1.映射写法如下 

@SelectProvider(type = UserGroupMapper.class, method = "getOrigins")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "groupId", column = "groupId"),
            @Result(property = "resId", column = "resId"),
            @Result(property = "resGroup.id", column = "groupId"),
            @Result(property = "resGroup.name", column = "groupName"),
            @Result(property = "resGroup.type", column = "groupType"),
            @Result(property = "resGroup.orgCode", column = "groupOrgCode"),
            @Result(property = "res.id", column = "resId"),
            @Result(property = "res.orgCode", column = "resOrgCode"),
            @Result(property = "res.name", column = "resName"),
            @Result(property = "res.ipv4", column = "ipv4"),
            @Result(property = "res.ipv6", column = "ipv6"),
            @Result(property = "res.resEdition", column = "resEdition"),
            @Result(property = "res.status", column = "resStatus"),
            @Result(property = "res.domainName", column = "domainName")
    })
    List<ResGroupBindRes> getOrigins(UserGroupQuery query);

2.SQL如下： 

public String getOrigins() {

        StringBuilder sql = new StringBuilder("SELECT rlg.c_id as id, rlg.c_group_id as groupId, rlg.c_res_id as resId, lg.c_name as groupName, lg.c_type as groupType, lg.c_desc as groupDesc, lg.c_org_code as groupOrgCode, r.c_org_code as resOrgCode, r.c_name as resName, r.c_ipv4 as ipv4 " +
                "  FROM t_res_logic_group as rlg " +
                "LEFT JOIN  t_res as r on rlg.c_res_id = r.c_id LEFT JOIN t_logic_group as lg on rlg.c_group_id = lg.c_id ");

        return sql.toString();
    }

 3.映射的对象如下

@Data
public class ResGroupBindRes {

    private String id;
    /* 资源组 */
    private ResGroup resGroup;

    /* 资源 */
    private Res res;

    /* 资源id集合 */
    private String resId;

    /* 组id */
    private String groupId;
}

 4.亲测有效