1.工作台

1.1实现思路

工作台是系统运营的数据看板，并提供快捷操作入口，可以有效提高商家的工作效率。

工作台展示的数据：

①今日数据

②订单管理

③菜品总览

④套餐总览

⑤订单信息

名词解释：

①营业额：已经完成订单的总金额

②有效订单：已经完成订单的数量

③订单完成率：有效订单数/总订单数*100%

④平均客单价：营业额/有效订单数

⑤新增用户：新增用户的数量

接口设计：

①今日数据的接口设计：

②订单管理的接口设计：

③菜品总览的接口设计：

④套餐总览的接口设计：

1.2实现代码

WorkSpaceController.java代码：

package com.sky.controller.admin;import com.sky.result.Result;
import com.sky.service.WorkspaceService;
import com.sky.vo.BusinessDataVO;
import com.sky.vo.DishOverViewVO;
import com.sky.vo.OrderOverViewVO;
import com.sky.vo.SetmealOverViewVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.time.LocalDateTime;
import java.time.LocalTime;/*** 工作台*/
@RestController
@RequestMapping("/admin/workspace")
@Slf4j
@Api(tags = "工作台相关接口")
public class WorkSpaceController {@Autowiredprivate WorkspaceService workspaceService;/*** 工作台今日数据查询* @return*/@GetMapping("/businessData")@ApiOperation("工作台今日数据查询")public Result<BusinessDataVO> businessData(){//获得当天的开始时间LocalDateTime begin = LocalDateTime.now().with(LocalTime.MIN);//获得当天的结束时间LocalDateTime end = LocalDateTime.now().with(LocalTime.MAX);BusinessDataVO businessDataVO = workspaceService.getBusinessData(begin, end);return Result.success(businessDataVO);}/*** 查询订单管理数据* @return*/@GetMapping("/overviewOrders")@ApiOperation("查询订单管理数据")public Result<OrderOverViewVO> orderOverView(){return Result.success(workspaceService.getOrderOverView());}/*** 查询菜品总览* @return*/@GetMapping("/overviewDishes")@ApiOperation("查询菜品总览")public Result<DishOverViewVO> dishOverView(){return Result.success(workspaceService.getDishOverView());}/*** 查询套餐总览* @return*/@GetMapping("/overviewSetmeals")@ApiOperation("查询套餐总览")public Result<SetmealOverViewVO> setmealOverView(){return Result.success(workspaceService.getSetmealOverView());}
}

WorkspaceService.java代码：

package com.sky.service;import com.sky.vo.BusinessDataVO;
import com.sky.vo.DishOverViewVO;
import com.sky.vo.OrderOverViewVO;
import com.sky.vo.SetmealOverViewVO;
import java.time.LocalDateTime;public interface WorkspaceService {/*** 根据时间段统计营业数据* @param begin* @param end* @return*/BusinessDataVO getBusinessData(LocalDateTime begin, LocalDateTime end);/*** 查询订单管理数据* @return*/OrderOverViewVO getOrderOverView();/*** 查询菜品总览* @return*/DishOverViewVO getDishOverView();/*** 查询套餐总览* @return*/SetmealOverViewVO getSetmealOverView();}

WorkspaceServiceImpl.java代码：

package com.sky.service.impl;import com.sky.constant.StatusConstant;
import com.sky.entity.Orders;
import com.sky.mapper.DishMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.WorkspaceService;
import com.sky.vo.BusinessDataVO;
import com.sky.vo.DishOverViewVO;
import com.sky.vo.OrderOverViewVO;
import com.sky.vo.SetmealOverViewVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.HashMap;
import java.util.Map;@Service
@Slf4j
public class WorkspaceServiceImpl implements WorkspaceService {@Autowiredprivate OrderMapper orderMapper;@Autowiredprivate UserMapper userMapper;@Autowiredprivate DishMapper dishMapper;@Autowiredprivate SetmealMapper setmealMapper;/*** 根据时间段统计营业数据* @param begin* @param end* @return*/public BusinessDataVO getBusinessData(LocalDateTime begin, LocalDateTime end) {/*** 营业额：当日已完成订单的总金额* 有效订单：当日已完成订单的数量* 订单完成率：有效订单数 / 总订单数* 平均客单价：营业额 / 有效订单数* 新增用户：当日新增用户的数量*/Map map = new HashMap();map.put("begin",begin);map.put("end",end);//查询总订单数Integer totalOrderCount = orderMapper.countByMap(map);map.put("status", Orders.COMPLETED);//营业额Double turnover = orderMapper.sumByMap(map);turnover = turnover == null? 0.0 : turnover;//有效订单数Integer validOrderCount = orderMapper.countByMap(map);Double unitPrice = 0.0;Double orderCompletionRate = 0.0;if(totalOrderCount != 0 && validOrderCount != 0){//订单完成率orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;//平均客单价unitPrice = turnover / validOrderCount;}//新增用户数Integer newUsers = userMapper.countByMap(map);return BusinessDataVO.builder().turnover(turnover).validOrderCount(validOrderCount).orderCompletionRate(orderCompletionRate).unitPrice(unitPrice).newUsers(newUsers).build();}/*** 查询订单管理数据** @return*/public OrderOverViewVO getOrderOverView() {Map map = new HashMap();map.put("begin", LocalDateTime.now().with(LocalTime.MIN));map.put("status", Orders.TO_BE_CONFIRMED);//待接单Integer waitingOrders = orderMapper.countByMap(map);//待派送map.put("status", Orders.CONFIRMED);Integer deliveredOrders = orderMapper.countByMap(map);//已完成map.put("status", Orders.COMPLETED);Integer completedOrders = orderMapper.countByMap(map);//已取消map.put("status", Orders.CANCELLED);Integer cancelledOrders = orderMapper.countByMap(map);//全部订单map.put("status", null);Integer allOrders = orderMapper.countByMap(map);return OrderOverViewVO.builder().waitingOrders(waitingOrders).deliveredOrders(deliveredOrders).completedOrders(completedOrders).cancelledOrders(cancelledOrders).allOrders(allOrders).build();}/*** 查询菜品总览** @return*/public DishOverViewVO getDishOverView() {Map map = new HashMap();map.put("status", StatusConstant.ENABLE);Integer sold = dishMapper.countByMap(map);map.put("status", StatusConstant.DISABLE);Integer discontinued = dishMapper.countByMap(map);return DishOverViewVO.builder().sold(sold).discontinued(discontinued).build();}/*** 查询套餐总览** @return*/public SetmealOverViewVO getSetmealOverView() {Map map = new HashMap();map.put("status", StatusConstant.ENABLE);Integer sold = setmealMapper.countByMap(map);map.put("status", StatusConstant.DISABLE);Integer discontinued = setmealMapper.countByMap(map);return SetmealOverViewVO.builder().sold(sold).discontinued(discontinued).build();}
}

SetmealMapper.java代码：

/*** 根据条件统计套餐数量* @param map* @return*/Integer countByMap(Map map);

 SetmealMapper.XML代码：

<select id="countByMap" resultType="java.lang.Integer">select count(id) from setmeal<where><if test="status != null">and status = #{status}</if><if test="categoryId != null">and category_id = #{categoryId}</if></where></select>

DishMapper.java代码：

/*** 根据条件统计菜品数量* @param map* @return*/Integer countByMap(Map map);

 DishMapperXML代码：

<select id="countByMap" resultType="java.lang.Integer">select count(id) from dish<where><if test="status != null">and status = #{status}</if><if test="categoryId != null">and category_id = #{categoryId}</if></where></select>

2.Apache POI

2.1介绍

Apache POI是一个处理Miscrosoft Office各种文件格式的开源项目。简单来说就是，我们可以使用POI在java程序中对Miscrosoft office各种文件进行读写操作。

一般情况下，POI都是用于操作Excel文件。

Apache POI的应用场景：

①银行网银行系统导出交易明细

②各种业务系统导出Excel报表

③批量导入业务数据

2.2入门案例

代码：

package com.sky.test;import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;/*** 使用POI操作Excel文件*/
public class POITest {/*** 通过POI创建Excel文件并且写入文件内容*/public static void write() throws Exception{//在内存中创建一个excel表格XSSFWorkbook excel = new XSSFWorkbook();//在excel文件中创建一个Sheet页XSSFSheet sheet = excel.createSheet("info");//在Sheet中创建行对象，rownum编号从0开始XSSFRow row = sheet.createRow(1);//创建单元格并且写入文件内容row.createCell(1).setCellValue("姓名");row.createCell(2).setCellValue("城市");//创建一个新行XSSFRow row1 = sheet.createRow(2);row1.createCell(1).setCellValue("张三");row1.createCell(2).setCellValue("北京");//创建一个新行XSSFRow row2 = sheet.createRow(3);row2.createCell(1).setCellValue("李四");row2.createCell(2).setCellValue("南京");//通过输出流将内存中的Excel文件写入到磁盘FileOutputStream out = new FileOutputStream(new File("E:\\info.xlsx"));excel.write(out);//关闭资源out.close();excel.close();}/*** 通过POI读取Excel文件中的内容*/public static void read() throws Exception {FileInputStream in = new FileInputStream(new File("E:\\info.xlsx"));//读取磁盘上已经存在的Excel文件XSSFWorkbook excel = new XSSFWorkbook(in);//读取Excel文件中的第一个Sheet页XSSFSheet sheet = excel.getSheetAt(0);//获取Sheet中最后一行的行号int lastRowNum = sheet.getLastRowNum();for (int i = 1;i<=lastRowNum;i++){//获取某一行XSSFRow row = sheet.getRow(i);//获取单元格对象String cellValue1 = row.getCell(1).getStringCellValue();String cellValue2 = row.getCell(2).getStringCellValue();System.out.println(cellValue1+" "+cellValue2);}//关闭资源in.close();excel.close();}public static void main(String[] args) throws Exception {//write();read();}
}

3.导出运营数据Excel报表

3.1实现思路

产品原型：

导出的Excel报表格式：

业务规则：

①导出Excel形式的报表文件

②导出最近30天的运营数据

接口设计：

注意：当前接口没有返回数据，因为报表导出功能本质上是文件下载，服务端会通过输出流将Excel文件下载到客户端浏览器

实现步骤：

①设计Excel模板文件

②查询近30天的运营数据

③将查询到的运营数据写入模板文件

④通过输出流将Excel文件下载到客户端浏览器

3.2实现代码

ReportController.java代码：

/*** 导出运营数据报表* @param response*/@GetMapping("/export")@ApiOperation("导出运营数据报表")public void export(HttpServletResponse response){reportService.exportBusinessData(response);}

ReportService.java代码：

/*** 导出运营数据报表* @param response*/void exportBusinessData(HttpServletResponse response);

ReportServiceImpl.java代码：

@Autowiredprivate WorkspaceService workspaceService;
/*** 导出运营数据报表* @param response*/@Overridepublic void exportBusinessData(HttpServletResponse response) {//1.查询数据库，获取营业数据--查询最近30天的运营数据LocalDate dateBegin = LocalDate.now().minusDays(30);LocalDate dateEnd = LocalDate.now().minusDays(1);//查询概况数据BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));//2.通过POI将数据写入到Excel文件中InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");try {//基于模板文件创建一个新的Excel文件XSSFWorkbook excel = new XSSFWorkbook(in);//获取表格文件的Sheet页XSSFSheet sheet = excel.getSheet("Sheet1");//填充数据--时间sheet.getRow(1).getCell(1).setCellValue("时间："+dateBegin+"至"+dateEnd);//获取第4行XSSFRow row = sheet.getRow(3);row.getCell(2).setCellValue(businessDataVO.getTurnover());row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());row.getCell(6).setCellValue(businessDataVO.getNewUsers());//获取第5行row = sheet.getRow(4);row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());row.getCell(4).setCellValue(businessDataVO.getUnitPrice());//填充明细数据for (int i = 0;i<30;i++){LocalDate date = dateBegin.plusDays(i);//查询某一天的营业数据BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));//获得某一行row = sheet.getRow(7+i);row.getCell(1).setCellValue(date.toString());row.getCell(2).setCellValue(businessData.getTurnover());row.getCell(3).setCellValue(businessData.getValidOrderCount());row.getCell(4).setCellValue(businessData.getOrderCompletionRate());row.getCell(5).setCellValue(businessData.getUnitPrice());row.getCell(6).setCellValue(businessData.getNewUsers());}//3.通过输出流的Excel文件下载到客户端浏览器ServletOutputStream out = response.getOutputStream();excel.write(out);//关闭资源out.close();excel.close();} catch (IOException e) {throw new RuntimeException(e);}}