feat(ems): 添加产线选择和总表功能，增强表格配置选项

- 在电表管理页面添加产线选择下拉框和总表开关
- 在能耗表格页面添加配置选项：显示求和行、分表求和、误差计算
- 实现表格汇总行计算功能
- 添加误差和误差率计算功能

klp-ui/src/views/ems/table/index.vue

@@ -18,7 +18,7 @@
 
       <div v-else>
         <!-- 增加日期筛选，默认选中当前月份，用户可以切换月份 -->
-        <div style="margin-bottom: 16px; display: flex; align-items: center;">
+        <div style="margin-bottom: 16px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px;">
           <el-date-picker
             v-model="selectedMonth"
             type="month"
@@ -29,10 +29,17 @@
             style="width: 150px;"
           />
 
-          <el-button style="margin-left: 10px;" icon="el-icon-refresh" @click="handleRefresh">刷新</el-button>
+          <el-button icon="el-icon-refresh" @click="handleRefresh">刷新</el-button>
+        </div>
+
+        <!-- 配置选项 -->
+        <div style="margin-bottom: 16px; padding: 10px; background: #f5f7fa; border-radius: 4px;">
+          <el-checkbox v-model="configOptions.showSumRow">显示求和行</el-checkbox>
+          <el-checkbox v-model="configOptions.sumSubMeters" style="margin-left: 20px;">对分表求和（排除总表）</el-checkbox>
+          <el-checkbox v-model="configOptions.showError" style="margin-left: 20px;" :disabled="!canShowError">显示误差计算</el-checkbox>
         </div>
         
-        <el-table :data="tableData" style="width: 100%" border>
+        <el-table :data="tableData" style="width: 100%" border :show-summary="configOptions.showSumRow" :summary-method="getSummaries">
           <el-table-column prop="date" label="日期" width="120" />
           <el-table-column v-for="meter in meters" :key="meter.meterId" :prop="`meter_${meter.meterId}`"
             :label="meter.meterCode">
@@ -41,6 +48,24 @@
                 @change="(e) => handleCellChange(scope.row, meter.meterId, e)" />
             </template>
           </el-table-column>
+          <!-- 分表求和列 -->
+          <el-table-column v-if="configOptions.sumSubMeters" label="分表合计" width="120">
+            <template slot-scope="scope">
+              {{ getSubMetersSum(scope.row).toFixed(2) }}
+            </template>
+          </el-table-column>
+          <!-- 误差列 -->
+          <el-table-column v-if="configOptions.showError && canShowError" label="误差" width="120">
+            <template slot-scope="scope">
+              {{ getRowError(scope.row).toFixed(2) }}
+            </template>
+          </el-table-column>
+          <!-- 误差率列 -->
+          <el-table-column v-if="configOptions.showError && canShowError" label="误差率" width="120">
+            <template slot-scope="scope">
+              {{ getRowErrorPercent(scope.row).toFixed(2) }}%
+            </template>
+          </el-table-column>
         </el-table>
       </div>
     </div>
@@ -72,8 +97,21 @@ export default {
       rightLoading: false,
       selectedMonth: currentMonth,
       originalData: [], // 用于存储原始数据
+      configOptions: {
+        showSumRow: false,
+        sumSubMeters: false,
+        showError: false
+      },
+      sumRowData: {} // 存储求和行数据
     };
   },
+  computed: {
+    // 判断是否可以显示误差计算（需要有且仅有一个总表）
+    canShowError() {
+      const totalMeters = this.meters.filter(m => m.isTotalMeter === 1);
+      return totalMeters.length === 1;
+    }
+  },
   mounted() {
     this.loadEnergyTypes();
   },
@@ -277,6 +315,86 @@ export default {
     handleAddMeter() {
       this.$router.push({ path: '/ems/meter/manage' });
     },
+
+    // 计算一行中所有分表的和
+    getSubMetersSum(row) {
+      const subMeters = this.meters.filter(m => m.isTotalMeter !== 1);
+      return subMeters.reduce((sum, meter) => {
+        const value = Number(row[`meter_${meter.meterId}`]) || 0;
+        return sum + value;
+      }, 0);
+    },
+
+    // 计算一行的误差（总表 - 分表合计）
+    getRowError(row) {
+      if (!this.canShowError) return 0;
+      const totalMeter = this.meters.find(m => m.isTotalMeter === 1);
+      const totalValue = Number(row[`meter_${totalMeter.meterId}`]) || 0;
+      const subMetersSum = this.getSubMetersSum(row);
+      return totalValue - subMetersSum;
+    },
+
+    // 计算一行的误差百分比
+    getRowErrorPercent(row) {
+      if (!this.canShowError) return 0;
+      const totalMeter = this.meters.find(m => m.isTotalMeter === 1);
+      const totalValue = Number(row[`meter_${totalMeter.meterId}`]) || 0;
+      if (totalValue === 0) return 0;
+      const error = this.getRowError(row);
+      return (error / totalValue) * 100;
+    },
+
+    // 计算表格汇总行
+    getSummaries(param) {
+      const { columns, data } = param;
+      const sums = [];
+      
+      // 如果不显示求和行，返回空数组
+      if (!this.configOptions.showSumRow) {
+        return sums;
+      }
+
+      columns.forEach((column, index) => {
+        if (index === 0) {
+          sums[index] = '合计';
+          return;
+        }
+
+        // 获取当前列对应的表计
+        const prop = column.property;
+        if (prop && prop.startsWith('meter_')) {
+          // 计算该列的和
+          const values = data.map(item => Number(item[prop]) || 0);
+          const sum = values.reduce((prev, curr) => prev + curr, 0);
+          sums[index] = sum.toFixed(2);
+          return;
+        }
+
+        // 分表合计列的汇总
+        if (column.label === '分表合计' && this.configOptions.sumSubMeters) {
+          const sum = data.reduce((total, row) => total + this.getSubMetersSum(row), 0);
+          sums[index] = sum.toFixed(2);
+          return;
+        }
+
+        // 误差列的汇总
+        if (column.label === '误差' && this.configOptions.showError && this.canShowError) {
+          const sum = data.reduce((total, row) => total + this.getRowError(row), 0);
+          sums[index] = sum.toFixed(2);
+          return;
+        }
+
+        // 误差率列不进行汇总
+        if (column.label === '误差率') {
+          sums[index] = '-';
+          return;
+        }
+
+        sums[index] = '';
+      });
+
+      return sums;
+    },
   }
 };
 </script>