增加 excel 导出的合并单元格选项

增加 excel 导出的第一行标题选项


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src/pages/demo/plugins/export/table.vue

@@ -50,7 +50,9 @@ export default {
     exportExcel () {
       this.$export.excel({
         columns: this.table.columns,
-        data: this.table.data
+        data: this.table.data,
+        header: '导出 Excel',
+        merges: ['A1', 'E1']
       })
         .then(() => {
           this.$message('导出表格成功')

src/plugin/export/_export2Excel.js

@@ -124,16 +124,22 @@ export function export_table_to_excel(id) {
 function formatJson(jsonData) {
     console.log(jsonData)
 }
-export function export_json_to_excel(th, jsonData, defaultTitle) {
+export function export_json_to_excel(th, jsonData, defaultTitle, options = { merges: [], header: null }) {
 
     /* original data */
 
     var data = jsonData;
     data.unshift(th);
+    if (options.header) data.unshift([options.header]);
     var ws_name = "SheetJS";
 
     var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);
 
+    /* add merges area to worksheet */
+    let { merges } = options;
+    if (typeof merges[0] == 'string' && merges.length == 2) merges = [merges] // just one # ['A1', 'C1'] = > [['A1', 'C1']]
+    merges = merges.map(i => i instanceof Array ? { s: i[0], e: i[1] } : i); // be sort :) # ['A1', 'C1'] => { s: 'A1', e: 'C3' }
+    ws['!merges'] = merges;
 
     /* add worksheet to workbook */
     wb.SheetNames.push(ws_name);

src/plugin/export/index.js

@@ -36,7 +36,9 @@ export default {
           const paramsDefault = {
             columns: [],
             data: [],
-            title: 'table'
+            title: 'table',
+            header: null,
+            merges: []
           }
           // 合并参数
           const _params = Object.assign({}, paramsDefault, params)
@@ -44,7 +46,7 @@ export default {
           const header = _params.columns.map(e => e.label)
           const data = _params.data.map(row => _params.columns.map(col => row[col.prop]))
           // 导出
-          Excel.export_json_to_excel(header, data, _params.title)
+          Excel.export_json_to_excel(header, data, _params.title, { merges: _params.merges, header: _params.header })
           // 完成
           resolve()
         })