springboot开发读取信息得到商品列表

最新推荐文章于 2024-06-28 07:43:02 发布

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最新推荐文章于 2024-06-28 07:43:02 发布

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分类专栏：后端 springboot java

本文链接：https://blog.youkuaiyun.com/qq_37828633/article/details/86804314

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这是一个关于SpringBoot项目中使用MyBatis实现从数据库读取商品列表的示例。ItemDOMapper接口定义了数据库操作，ItemServiceImpl实现了商品的创建和查询，ItemController处理HTTP请求并返回响应。

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ItemDOMapper.java

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package com.miaoshaproject.dao;

import java.util.List;

import com.miaoshaproject.dataobject.ItemDO;

public interface ItemDOMapper {
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
List<ItemDO> listItem();
int deleteByPrimaryKey(Integer id);

/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
int insert(ItemDO record);

/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
int insertSelective(ItemDO record);

/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
ItemDO selectByPrimaryKey(Integer id);

/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
int updateByPrimaryKeySelective(ItemDO record);

/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table item
*
* @mbg.generated
*/
int updateByPrimaryKey(ItemDO record);
}

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ItemServiceImpl.java

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package com.miaoshaproject.service.impl;

import java.math.BigDecimal;
import java.util.List;
import java.util.stream.Collector;
import java.util.stream.Collectors;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.miaoshaproject.dao.ItemDOMapper;
import com.miaoshaproject.dao.ItemStockDOMapper;
import com.miaoshaproject.dataobject.ItemDO;
import com.miaoshaproject.dataobject.ItemStockDO;
import com.miaoshaproject.error.BusinessException;
import com.miaoshaproject.error.EmBusinessError;
import com.miaoshaproject.service.ItemService;
import com.miaoshaproject.service.model.ItemModel;
import com.miaoshaproject.validator.ValidationResult;
import com.miaoshaproject.validator.ValidatorImpl;

@Service
public class ItemServiceImpl implements ItemService {
   @Autowired
   private ValidatorImpl validator;

   @Autowired
   private ItemDOMapper itemDOMapper;

   @Autowired
   private ItemStockDOMapper itemStockDOMapper;

   public List<ItemModel> listItem(){
       List<ItemDO> itemDOList=itemDOMapper.listItem();
       List<