介绍
Apache ECharts 是一款基于 Javascript 的数据可视化图表库,提供直观,生动,可交互,可个性化定制的数据可视化图表。
官网地址:https://echarts.apache.org/zh/index.html
入门案例
Apache Echarts官方提供的快速入门:https://echarts.apache.org/handbook/zh/get-started/
入门案例的html代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>ECharts</title>
<!-- 引入刚刚下载的 ECharts 文件 -->
<script src="echarts.js"></script>
</head>
<body>
<!-- 为 ECharts 准备一个定义了宽高的 DOM -->
<div id="main" style="width: 600px;height:400px;"></div>
<script type="text/javascript">
// 基于准备好的dom,初始化echarts实例
var myChart = echarts.init(document.getElementById('main'));
// 指定图表的配置项和数据
var option = {
title: {
text: 'ECharts 入门示例'
},
tooltip: {},
legend: {
data: ['销量']
},
xAxis: {
data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
},
yAxis: {},
series: [
{
name: '销量',
type: 'bar',
data: [5, 20, 36, 10, 10, 20]
}
]
};
// 使用刚指定的配置项和数据显示图表。
myChart.setOption(option);
</script>
</body>
</html>
结果如图:
总结:使用Echarts,重点在于研究当前图表所需的数据格式。通常是需要后端提供符合格式要求的动态数据,然后响应给前端来展示图表。
应用
使用Apache Echarts 可视化商店的营业额,业务规则:
- 营业额指订单状态为已完成的订单金额合计
- 基于可视化报表的折线图展示营业额数据,X轴为日期,Y轴为营业额
- 根据时间选择区间,展示每天的营业额数据
接口设计:
根据接口定义设计对应的VO:
Controller相关代码:
package com.sky.controller.admin;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.vo.TurnoverReportVO;
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.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.time.LocalDate;
import java.time.LocalDateTime;
/**
* ClassName: ReportController
* PackageName: com.sky.controller.admin
* Description: 数据统计相关接口
*
* @Author Xiyan Zhong
* @Create 2024/3/1 上午11:19
* @Version 1.0
*/
@RestController
@RequestMapping("/admin/report")
@Api(tags = "数据统计相关接口")
@Slf4j
public class ReportController {
@Autowired
private ReportService reportService;
/**
* 营业额统计
* @param begin
* @param end
* @return
*/
@GetMapping("/turnoverStatistics")
@ApiOperation("营业额统计")
public Result<TurnoverReportVO> turnoverStatistics(
@DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate begin,
@DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end){
log.info("营业额统计:{},{}",begin,end);
return Result.success(reportService.getTurnoverStatistics(begin,end));
}
}
Service接口:
package com.sky.service;
import com.sky.vo.TurnoverReportVO;
import java.time.LocalDate;
/**
* ClassName: ReportService
* PackageName: com.sky.service
* Description:
*
* @Author Xiyan Zhong
* @Create 2024/3/1 上午11:27
* @Version 1.0
*/
public interface ReportService {
/**
* 统计指定区间内的营业额数据
* @param begin
* @param end
* @return
*/
TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end);
}
Service实现类:
package com.sky.service.impl;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.service.ReportService;
import com.sky.vo.TurnoverReportVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* ClassName: ReportServiceImpl
* PackageName: com.sky.service.impl
* Description:
*
* @Author Xiyan Zhong
* @Create 2024/3/1 上午11:30
* @Version 1.0
*/
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
@Autowired
private OrderMapper orderMapper;
/**
* 统计指定区间内的营业额数据
* @param begin
* @param end
* @return
*/
@Override
public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
// 当前集合用于存放从begin到end范围内的每天日期
List<LocalDate> dateList = new ArrayList<>();
dateList.add(begin);
while (!begin.equals(end)){
// 日期计算,计算指定日期的后一天对应的日期
begin = begin.plusDays(1);
dateList.add(begin);
}
// 存放每天的营业额
List<Double> turnoverList = new ArrayList<>();
for (LocalDate date : dateList) {
// 查询date日期对应的营业额数据,营业额是指:状态为“已完成”的订单金额合计
LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
// select sum(amount) from orders where order_time > beginTime and order_time < endTime and status = 5
Map map = new HashMap();
map.put("begin",beginTime);
map.put("end",endTime);
map.put("status", Orders.COMPLETED);
Double turnover = orderMapper.sumByMap(map);
turnover = turnover == null ? 0.0 :turnover;
turnoverList.add(turnover);
}
// 封装结果并返回
return TurnoverReportVO
.builder()
.dateList(StringUtils.join(dateList,","))
.turnoverList(StringUtils.join(turnoverList,","))
.build();
}
}
Mapper相关代码:
package com.sky.mapper;
import java.util.Map;
/**
* ClassName: OrderMapper
* PackageName: com.sky.mapper
* Description:
*
* @Author Xiyan Zhong
* @Create 2024/1/5 上午9:48
* @Version 1.0
*/
@Mapper
public interface OrderMapper {
/**
* 根据动态条件统计营业额数据
* @param map
* @return
*/
Double sumByMap(Map map);
}
通过xml实现数据库的查询:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.sky.mapper.OrderMapper">
<select id="sumByMap" resultType="java.lang.Double">
select sum(amount) from orders
<where>
<if test="begin != null"> and order_time >= #{begin}</if>
<if test="end != null"> and order_time <= #{end}</if>
<if test="status != null"> and status = #{status}</if>
</where>
</select>
</mapper>
实现效果: