1 <template>
  2   <el-table :data="scheduleList" :span-method="objectSpanMethod" border>
  3     <el-table-column prop="date" label="时间" width="200" />
  4     <el-table-column prop="journey" label="行程" width="600" />
  5     <el-table-column prop="lecturer" label="讲师" />
  6   </el-table>
  7 </template>
  8 
  9 <script>
 10 export default {
 11   data() {
 12     return {
 13       scheduleList: [
 14         {
 15           date: "第一天",
 16           journey: "报道",
 17           lecturer: "",
 18         },
 19         {
 20           date: "第二天",
 21           journey: "企业生产安全应急预案数字化推演及复盘",
 22           lecturer: "国家危化品应急救援基地--林俊",
 23         },
 24         {
 25           date: "第三天",
 26           journey: "火灾应急处置",
 27           lecturer: "国家危化品应急救援基地—张学军",
 28         },
 29         {
 30           date: "第三天",
 31           journey: "中毒窒息事故应急处置",
 32           lecturer: "中化岙山事故应急处置师资",
 33         },
 34         {
 35           date: "第四天",
 36           journey: "人员触电事故应急处置",
 37           lecturer: "中化岙山事故应急处置师资",
 38         },
 39         {
 40           date: "第四天",
 41           journey: "泄漏事故应急处置",
 42           lecturer: "中化岙山事故应急处置师资",
 43         },
 44         {
 45           date: "第四天",
 46           journey: "问题交流",
 47           lecturer: "中化岙山事故应急处置师资",
 48         },
 49         {
 50           date: "第五天",
 51           journey: "受限空间作业管理",
 52           lecturer: "中化岙山危险作业内训师",
 53         },
 54         {
 55           date: "第五天",
 56           journey: "高处作业管理",
 57           lecturer: "中化岙山危险作业内训师",
 58         },
 59         {
 60           date: "第五天",
 61           journey: "动火作业管理",
 62           lecturer: "中化岙山危险作业内训师",
 63         },
 64         {
 65           date: "第五天",
 66           journey: "临时用电作业管理",
 67           lecturer: "中化岙山危险作业内训师",
 68         },
 69         {
 70           date: "第五天",
 71           journey: "问题交流与讨论",
 72           lecturer: "中化岙山危险作业内训师",
 73         },
 74         {
 75           date: "第六天",
 76           journey: "回城",
 77           lecturer: "",
 78         },
 79       ],
 80       rowIndex: "-1",
 81       orderIndexArr: [],
 82     };
 83   },
 84   methods: {
 85       // 获取相同编号的数组
 86       getNumber() {
 87         const orderObj = {}
 88         this.scheduleList.forEach((item, index) => {
 89           item.indexRow = index
 90           // 通过date关键字
 91           if (orderObj[item.date]) {
 92             orderObj[item.date].push(index)
 93           } else {
 94             orderObj[item.date] = []
 95             orderObj[item.date].push(index)
 96           }
 97         });
 98         // 将数组长度大于1的值 存储到this.orderIndexArr（也就是需要合并的项）
 99         Object.keys(orderObj).forEach((key) => {
100           if (orderObj[key].length > 1) {
101             this.orderIndexArr.push(orderObj[key])
102           }
103         })
104       },
105       
106       // 获取相同编号的数组
107       getOrderNumber() {
108         const orderObj = {}
109         this.scheduleList.forEach((item, index) => {
110           item.rowIndex = index
111           if (orderObj[item.date]) {
112             orderObj[item.date].push(index)
113           } else {
114             orderObj[item.date] = [];
115             orderObj[item.date].push(index)
116           }
117         })
118         // 将数组长度大于1的值 存储到this.orderIndexArr（也就是需要合并的项）
119         Object.keys(orderObj).forEach((key) => {
120           if (orderObj[key].length > 1) {
121             this.orderIndexArr.push(orderObj[key])
122           }
123         });
124       },
125       objectSpanMethod({ row, column, rowIndex, columnIndex }) {
126         if (columnIndex === 0) {
127           for (let i = 0; i < this.orderIndexArr.length; i += 1) {
128             let element = this.orderIndexArr[i];
129             for (let j = 0; j < element.length; j += 1) {
130               let item = element[j];
131               if (rowIndex === item) {
132                 if (j === 0) {
133                   return {
134                     rowspan: element.length,
135                     colspan: 1
136                   }
137                 }
138                 if (j !== 0) {
139                   return {
140                     rowspan: 0,
141                     colspan: 0
142                   }
143                 }
144               }
145             }
146           }
147         }
148       },
149   },
150   mounted() {
151     this.getOrderNumber()
152   }
153 }
154 </script>