目錄1.固定合并2. 動態(tài)合并相同數(shù)據(jù)單元格（所有列）3. 動態(tài)合并相同數(shù)據(jù)單元格（指定列）4. 動態(tài)合并相同數(shù)據(jù)單元格（指定列+合并條件）完整代碼1.固定合并官方挺提供的合并具體某行列的方法:el-table合并行或列通過給table傳入span-method方法可以實現(xiàn)合并行或列，方法的參數(shù)是一個對象，里面包含當前行row、當前列column、當前行號rowIndex、當前列號columnIndex四個屬性。

該函數(shù)可以返回一個包含兩個元素的數(shù)組，第一個元素代表rowspan，第二個元素代表colspan。 也可以返回一個鍵名為rowspan和colspan的對象。

<template> <div> <el-table :data='tableData' :span-method='arraySpanMethod' border style='width: 100%'> <el-table-columnprop='id'label='ID'width='180'> </el-table-column> <el-table-columnprop='name'label='姓名'> </el-table-column> <el-table-columnprop='amount1'sortablelabel='數(shù)值 1'> </el-table-column> <el-table-columnprop='amount2'sortablelabel='數(shù)值 2'> </el-table-column> <el-table-columnprop='amount3'sortablelabel='數(shù)值 3'> </el-table-column> </el-table> <el-table :data='tableData' :span-method='objectSpanMethod' border style='width: 100%; margin-top: 20px'> <el-table-columnprop='id'label='ID'width='180'> </el-table-column> <el-table-columnprop='name'label='姓名'> </el-table-column> <el-table-columnprop='amount1'label='數(shù)值 1（元）'> </el-table-column> <el-table-columnprop='amount2'label='數(shù)值 2（元）'> </el-table-column> <el-table-columnprop='amount3'label='數(shù)值 3（元）'> </el-table-column> </el-table> </div></template><script> export default { data() { return {tableData: [{ id: '12987122', name: '王小虎', amount1: '234', amount2: '3.2', amount3: 10}, { id: '12987123', name: '王小虎', amount1: '165', amount2: '4.43', amount3: 12}, { id: '12987124', name: '王小虎', amount1: '324', amount2: '1.9', amount3: 9}, { id: '12987125', name: '王小虎', amount1: '621', amount2: '2.2', amount3: 17}, { id: '12987126', name: '王小虎', amount1: '539', amount2: '4.1', amount3: 15}] }; }, methods: { arraySpanMethod({ row, column, rowIndex, columnIndex }) {if (rowIndex % 2 === 0) { if (columnIndex === 0) { return [1, 2]; } else if (columnIndex === 1) { return [0, 0]; }} }, objectSpanMethod({ row, column, rowIndex, columnIndex }) {if (columnIndex === 0) { if (rowIndex % 2 === 0) { return { rowspan: 2, colspan: 1 }; } else { return { rowspan: 0, colspan: 0 }; }} } } };</script>

運行效果：

缺點：這種只適合寫死的數(shù)據(jù)和固定的表格行列，無法動態(tài)判斷單元格數(shù)據(jù)是否相等再合并；

2. 動態(tài)合并相同數(shù)據(jù)單元格（所有列）可以對所有相同數(shù)據(jù)的列，進行動態(tài)合并此方法適合需要合并所有的相同數(shù)據(jù)的單元格<template> <div> <el-table :data='tableData' :span-method='objectSpanMethod' border :header-cell-style='{ textAlign: 'center', backgroundColor: '#F5F7FA' }' > <el-table-column prop='School' label='學校' align='center'> </el-table-column> <el-table-column prop='Grade' label='年級' /> <el-table-column prop='Class' label='班級' /> <el-table-column prop='Name' label='姓名' /> <el-table-column prop='Chinese' label='語文' /> <el-table-column prop='Math' label='數(shù)學' /> <el-table-column prop='English' label='英語' /> </el-table> </div></template><script>export default { data() { return { // 存放所有的表頭 一定要與tableData一致 colFields: ['School','Grade','Class','Name','Chinese','Math','English', ], spanArr: [], //存儲合并單元格的開始位置 // 表格數(shù)據(jù) tableData: [// 一年級{ School: '第一小學', Grade: '1年級', Class: '1班', Name: '張三', Chinese: '90', Math: '100', English: '80',},{ School: '第一小學', Grade: '1年級', Class: '2班', Name: '李四', Chinese: '90', Math: '85', English: '80',},{ School: '第一小學', Grade: '1年級', Class: '3班', Name: '王五', Chinese: '79', Math: '100', English: '80',},// 二年級{ School: '第一小學', Grade: '2年級', Class: '1班', Name: '趙六', Chinese: '95', Math: '100', English: '80',},{ School: '第一小學', Grade: '2年級', Class: '2班', Name: '錢八', Chinese: '98', Math: '85', English: '80',},{ School: '第一小學', Grade: '2年級', Class: '3班', Name: '陳九', Chinese: '79', Math: '100', English: '80',},// 三年級{ School: '第一小學', Grade: '3年級', Class: '1班', Name: '黃十', Chinese: '91', Math: '88', English: '80',},{ School: '第一小學', Grade: '3年級', Class: '2班', Name: '魏一', Chinese: '90', Math: '86', English: '87',},{ School: '第一小學', Grade: '3年級', Class: '3班', Name: '楊二', Chinese: '79', Math: '99', English: '80',}, ], }; }, methods: { /** * 分析每一列，找出相同的 * @param data */ getSpanArr() { 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++) { // 當前和上一次的一樣 // 1. 合并所有列的相同數(shù)據(jù)單元格 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, // 合并幾行colspan: 1, // 合并幾列,我這里只是跨行合并,不跨列合并,所以用的1 }; beforeItem.rowspan = 0; beforeItem.colspan = 0; } else { // rowspan 和 colspan 都為1表格此單元格不合并 this.spanArr[row * this.colFields.length + j] = {rowspan: 1,colspan: 1, }; } }} } // 對數(shù)據(jù)進行倒序 let stack = []; for (let i = 0; i < this.colFields.length; i++) {for (let j = 0; j < this.tableData.length; j++) { // console.log('i=' + i + ' j=' + 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; } } }} } // console.log(this.spanArr); }, objectSpanMethod({ row, column, rowIndex, columnIndex }) { // console.log(this.spanArr[rowIndex * this.colFields.length + columnIndex]); return this.spanArr[rowIndex * this.colFields.length + columnIndex]; }, }, mounted() { this.getSpanArr(); },};</script><style lang='scss' scoped></style>

效果:

我們可以看到，所有列，只要數(shù)據(jù)相同的單元格都被合并了，包括我不想合并的單元格，這時候就要指定合并的列了

3. 動態(tài)合并相同數(shù)據(jù)單元格（指定列）

只需要加個if判斷即可指定要合并哪些列

// 這里只放了部分代碼,除了加了個if,其他代碼和上面的一樣 getSpanArr() { 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++) { // 當前和上一次的一樣 // 合并所有列的相同數(shù)據(jù)單元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 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, colspan: 1,};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都為1表格此單元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} }

效果:這樣就只合并了我們指定的那幾列了

4. 動態(tài)合并相同數(shù)據(jù)單元格（指定列+合并條件）

有時候我們會遇到不想合并的單元格，比如下面這種情況：

按常理來說，不同小學的數(shù)據(jù)應該是不做合并才對，正確是這種：

這時候就需要加上一些自定義的合并條件了：

getSpanArr() { 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++) { // 當前和上一次的一樣 // 合并所有列的相同數(shù)據(jù)單元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 if (this.tableData[row]['School'] !== this.tableData[row - 1]['School'] ) { // 哪些不合并:School不一樣的,不合并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,// 合并幾列 colspan: 1,// 合并幾行};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都為1表格此單元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} } // console.log(this.spanArr); },

這時候再看，就是我們想要的效果了

完整代碼

最后附完整代碼：

<template> <div> <el-table :data='tableData' :span-method='objectSpanMethod' border :header-cell-style='{ textAlign: 'center', backgroundColor: '#F5F7FA' }' > <el-table-column prop='School' label='學校' align='center'> </el-table-column> <el-table-column prop='Grade' label='年級' /> <el-table-column prop='Class' label='班級' /> <el-table-column prop='Name' label='姓名' /> <el-table-column prop='Chinese' label='語文' /> <el-table-column prop='Math' label='數(shù)學' /> <el-table-column prop='English' label='英語' /> </el-table> </div></template><script>export default { data() { return { // 存放所有的表頭 一定要與tableData一致 colFields: ['School','Grade','Class','Name','Chinese','Math','English', ], spanArr: [], //存儲合并單元格的開始位置 // 表格數(shù)據(jù) tableData: [// 一年級{ School: '第一小學', Grade: '1年級', Class: '1班', Name: '張三', Chinese: '90', Math: '100', English: '80',},{ School: '第一小學', Grade: '1年級', Class: '1班', Name: '張偉', Chinese: '90', Math: '99', English: '89',},{ School: '第一小學', Grade: '1年級', Class: '2班', Name: '李四', Chinese: '90', Math: '85', English: '80',},{ School: '第一小學', Grade: '1年級', Class: '3班', Name: '王五', Chinese: '79', Math: '100', English: '80',},// 二年級{ School: '第一小學', Grade: '2年級', Class: '1班', Name: '趙六', Chinese: '95', Math: '100', English: '80',},{ School: '第一小學', Grade: '2年級', Class: '2班', Name: '錢八', Chinese: '98', Math: '85', English: '80',},{ School: '第一小學', Grade: '2年級', Class: '3班', Name: '陳九', Chinese: '79', Math: '100', English: '100',},// 三年級{ School: '第一小學', Grade: '3年級', Class: '1班', Name: '黃十', Chinese: '91', Math: '88', English: '80',},{ School: '第一小學', Grade: '3年級', Class: '2班', Name: '魏一', Chinese: '90', Math: '86', English: '87',},{ School: '第一小學', Grade: '3年級', Class: '3班', Name: '楊二', Chinese: '79', Math: '99', English: '80',},// 第二小學{ School: '第二小學', Grade: '3年級', Class: '3班', Name: '袁零', Chinese: '79', Math: '99', English: '80',}, ], }; }, methods: { /** * 分析每一列，找出相同的 * @param data */ getSpanArr() { 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++) { // 當前和上一次的一樣 // 合并所有列的相同數(shù)據(jù)單元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 if (this.tableData[row]['School'] !== this.tableData[row - 1]['School'] ) { // 哪些不合并:School不一樣的,不合并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,// 合并幾列 colspan: 1,// 合并幾行};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都為1表格此單元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} } // 對數(shù)據(jù)進行倒序 let stack = []; for (let i = 0; i < this.colFields.length; i++) {for (let j = 0; j < this.tableData.length; j++) { // console.log('i=' + i + ' j=' + 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; } } }} } // console.log(this.spanArr); }, objectSpanMethod({ row, column, rowIndex, columnIndex }) { // console.log(this.spanArr[rowIndex * this.colFields.length + columnIndex]); return this.spanArr[rowIndex * this.colFields.length + columnIndex]; }, }, mounted() { this.getSpanArr(); },};</script><style lang='scss' scoped></style>

參考:https://blog.csdn.net/u010735120/article/details/122184493

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