ,javaType = List.class,many=@Many(select="cn.itcast.dao.PermissionDao.findById",fetchType= FetchType.LAZY))})List<Position> findById(); } public interface PermissionDao {@Select("select * from permission p,(select prid from ps_pr where psid=#{id}) u where p.id in (u.prid) ")@Results({@Result(id=true,property = "id",column = "id"),@Result(property = "name" ,column = "name")})List<Permission> findById(); }

DEMO TWO

public interface ResourceMapper {@Select("SELECT * FROM resource")@Results(value = {@Result(property = "id",column = "id",id = true),@Result(property = "pattern",column = "pattern"),@Result(property = "roles",column = "id",javaType = List.class,many = @Many(select = "club.zstuca.myzstu.mapper.RoleMapper.loadRolesByResourceId",fetchType = FetchType.LAZY))})List<Resource> getAllResource(); } public interface RoleMapper {@Select("SELECT * FROM role WHERE id=#{id}")Role loadRolesById(String id);@Select("SELECT * FROM resource_role rr LEFT JOIN role r ON rr.rid=r.id WHERE rr.sid=#{resourceId}")List<Role> loadRolesByResourceId(String resourceId); }

參考文章

https://blog.csdn.net/desert568/article/details/79079151

http://bbs.itheima.com/thread-440927-1-1.html

https://zhuanlan.zhihu.com/p/66919945

https://blog.csdn.net/qq_42524262/article/details/97664924

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