mybaitis plus 多表联合查询并举例

好的，对于mybatis plus多表联合查询，你可以使用@Join注解来实现，具体可以参考以下代码示例：

@TableName("user")
public class User {
    @TableId
    private Long id;
    private String name;
    private Integer age;
    private String email;
}

@TableName("order")
public class Order {
    @TableId
    private Long id;
    private String orderNo;
    private Long userId;
}

@Data
public class UserOrder {
    private Long userId;
    private String name;
    private String email;
    private List<Order> orderList;
}

public interface UserMapper extends BaseMapper<User> {
    @Select("select u.id as userId, u.name, u.email, o.id as orderId, o.order_no from user u " +
            "left join order o on u.id = o.user_id " +
            "where u.id = #{userId}")
    List<UserOrder> selectUserOrders(@Param("userId") Long userId);
}

这样，你就可以使用mybatis plus来实现多表联合查询了。