总结一下自己最近项目中用动态获取接口数据并画图的方法。

1、对原型的理解与需求分析

话不多说,先看下原型:

这里的需求是:选取el-date-中的自定义时间、点击本周、本月、本年时,将数据显示在饼图中

这里的需求是:选取el-date-中的自定义时间、点击本周、本月、本年时,将数据显示在饼图中

这里的需求是:选取el-date-中的自定义时间、点击本周、本月时,折线图的X轴(时间轴)返回的日期格式是每天的统计量

这里的需求是:点击本年时,折线图的X轴(时间轴)返回的日期格式是每月的统计量

需求分析明确后,开始画图吧!

2、图表绘制

代码如下:

<template>
  <div class="ai-wrapper">
    <h3 class="flex-a-start"><div class="vertical"></div><div>AI预警系统</div></h3>
    <div class="block-left">
      <div class="block-title">各类型告警占比统计</div>
      <div class="block-picker">
        <el-date-picker
          v-model="form.typeDate"
          class="block-date-picker"
          :editable="false"
          type="daterange"
          :picker-options="pickerOptions"
          range-separator="~"
          start-placeholder="开始时间"
          end-placeholder="结束时间"
          format="yyyy/MM/dd"
          @change='getWarningType("type")'
        />
        <el-button-group class="block-button-picker">
          <el-button
            @click='getWarningType("type", "week")'
          >
            本周
          </el-button>
          <el-button
            @click='getWarningType("type", "month")'
          >
            本月
          </el-button>
          <el-button
            @click='getWarningType("type", "year")'
          >
            本年
          </el-button>
        </el-button-group>
      </div>
      <div id="block-left-chart" />
    </div>
    <div class="block-right">
      <div class="block-title">各监控点告警数量占比统计</div>
      <div class="block-picker">
        <el-date-picker
          v-model="form.addressDate"
          class="block-date-picker"
          :editable="false"
          type="daterange"
          :picker-options="pickerOptions"
          range-separator="~"
          format="yyyy/MM/dd"
          start-placeholder="开始时间"
          end-placeholder="结束时间"
          @change='getwarningAddress("address")'
        />
        <el-button-group class="block-button-picker">
          <el-button
            @click='getwarningAddress("address", "week")'
          >
            本周
          </el-button>
          <el-button
            @click='getwarningAddress("address", "month")'
          >
            本月
          </el-button>
          <el-button
            @click='getwarningAddress("address", "year")'
          >
            本年
          </el-button>
        </el-button-group>
      </div>
      <div id="block-right-chart" />
    </div>
    <div class="block-bottom">
      <div class="block-title">各类型告警发生量统计</div>
      <div class="block-bottom-picker">
        <el-date-picker
          v-model="form.trendDate"
          class="block-date-picker"
          :editable="false"
          type="daterange"
          :picker-options="pickerOptions"
          range-separator="~"
          start-placeholder="开始时间"
          end-placeholder="结束时间"
          format="yyyy/MM/dd"
          @change='getwarningTrend("trend")'
        />
        <el-button-group class="block-button-picker">
          <el-button
            @click='getwarningTrend("trend", "week")'
          >
            本周
          </el-button>
          <el-button
            @click='getwarningTrend("trend", "month")'
          >
            本月
          </el-button>
          <el-button
            @click='getwarningTrend("trend", "year")'
          >
            本年
          </el-button>
        </el-button-group>
      </div>
      <div id="block-bottom-chart" />
    </div>
  </div>
</template>

绘制完图表后,我们来处理下数据:

3、数据和方法的处理

在数据处理之前,接口的引入和接口定义的方法这里就不展示了,先来看下data中数据初始化吧:

  data() {
    return {
      pickerOptions: {
        disabledDate(time) {
          return time.getTime() > Date.now();
        }
      },
      form: {
        typeDate: '',
        addressDate: '',
        trendDate: '',
        // startTime 和 endTime是调用接口时往后台传递的参数
        startTime: '',
        endTime: ''
      },
      color: '#000',
      color1: ['#3AA1FF', '#64BAFF', '#48a5ff', '#3b88e1', '#336fc2', '#325ea1'],
      color2: ['#3fa1ff', '#78e7fc', '#23d8bc', '#7af0c8', '#77ca45', '#addf83', '#ffd05a', '#e88657', '#e55757', '#f7a798', '#a566fb'],
      // 以下是用来存储接口返回的数据
      warnPlaceDate: [],
      warnTypeDate: [],
      legendData: [],
      xAxisData: [],
      itemData: []
    };
  },

组件加载完后,需要调用接口,每个图默认显示的是本周的数据,如下:

这里调用接口的两个参数分别是事件类别和时间类别,后边会说到

  mounted() {
    this.getWarningType('type', 'week');
    this.getwarningAddress('address', 'week');
    this.getwarningTrend('trend', 'week');
  },

接下来看看中都有哪些方法吧,因为要分开说,所以直接上方法吧:

首先是画图的方法:

wps表格图怎么两条折线_内盘怎样让系统统计为外盘_怎样让chatgpt生成折线统计图

    drawLeftChart() {
      const myChart = this.$echarts.init(document.getElementById('block-left-chart'));
      myChart.setOption({
        tooltip: {
          trigger: 'item',
          formatter: '{a} 
{b} ({d}%)'
, }, label: { color: this.color }, labelLine: { lineStyle: { color: this.color }, smooth: 0.2, length: 10, length2: 20 }, series: [{ name: '预警类型', type: 'pie', roseType: 'radius', radius: '75%', data: this.warnTypeDate }] }); }, drawRightChart() { const myChart = this.$echarts.init(document.getElementById('block-right-chart')); myChart.setOption({ tooltip: { trigger: 'item' }, label: { color: this.color, formatter: '{b} {d}%' }, labelLine: { lineStyle: { color: this.color }, smooth: 0.2, length: 10, length2: 20 }, legend: { bottom: 0, data: this.warnPlaceDate }, series: [{ name: '预警类型', type: 'pie', radius: ['35%', '55%'], center: ['50%', '40%'], data: this.warnPlaceDate }] }); }, drawBottomChart() { const myChart = this.$echarts.init(document.getElementById('block-bottom-chart')); myChart.clear(); const options = { tooltip: { trigger: 'axis', axisPointer: { type: 'shadow' } }, legend: { icon: 'rect', itemWidth: 10, itemHeight: 10, itemGap: 20, data: this.legendData, left: 30 }, grid: { left: '3%', right: '3%', bottom: '3%', containLabel: true }, xAxis: [{ type: 'category', axisLine: { show: false }, axisTick: { show: false }, axisLabel: { color: '#9AA1A9' }, boundaryGap: false, data: this.xAxisData }], yAxis: [{ type: 'value', axisLine: { show: false }, axisTick: { show: false }, axisLabel: { color: '#9AA1A9' } }], series: this.itemData }; myChart.setOption(options); myChart.resize(); },

接下来比较艰巨的一个任务就是对时间格式的处理,el-date- 的默认时间格式是 yyyy-MM-dd,而我们页面上需要显示的格式是yyyy/MM/dd,需要传递给后端的时间格式为,而后端返回来的时间格式为:,这里格式简单的说下,大家可以根据自己的需求来定

时间格式以及格式化的处理

    // 封装时间查询的方法
    // 参数 formType 和 dateType分别代表事件类别和时间类别
    selectDate(formType, dateType) {
      const formDate = { ...this.form };
      let startDate;
      let startDateView; // 展示在页面的数据
      let endDate = moment(new Date()).format('YYYYMMDD');
      const endDateView = moment(new Date()).format('YYYY/MM/DD'); // 展示在页面的数据
      // 按时间查询
      if (dateType === 'week') {
        const d = new Date();
        const day = d.getDay();
        const date = d.getDate();
        if (day === 0) {
          d.setDate(date - 6);
        } else {
          d.setDate(date - day + 1);
        }
        startDate = moment(d).format('YYYYMMDD');
        startDateView = moment(d).format('YYYY/MM/DD');
      } else if (dateType === 'month') {
        const startMoment = moment().startOf('month');
        startDate = startMoment.format('YYYYMMDD');
        startDateView = startMoment.format('YYYY/MM/DD');
      } else if (dateType === 'year') {
        const startMoment = moment().startOf('year');
        startDate = startMoment.format('YYYYMMDD');
        startDateView = startMoment.format('YYYY/MM/DD');
      }
      // 按类别(类型、地点、趋势)来查,设值
      if (formType === 'type') {
        if (!dateType) {
          startDate = moment(this.form.typeDate[0]).format('YYYYMMDD');
          endDate = moment((this.form.typeDate[1])).format('YYYYMMDD');
        } else {
          this.form.typeDate = [startDateView, endDateView];
        }
      } else if (formType === 'address') {
        if (!dateType) {
          startDate = moment(this.form.addressDate[0]).format('YYYYMMDD');
          endDate = moment(this.form.addressDate[1]).format('YYYYMMDD');
        } else {
          this.form.addressDate = [startDateView, endDateView];
        }
      } else if (formType === 'trend') {
        if (!dateType) {
          startDate = moment(this.form.trendDate[0]).format('YYYYMMDD');
          endDate = moment(this.form.trendDate[1]).format('YYYYMMDD');
        } else {
          this.form.trendDate = [startDateView, endDateView];
        }
      }
      formDate.startTime = startDate;
      formDate.endTime = endDate;
      return formDate;
    },

这个方法看着很庞大,不要害怕哈,上半部分主要是获取参数,包含参数 和 , 分为四种情况,type(week month year) 和 !type, type(week month year) 对应btn的数据, !type 对应 el-date- 的数据

下半部分主要是通过参数 来获取 各自的 的情况

这两个参数的含义上边有提到,这里不说了

接下来处理时间的一些细节问题,也就是在折线图中的 x轴时间轴,时间的返回格式。

上边有说到过,如果是按照 !type和本周、本月查询,返回每日的数据,如果按照本年来查,返回的是每月的数据,这里数据的统计是后端处理好的,我们只需要拿到数据并渲染出来

时间轴时间的格式处理

有个细节需要注意下,如果某天或者某月没有数据时,后端是不会返回数据的,但是在前端页面上需要展示数据为0,所以如果我们像往常一样正常遍历的话,数据会出现错乱的问题

所以这块需要前端处理,后边会说到处理方法,先看下时间的获取吧

    // 获取日期范围内所有天数
    getYearAndMonthAndDay(start, end) {
      const dateAll = [];
      let i = 0;
      const startTime = this.getDate(start);
      const endTime = this.getDate(end);
      while ((endTime.getTime() - startTime.getTime()) >= 0) {
        const year = startTime.getFullYear();
        const month = (startTime.getMonth() + 1).toString().length === 1 ? "0" + (startTime.getMonth()).toString() : (startTime.getMonth()).toString();
        var day = startTime.getDate().toString().length === 1 ? "0"+startTime.getDate() : startTime.getDate();
        dateAll[i] = year + "-" + month + "-" + day;
        startTime.setDate(startTime.getDate() + 1);
        i += 1;
      }
      return dateAll;
    },
    getDate(datestr) {
      return new Date(datestr.substring(0, 4), datestr.substring(5, 7), datestr.substring(8, 10));
    },
    // 获取日期范围内所有月
    getYearAndMonth(start, end) {
      let result = [];
      const starts = start.split('/');
      const ends = end.split('/');
      let staYear = parseInt(starts[0]);
      let staMon = parseInt(starts[1]);
      const endYear = parseInt(ends[0]);
      const endMon = parseInt(ends[1]);
      result.push(staYear + "-" + starts[1]);
      // result.push(endYear+"-"+ends[1]);
      while (staYear <= endYear) {
        if (staYear === endYear) {
          let staMonStr = '';
          while (staMon < endMon) {
            staMon++;
            if (staMon < 10) {
              staMonStr = "0"+staMon;
            }
            result.push(staYear + "-" + staMonStr);
          }
            staYear++;
          } else {
            staMon++;
            var staMonStr = "";
            if (staMon > 12) {
              staMon = 1;
              staYear++;
            }
            if (staMon < 10 ) {
              staMonStr = "0"+staMon;
            }
            result.push(staYear+"-"+staMonStr);
          }
        }
      return result;
    },

时间格式处理完了,我们的参数都获取到了,接下来该调用接口了

接口调用的方法

饼图的方法比较简单,一起上吧:

    async getWarningType(formType, type) {
      const formDate = this.selectDate(formType, type);
      const data = { ...formDate };
      const resp = await warningType(data).then();
      if (resp.code === '1000') {
        if (resp.result) {
          this.warnTypeDate = [];
          const res = resp.result;
          for (let i = 0; i < res.length; i++) {
            const resData = res[i];
            if (resData.eventName && resData.num) {
              this.warnTypeDate[i] = {
                name: resData.eventName + `n` + resData.num,
                value: resData.num,
                itemStyle: { color: this.color1[i] }
              }
              JSON.stringify(this.warnTypeDate);
              this.warnTypeDate.sort(this.compareValue("value"));
            }
          }
          this.drawLeftChart();
        }
      }
    },
    async getwarningAddress(formType, type) {
      const formDate = this.selectDate(formType, type);
      const data = { ...formDate };
      const resp = await warningAddress(data).then();
      if (resp.code === '1000') {
        if (resp.result) {
          this.warnPlaceDate = [];
          const res = resp.result;
          for (let i = 0; i < res.length; i += 1) {
            const resData = res[i];
            if (resData.monitorPoint && resData.num) {
              this.warnPlaceDate[i] = {
                name: resData.monitorPoint,
                value: resData.num,
                itemStyle: { color: this.color2[i] }
              };
            }
          }
          this.drawRightChart();
        }
      }
    },

大家有注意到第一个饼图的方法里有个没定义的方法吗,的方法是对数据进行排序,因为第一个饼图是马丁格尔图,排下序更美观一点,方法如下:

    compareValue(protoTypeName) {
      return function(object1,object2){
        var val1 = object1[protoTypeName];
        var val2 = object2[protoTypeName];
        if(val1<val2){
          return 1;
        }else if(val1>val2){
          return -1;
        }else{
          return 0;
        }
      }
    },

接下来最重要的折线图的方法来了,因为这个折线图数据结构比较特殊,所以先上接口数据吧(以本年为例)

代码如下,可以对着数据看代码,比较好理解数据的处理

    async getwarningTrend(formType, type) {
      const formDate = this.selectDate(formType, type);
      const data = { ...formDate };
      const res = await warningTrend(data).then();
      this.legendData = [];
      this.xAxisData = [];
      this.itemData = [];
      let resultObj;
      if (res.code === '1000') {
        if (res.result) {
          const resultObj = res.result;
          if (type === 'year') {
            this.xAxisData = this.getYearAndMonth(this.form.trendDate[0], this.form.trendDate[1]);
          } else if (type === 'month' || type === 'week') {
            this.xAxisData = this.getYearAndMonthAndDay(this.form.trendDate[0], this.form.trendDate[1]);
          } else if (!type) {
            this.xAxisData = this.getYearAndMonthAndDay(moment(this.form.trendDate[0]).format('YYYY/MM/DD'), moment(this.form.trendDate[1]).format('YYYY/MM/DD'));
          }
          for (let typeKey in resultObj) {
            this.legendData.push(typeKey);
            const values = resultObj[typeKey];
            let dataList = [];
            for (var dateKey in values) {
              dataList.push(dateKey);
            }
            const num = [];
            for (let i = 0; i < this.xAxisData.length; i++) {
              let xAxis = this.xAxisData[i].replace(/-/g,'');
              if ( dataList.includes(xAxis)) {
                num.push(parseInt(values[xAxis]));
              } else {
                num.push(0);
              }
            }
            const pointObj = {
              name: typeKey,
              type: 'line',
              data: num,
              symbol: 'circle',
              symbolSize: 4,
            };
            this.itemData.push(pointObj)
          };
          this.drawBottomChart();
        }
      }
    }

饼图的数据都是从中获取的,就不说了,到这里,所有的图表就都完成了,晚安吧