统计图表展示

一后端聚合数据

1 web层

@ApiOperation("显示统计数据")
@GetMapping("show-chart/{begin}/{end}")
public R showChart(
        @ApiParam("开始时间") @PathVariable String begin,
        @ApiParam("结束时间") @PathVariable String end){
    Map<String, Map<String, Object>> map = dailyService.getChartData(begin, end);
    return R.ok().data("chartData", map);
}

2 service层

接口

Map<String, Map<String, Object>> getChartData(String begin, String end);

实现

@Override
public Map<String, Map<String, Object>> getChartData(String begin, String end) {
    // 学员登录数统计
    Map<String, Object> registerNum = this.getChartDataByType(begin, end, "register_num");
    // 学员注册数统计
    Map<String, Object> loginNum = this.getChartDataByType(begin, end, "login_num");
    // 课程播放数统计
    Map<String, Object> videoViewNum = this.getChartDataByType(begin, end, "video_view_num");
    // 每日新增课程数统计
    Map<String, Object> courseNum = this.getChartDataByType(begin, end, "course_num");
    Map<String, Map<String, Object>> map = new HashMap<>();
    map.put("registerNum", registerNum);
    map.put("loginNum", loginNum);
    map.put("videoViewNum", videoViewNum);
    map.put("courseNum", courseNum);
    return map;
}
/**
* 根据时间和要查询的列查询数据
* @param begin
* @param end
* @param type 要查询的列名
* @return
*/
private Map<String, Object> getChartDataByType(String begin, String end, String type){
    Map<String, Object> map = new HashMap<>();
    List<String> xList = new ArrayList<>(); // 日期列表
    List<Integer> yList = new ArrayList<>(); // 数据列表
    QueryWrapper<Daily> queryWrapper = new QueryWrapper<>();
    queryWrapper.select("date_calculated", type);
    queryWrapper.between("date_calculated", begin, end);
    List<Map<String, Object>> mapsData = baseMapper.selectMaps(queryWrapper);
    for (Map<String, Object> data : mapsData) {
        String dateCalculated = (String)data.get("date_calculated");
        xList.add(dateCalculated);
        Integer count = (Integer)data.get(type);
        yList.add(count);
    }
    map.put("xData", xList);
    map.put("yData", yList);
    return map;
}

二前端显示图标

1 api

showChart(searchObj) {
    return request({
      // baseURL: 'http://127.0.0.1:8180',
      url: `/admin/statistics/daily/show-chart/${searchObj.begin}/${searchObj.end}`,
      method: 'get'
    })
  }

2 脚本

<script>
var echarts = require('echarts')
import statisticsApi from '@/api/statistics'
export default {
  data() {
    return {
      searchObj: {},
      btnDisabled: false,
      chartData: {} // 数据
    }
  },
  methods: {
    // 显示数据
    showChart() {
      statisticsApi.showChart(this.searchObj).then(response => {
        this.chartData = response.data.chartData
        this.showChartByType('register_num', '学员登录数统计', this.chartData.courseNum)
        this.showChartByType('login_num', '学员注册数统计', this.chartData.registerNum)
        this.showChartByType('video_view_num', '课程播放数统计', this.chartData.videoViewNum)
        this.showChartByType('course_num', '每日课程数统计', this.chartData.loginNum)
      })
    },
    showChartByType(type, title, data) {
      // 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById(type))
      // 指定图表的配置项和数据
      var option = {
        title: {
          text: title
        },
        xAxis: {
          data: data.xData
        },
        yAxis: {},
        series: [{
          type: 'line',
          data: data.yData
        }]
      }
      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option)
    }
  }
}
</script>