vue 按年份归类table

效果：

 


代码：

<div class="table tableSty" style="margin-top: 20px" v-for="item in stepByYearArr">
                        
  <el-table :data="item" border stripe style=" 99%" :cell-style="tableHeaderColor" :span-method="objectSpanMethod">
      <el-table-column v-for="(keyItem, index) in item[0]" :key="index" :prop="(index)"  align="center" ></el-table-column>
  </el-table>
</div>

methods:{
  tableHeaderColor({ row, column, rowIndex, columnIndex }) {
        if (rowIndex === 0) {
          return "color: #4f81bd;font-weight: bold ;";
        }
   },  
  objectSpanMethod({ row, column, rowIndex, columnIndex }){
        if (rowIndex === 2 || rowIndex === 3) {
          let len = Object.keys(row).length
          if(columnIndex === 0){
            return [1, 1];
          }else if(columnIndex === 1){
            return [1, len];
          }else{
              return [0, 0];
          }
        }
      },  
}

后台返回数据格式：

封装：

　　　　　　　　 let data = res.data.list
　　　　　　　　 let serverTr1 = {td0:"月份"}

              let serverTr2 = {td0:"营收(万)"}
              let serverTr3 = {td0:"月平均(万)"}
              let serverTr4 = {td0:"合计(万)"}
              let sum = 0
              let avg = 0
              data.sort(this.compareAsc("month"))
              for(let i = 0; i < data.length; i++){
                data[i].monthStr = data[i].month.substring(0,4)
                sum += data[i].step1OutputValue + data[i].step2OutputValue
                avg = ((sum/data.length)/10000).toFixed(2)
                serverTr1["td"+ (i*1+1)] = data[i].month;
                serverTr2["td"+ (i*1+1)] = ((data[i].step1OutputValue + data[i].step2OutputValue) / 10000).toFixed(2);
              }



            // 按年
              let sortDataArr = this.sortArr(data, 'monthStr')
              let stepByYearArr = []
              for(let i in sortDataArr) {
                let trLabel1 = {td1:'月份'}
                let trLabel2 = {td1:'营收(万)'}
                let trLabel3 = {td1:'月平均(万)'}
                let trLabel4 = {td1:'合计(万)'}
                let trsum = 0
                let travg = 0
                for (let j in sortDataArr[i]) {
                  trsum += sortDataArr[i][j].step1OutputValue + sortDataArr[i][j].step2OutputValue
                  travg = ((trsum/sortDataArr[i].length)/10000).toFixed(2)
                }

                for (let j in sortDataArr[i]) {
                  trLabel1["td"+ (j*1+2)] = sortDataArr[i][j].month
                  trLabel2["td"+ (j*1+2)] = ((sortDataArr[i][j].step1OutputValue + sortDataArr[i][j].step2OutputValue) / 10000).toFixed(2)
                  trLabel3["td"+ (j*1+2)] = travg;
                  trLabel4["td"+ (j*1+2)] = (trsum/10000).toFixed(2);
                }
                stepByYearArr.push([trLabel1, trLabel2, trLabel3, trLabel4])
              }
              this.stepByYearArr = stepByYearArr

最后的数据样式：

好了，大功告成啦