FCAT | FCAT

需求：

上下行单元格内容相同的格子进行合并
第二列单元格合并需要在第一列单元格合并的范围内合并
中间有不需要单元格合并的列

html

<template>
  <div>
    <el-table
      :data="tableData"
      :span-method="objectSpanMethod"
      border
      :header-cell-style="{ textAlign: 'center', backgroundColor: '#F5F7FA' }"
    >
      <el-table-column
        prop="trailerPerson"
        label="拖车人姓名"
        align="center"
        width="150px"
      >
      </el-table-column>
      <el-table-column
        prop="trailerNum"
        label="拖车人数"
        align="center"
        width="80px"
      />
      <el-table-column
        prop="trailerTypeDic"
        label="拖车类型"
        align="center"
        width="150px"
      />
      <el-table-column
        prop="num"
        label="作业次数"
        align="center"
        width="50px"
      />
      <el-table-column
        prop="variousTypesOfAverages"
        label="各类拖车处置平均用时"
        align="center"
        width="150px"
      />
      <el-table-column
        prop="averageTime"
        label="平均处置用时"
        align="center"
        width="150px"
      />
    </el-table>
  </div>
</template>

<template>
  <div>
    <el-table
      :data="tableData"
      :span-method="objectSpanMethod"
      border
      :header-cell-style="{ textAlign: 'center', backgroundColor: '#F5F7FA' }"
    >
      <el-table-column
        prop="trailerPerson"
        label="拖车人姓名"
        align="center"
        width="150px"
      >
      </el-table-column>
      <el-table-column
        prop="trailerNum"
        label="拖车人数"
        align="center"
        width="80px"
      />
      <el-table-column
        prop="trailerTypeDic"
        label="拖车类型"
        align="center"
        width="150px"
      />
      <el-table-column
        prop="num"
        label="作业次数"
        align="center"
        width="50px"
      />
      <el-table-column
        prop="variousTypesOfAverages"
        label="各类拖车处置平均用时"
        align="center"
        width="150px"
      />
      <el-table-column
        prop="averageTime"
        label="平均处置用时"
        align="center"
        width="150px"
      />
    </el-table>
  </div>
</template>

export default {
  components: {},
  data () {
    return {
      // 存放所有的表头 一定要与tableData一致
      colFields: [
        "trailerPerson",
        "trailerNum",
        "num",
        "trailerTypeDic",
        "variousTypesOfAverages",
        "averageTime",
      ],
      spanArr: [], //存储合并单元格的开始位置
      // 表格数据
      tableData: [
        {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '小拖车',
          "num": 1,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '大拖车',
          "num": 2,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '大平板',
          "num": 3,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        },
        {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '小拖车',
          "num": 1,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '大拖车',
          "num": 2,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '大平板',
          "num": 3,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '老五',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        },
      ],
    }
  },
  creaetd() {

    this.getSpanArr();
  },
  methods: {
   
    getSpanArr () {
      this.tableData = JSON.parse(JSON.stringify(this.tableData_origin));
      for (let i = 0; i < this.tableData.length; i++) {
        let row = i;
        // let col = i % this.colCount;
        if (row === 0) {
          // i 表示行 j表示列
          for (let j = 0; j < this.colFields.length; j++) {
            this.spanArr[i * this.colFields.length + j] = {
              rowspan: 1,
              colspan: 1,
            };
          }
        } else {
          for (let j = 0; j < this.colFields.length; j++) {
            //  合并所有列的相同数据单元格
            if (
              this.colFields[j] == "trailerPerson" ||
              this.colFields[j] == "trailerNum" ||
              this.colFields[j] == "num" ||
              this.colFields[j] == "trailerTypeDic" ||
              this.colFields[j] == "variousTypesOfAverages" ||
              this.colFields[j] == "averageTime"
            ) { // 指定合并哪些列
              if (
                (this.tableData[row]["trailerPerson"] !==
                  this.tableData[row - 1]["trailerPerson"]) || (this.tableData[row]["trailerNum"] !==
                    this.tableData[row - 1]["trailerNum"] &&
                    this.colFields[j] == "averageTime")
                // 这里如果指定拖车人姓名和拖车人数同时作为限制的话，拖车人姓名也会被拖车人数切开，所以加一个trailerNum&&averageTime的限制
              ) { // 哪些不合并:trailerPerson、trailerNum不一样的,不合并
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              } else if (
                this.colFields[j] == "num" ||
                this.colFields[j] == "trailerTypeDic" ||
                this.colFields[j] == "variousTypesOfAverages"
              ) { // 首先，合并所有列的相同数据单元格，然后再剔除不需要合并的单元格，否则会出现显示BUG
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              } else if (
                this.tableData[row][this.colFields[j]] ===
                this.tableData[row - 1][this.colFields[j]]
              ) {
                let beforeItem =
                  this.spanArr[(row - 1) * this.colFields.length + j];
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1 + beforeItem.rowspan,// 合并几列
                  colspan: 1,// 合并几行
                };
                beforeItem.rowspan = 0;
                beforeItem.colspan = 0;
              } else {
                // rowspan 和 colspan 都为1表格此单元格不合并
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              }
            }
          }
        }
      }
      // 对数据进行倒序
      let stack = [];
      for (let i = 0; i < this.colFields.length; i++) {
        for (let j = 0; j < this.tableData.length; j++) {
          // i 表示列 j表示行
          if (j === 0) {
            if (this.spanArr[j * this.colFields.length + i].rowspan === 0) {
              stack.push(this.spanArr[j * this.colFields.length + i]);
            }
          } else {
            if (this.spanArr[j * this.colFields.length + i].rowspan === 0) {
              stack.push(this.spanArr[j * this.colFields.length + i]);
            } else {
              stack.push(this.spanArr[j * this.colFields.length + i]);
              while (stack.length > 0) {
                let pop = stack.pop();
                let len = stack.length;
                this.spanArr[(j - len) * this.colFields.length + i] = pop;
              }
            }
          }
        }
      }
    },
    objectSpanMethod ({ row, column, rowIndex, columnIndex }) {
      return this.spanArr[rowIndex * this.colFields.length + columnIndex];
    },
  }
}

export default {
  components: {},
  data () {
    return {
      // 存放所有的表头 一定要与tableData一致
      colFields: [
        "trailerPerson",
        "trailerNum",
        "num",
        "trailerTypeDic",
        "variousTypesOfAverages",
        "averageTime",
      ],
      spanArr: [], //存储合并单元格的开始位置
      // 表格数据
      tableData: [
        {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '小拖车',
          "num": 1,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '大拖车',
          "num": 2,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '大平板',
          "num": 3,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '单人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '双人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '张三',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        },
        {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '小拖车',
          "num": 1,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '大拖车',
          "num": 2,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '大平板',
          "num": 3,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '单人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '双人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '小拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '大拖车',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '大平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '李四',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        }, {
          "trailerPerson": '老五',
          "trailerNum": '多人',
          "trailerTypeDic": '小平板',
          "num": 4,
          "variousTypesOfAverages": 139.7143,
          "averageTime": 12,
        },
      ],
    }
  },
  creaetd() {

    this.getSpanArr();
  },
  methods: {
   
    getSpanArr () {
      this.tableData = JSON.parse(JSON.stringify(this.tableData_origin));
      for (let i = 0; i < this.tableData.length; i++) {
        let row = i;
        // let col = i % this.colCount;
        if (row === 0) {
          // i 表示行 j表示列
          for (let j = 0; j < this.colFields.length; j++) {
            this.spanArr[i * this.colFields.length + j] = {
              rowspan: 1,
              colspan: 1,
            };
          }
        } else {
          for (let j = 0; j < this.colFields.length; j++) {
            //  合并所有列的相同数据单元格
            if (
              this.colFields[j] == "trailerPerson" ||
              this.colFields[j] == "trailerNum" ||
              this.colFields[j] == "num" ||
              this.colFields[j] == "trailerTypeDic" ||
              this.colFields[j] == "variousTypesOfAverages" ||
              this.colFields[j] == "averageTime"
            ) { // 指定合并哪些列
              if (
                (this.tableData[row]["trailerPerson"] !==
                  this.tableData[row - 1]["trailerPerson"]) || (this.tableData[row]["trailerNum"] !==
                    this.tableData[row - 1]["trailerNum"] &&
                    this.colFields[j] == "averageTime")
                // 这里如果指定拖车人姓名和拖车人数同时作为限制的话，拖车人姓名也会被拖车人数切开，所以加一个trailerNum&&averageTime的限制
              ) { // 哪些不合并:trailerPerson、trailerNum不一样的,不合并
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              } else if (
                this.colFields[j] == "num" ||
                this.colFields[j] == "trailerTypeDic" ||
                this.colFields[j] == "variousTypesOfAverages"
              ) { // 首先，合并所有列的相同数据单元格，然后再剔除不需要合并的单元格，否则会出现显示BUG
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              } else if (
                this.tableData[row][this.colFields[j]] ===
                this.tableData[row - 1][this.colFields[j]]
              ) {
                let beforeItem =
                  this.spanArr[(row - 1) * this.colFields.length + j];
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1 + beforeItem.rowspan,// 合并几列
                  colspan: 1,// 合并几行
                };
                beforeItem.rowspan = 0;
                beforeItem.colspan = 0;
              } else {
                // rowspan 和 colspan 都为1表格此单元格不合并
                this.spanArr[row * this.colFields.length + j] = {
                  rowspan: 1,
                  colspan: 1,
                };
              }
            }
          }
        }
      }
      // 对数据进行倒序
      let stack = [];
      for (let i = 0; i < this.colFields.length; i++) {
        for (let j = 0; j < this.tableData.length; j++) {
          // i 表示列 j表示行
          if (j === 0) {
            if (this.spanArr[j * this.colFields.length + i].rowspan === 0) {
              stack.push(this.spanArr[j * this.colFields.length + i]);
            }
          } else {
            if (this.spanArr[j * this.colFields.length + i].rowspan === 0) {
              stack.push(this.spanArr[j * this.colFields.length + i]);
            } else {
              stack.push(this.spanArr[j * this.colFields.length + i]);
              while (stack.length > 0) {
                let pop = stack.pop();
                let len = stack.length;
                this.spanArr[(j - len) * this.colFields.length + i] = pop;
              }
            }
          }
        }
      }
    },
    objectSpanMethod ({ row, column, rowIndex, columnIndex }) {
      return this.spanArr[rowIndex * this.colFields.length + columnIndex];
    },
  }
}

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参考文献：el-table表格动态合并相同数据单元格(可指定列+自定义合并) https://blog.csdn.net/lymou/article/details/137470746

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