feat: 初始化后端项目基础架构
添加项目基础配置文件和目录结构 实现用户、角色、权限等核心模块的实体类、Mapper接口和服务层 配置数据库连接和MyBatis-Plus支持 添加统一响应格式和异常处理机制
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src/main/java/com/qf/backend/mapper/OrdersMapper.java
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src/main/java/com/qf/backend/mapper/OrdersMapper.java
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package com.qf.backend.mapper;
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import com.baomidou.mybatisplus.core.mapper.BaseMapper;
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import com.qf.backend.entity.Orders;
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/**
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* 订单主表 Mapper 接口
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*/
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public interface OrdersMapper extends BaseMapper<Orders> {
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/**
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* 根据订单号查询订单
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* @param orderNumber 订单号
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* @return 订单信息
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*/
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Orders selectByOrderNumber(String orderNumber);
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}
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