【SpringBoot二手交易系统全解析】从0到1搭建你的专属平台！

🔍 需求确认：沟通对接 🗣

💬 在项目启动初期，我通过多次线上会议和需求文档，与客户深入交流，明确了系统需要支持的核心功能：商品分类、二手商品展示、订单处理、取消购买、收发货管理、配送跟踪、留言反馈及系统设置等。📝

📊 系统功能结构：附思维导图

思维导图，展示各模块间的逻辑关系，从用户界面到后台管理，层层递进！

☆开发技术：

1、环境

（1）运行环境：java jdk 1.8，node 14。

（2）IDE环境：IDEA或者Eclipse; Visual Studio Code 或 WebStorm 均可；

（3）硬件环境：windows 10/11 或者 Mac OS；

（4）数据库：MySql 5.7/8.0版本均可；

（5）Maven项目：maven 3.6;

2、技术栈

后台：SpringBoot + Mybatis-plus + Mybatis + lombok插件等

前台：Vue + Vue Router + ELementUI + Axios 等

3、使用说明

先启动后端再启动前端

4、后端：

（1）使用Navicat或者idea自带的数据库工具，在mysql中创建对应sql文件名称的数据库，并导入项目的sql文件；

（2）使用IDEA/Eclipse导入后端项目，导入成功后执行maven clean;maven install命令，然后运行；

（3）将项目中application.yml配置文件中的数据库配置改为自己的配置;

（4）运行项目，后端运行成功后再运行前端项目；

5、前端:

（1）安装好node及npm，通过命令node -v和npm -v 查看安装是否成功；

（2）在Visual Studio Code 或 WebStorm 中打开front所在路径；

（3）命令行执行npm run serve启动项目；

🛠 系统功能：运行截图展示

商品分类管理：灵活添加、编辑、删除分类，让商品井井有条！（图2）

二手商品管理：上传商品图片、详情，轻松管理库存，让二手好物找到新家！（图3）

订单信息管理：实时查看订单状态，处理退款、发货等操作，交易更顺畅！（图4）

取消购买管理：用户友好界面一键取消订单，系统自动处理退款流程，确保交易灵活无忧！（图5）

收货信息管理：用户可保存多个收货地址，购物时快速选择，收货更便捷；商家端清晰查看收货详情，发货不出错！（图6）

留言反馈系统：搭建用户与商家沟通的桥梁，无论是咨询商品详情还是售后问题，都能得到及时响应，提升用户满意度！（图7）

图

💾 数据库设计：附ER图

ER图，展示了用户、商品、订单等实体间的关系，确保数据的一致性和完整性。

💻 核心代码：展示技术亮点 🔥

核心代码：

package com.cl.controller;import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;import com.cl.utils.ValidatorUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.cl.annotation.IgnoreAuth;import com.cl.entity.ShangpinxinxiEntity;
import com.cl.entity.view.ShangpinxinxiView;import com.cl.service.ShangpinxinxiService;
import com.cl.service.TokenService;
import com.cl.utils.PageUtils;
import com.cl.utils.R;
import com.cl.utils.MPUtil;
import com.cl.utils.CommonUtil;
import java.io.IOException;
import com.cl.service.StoreupService;
import com.cl.entity.StoreupEntity;/*** 商品信息* 后端接口* @author * @email * @date 2024-03-19 00:30:59*/
@RestController
@RequestMapping("/shangpinxinxi")
public class ShangpinxinxiController {@Autowiredprivate ShangpinxinxiService shangpinxinxiService;@Autowiredprivate StoreupService storeupService;/*** 后端列表*/@RequestMapping("/page")public R page(@RequestParam Map<String, Object> params,ShangpinxinxiEntity shangpinxinxi,HttpServletRequest request){String tableName = request.getSession().getAttribute("tableName").toString();if(tableName.equals("yonghu")) {shangpinxinxi.setZhanghao((String)request.getSession().getAttribute("username"));}EntityWrapper<ShangpinxinxiEntity> ew = new EntityWrapper<ShangpinxinxiEntity>();PageUtils page = shangpinxinxiService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, shangpinxinxi), params), params));return R.ok().put("data", page);}/*** 前端列表*/@IgnoreAuth@RequestMapping("/list")public R list(@RequestParam Map<String, Object> params,ShangpinxinxiEntity shangpinxinxi, HttpServletRequest request){EntityWrapper<ShangpinxinxiEntity> ew = new EntityWrapper<ShangpinxinxiEntity>();PageUtils page = shangpinxinxiService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, shangpinxinxi), params), params));return R.ok().put("data", page);}/*** 列表*/@RequestMapping("/lists")public R list( ShangpinxinxiEntity shangpinxinxi){EntityWrapper<ShangpinxinxiEntity> ew = new EntityWrapper<ShangpinxinxiEntity>();ew.allEq(MPUtil.allEQMapPre( shangpinxinxi, "shangpinxinxi")); return R.ok().put("data", shangpinxinxiService.selectListView(ew));}/*** 查询*/@RequestMapping("/query")public R query(ShangpinxinxiEntity shangpinxinxi){EntityWrapper< ShangpinxinxiEntity> ew = new EntityWrapper< ShangpinxinxiEntity>();ew.allEq(MPUtil.allEQMapPre( shangpinxinxi, "shangpinxinxi")); ShangpinxinxiView shangpinxinxiView =  shangpinxinxiService.selectView(ew);return R.ok("查询商品信息成功").put("data", shangpinxinxiView);}/*** 后端详情*/@RequestMapping("/info/{id}")public R info(@PathVariable("id") Long id){ShangpinxinxiEntity shangpinxinxi = shangpinxinxiService.selectById(id);shangpinxinxi = shangpinxinxiService.selectView(new EntityWrapper<ShangpinxinxiEntity>().eq("id", id));return R.ok().put("data", shangpinxinxi);}/*** 前端详情*/@IgnoreAuth@RequestMapping("/detail/{id}")public R detail(@PathVariable("id") Long id){ShangpinxinxiEntity shangpinxinxi = shangpinxinxiService.selectById(id);shangpinxinxi = shangpinxinxiService.selectView(new EntityWrapper<ShangpinxinxiEntity>().eq("id", id));return R.ok().put("data", shangpinxinxi);}/*** 后端保存*/@RequestMapping("/save")public R save(@RequestBody ShangpinxinxiEntity shangpinxinxi, HttpServletRequest request){shangpinxinxi.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(shangpinxinxi);shangpinxinxiService.insert(shangpinxinxi);return R.ok();}/*** 前端保存*/@RequestMapping("/add")public R add(@RequestBody ShangpinxinxiEntity shangpinxinxi, HttpServletRequest request){shangpinxinxi.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(shangpinxinxi);shangpinxinxiService.insert(shangpinxinxi);return R.ok();}/*** 修改*/@RequestMapping("/update")@Transactionalpublic R update(@RequestBody ShangpinxinxiEntity shangpinxinxi, HttpServletRequest request){//ValidatorUtils.validateEntity(shangpinxinxi);shangpinxinxiService.updateById(shangpinxinxi);//全部更新return R.ok();}/*** 删除*/@RequestMapping("/delete")public R delete(@RequestBody Long[] ids){shangpinxinxiService.deleteBatchIds(Arrays.asList(ids));return R.ok();}}

核心代码2：

package com.cl.controller;import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;import com.cl.utils.ValidatorUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.cl.annotation.IgnoreAuth;import com.cl.entity.OrdersEntity;
import com.cl.entity.view.OrdersView;import com.cl.service.OrdersService;
import com.cl.service.TokenService;
import com.cl.utils.PageUtils;
import com.cl.utils.R;
import com.cl.utils.MPUtil;
import com.cl.utils.CommonUtil;
import java.io.IOException;/*** 商品订单* 后端接口* @author * @email * @date 2024-03-19 00:30:59*/
@RestController
@RequestMapping("/orders")
public class OrdersController {@Autowiredprivate OrdersService ordersService;/*** 后端列表*/@RequestMapping("/page")public R page(@RequestParam Map<String, Object> params,OrdersEntity orders,HttpServletRequest request){if(!request.getSession().getAttribute("role").toString().equals("管理员")) {orders.setUserid((Long)request.getSession().getAttribute("userId"));}String tableName = request.getSession().getAttribute("tableName").toString();if(tableName.equals("yonghu")) {orders.setZhanghao((String)request.getSession().getAttribute("username"));if(orders.getUserid()!=null) {orders.setUserid(null);}}EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();PageUtils page = ordersService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, orders), params), params));return R.ok().put("data", page);}/*** 前端列表*/@IgnoreAuth@RequestMapping("/list")public R list(@RequestParam Map<String, Object> params,OrdersEntity orders, HttpServletRequest request){EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();PageUtils page = ordersService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, orders), params), params));return R.ok().put("data", page);}/*** 列表*/@RequestMapping("/lists")public R list( OrdersEntity orders){EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();ew.allEq(MPUtil.allEQMapPre( orders, "orders")); return R.ok().put("data", ordersService.selectListView(ew));}/*** 查询*/@RequestMapping("/query")public R query(OrdersEntity orders){EntityWrapper< OrdersEntity> ew = new EntityWrapper< OrdersEntity>();ew.allEq(MPUtil.allEQMapPre( orders, "orders")); OrdersView ordersView =  ordersService.selectView(ew);return R.ok("查询商品订单成功").put("data", ordersView);}/*** 后端详情*/@RequestMapping("/info/{id}")public R info(@PathVariable("id") Long id){OrdersEntity orders = ordersService.selectById(id);orders = ordersService.selectView(new EntityWrapper<OrdersEntity>().eq("id", id));return R.ok().put("data", orders);}/*** 前端详情*/@IgnoreAuth@RequestMapping("/detail/{id}")public R detail(@PathVariable("id") Long id){OrdersEntity orders = ordersService.selectById(id);orders = ordersService.selectView(new EntityWrapper<OrdersEntity>().eq("id", id));return R.ok().put("data", orders);}/*** 后端保存*/@RequestMapping("/save")public R save(@RequestBody OrdersEntity orders, HttpServletRequest request){orders.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(orders);orders.setUserid((Long)request.getSession().getAttribute("userId"));ordersService.insert(orders);return R.ok();}/*** 前端保存*/@RequestMapping("/add")public R add(@RequestBody OrdersEntity orders, HttpServletRequest request){orders.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());//ValidatorUtils.validateEntity(orders);ordersService.insert(orders);return R.ok();}/*** 修改*/@RequestMapping("/update")@Transactionalpublic R update(@RequestBody OrdersEntity orders, HttpServletRequest request){//ValidatorUtils.validateEntity(orders);ordersService.updateById(orders);//全部更新return R.ok();}/*** 删除*/@RequestMapping("/delete")public R delete(@RequestBody Long[] ids){ordersService.deleteBatchIds(Arrays.asList(ids));return R.ok();}}