[feature]{ExportExcel}:加入一个前端导出excel模块

package.json

@@ -21,6 +21,7 @@
     "normalize.css": "^8.0.1",
     "nprogress": "^0.2.0",
     "screenfull": "3.3.3",
+    "script-loader": "^0.7.2",
     "svg-sprite-loader": "^4.1.3",
     "vue": "^2.5.21",
     "vue-awesome": "^3.2.0",
@@ -29,7 +30,9 @@
     "vuedraggable": "^2.16.0",
     "vuetify": "^1.5.1",
     "vuex": "^3.0.1",
-    "vuex-persistedstate": "^2.5.4"
+    "vuex-persistedstate": "^2.5.4",
+    "xlsx": "0.14.1",
+    "file-saver": "2.0.1"
   },
   "devDependencies": {
     "@vue/cli-plugin-babel": "^3.3.0",

src/components/CrudTable/CrudTable.vue

@@ -106,6 +106,13 @@ export default {
     };
   },
   watch: {
+    list: {
+      immediate: true,
+      deep: true,
+      handler(val) {
+        this.$emit('update:tableList', val)
+      },
+    },
     tableParams: {
       deep: true,
       handler(val) {

src/components/CrudTable/components/props.js

@@ -67,4 +67,8 @@ export default {
     type: String,
     default: null,
   },
+  tableList: {
+    type: Array,
+    default: () => [],
+  },
 };

src/utils/Export2Excel.js

@@ -0,0 +1,220 @@
+/* eslint-disable */
+require('script-loader!file-saver');
+import XLSX from 'xlsx'
+
+function generateArray(table) {
+  var out = [];
+  var rows = table.querySelectorAll('tr');
+  var ranges = [];
+  for (var R = 0; R < rows.length; ++R) {
+    var outRow = [];
+    var row = rows[R];
+    var columns = row.querySelectorAll('td');
+    for (var C = 0; C < columns.length; ++C) {
+      var cell = columns[C];
+      var colspan = cell.getAttribute('colspan');
+      var rowspan = cell.getAttribute('rowspan');
+      var cellValue = cell.innerText;
+      if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;
+
+      //Skip ranges
+      ranges.forEach(function (range) {
+        if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {
+          for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
+        }
+      });
+
+      //Handle Row Span
+      if (rowspan || colspan) {
+        rowspan = rowspan || 1;
+        colspan = colspan || 1;
+        ranges.push({
+          s: {
+            r: R,
+            c: outRow.length
+          },
+          e: {
+            r: R + rowspan - 1,
+            c: outRow.length + colspan - 1
+          }
+        });
+      };
+
+      //Handle Value
+      outRow.push(cellValue !== "" ? cellValue : null);
+
+      //Handle Colspan
+      if (colspan)
+        for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
+    }
+    out.push(outRow);
+  }
+  return [out, ranges];
+};
+
+function datenum(v, date1904) {
+  if (date1904) v += 1462;
+  var epoch = Date.parse(v);
+  return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
+}
+
+function sheet_from_array_of_arrays(data, opts) {
+  var ws = {};
+  var range = {
+    s: {
+      c: 10000000,
+      r: 10000000
+    },
+    e: {
+      c: 0,
+      r: 0
+    }
+  };
+  for (var R = 0; R != data.length; ++R) {
+    for (var C = 0; C != data[R].length; ++C) {
+      if (range.s.r > R) range.s.r = R;
+      if (range.s.c > C) range.s.c = C;
+      if (range.e.r < R) range.e.r = R;
+      if (range.e.c < C) range.e.c = C;
+      var cell = {
+        v: data[R][C]
+      };
+      if (cell.v == null) continue;
+      var cell_ref = XLSX.utils.encode_cell({
+        c: C,
+        r: R
+      });
+
+      if (typeof cell.v === 'number') cell.t = 'n';
+      else if (typeof cell.v === 'boolean') cell.t = 'b';
+      else if (cell.v instanceof Date) {
+        cell.t = 'n';
+        cell.z = XLSX.SSF._table[14];
+        cell.v = datenum(cell.v);
+      } else cell.t = 's';
+
+      ws[cell_ref] = cell;
+    }
+  }
+  if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);
+  return ws;
+}
+
+function Workbook() {
+  if (!(this instanceof Workbook)) return new Workbook();
+  this.SheetNames = [];
+  this.Sheets = {};
+}
+
+function s2ab(s) {
+  var buf = new ArrayBuffer(s.length);
+  var view = new Uint8Array(buf);
+  for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
+  return buf;
+}
+
+export function export_table_to_excel(id) {
+  var theTable = document.getElementById(id);
+  var oo = generateArray(theTable);
+  var ranges = oo[1];
+
+  /* original data */
+  var data = oo[0];
+  var ws_name = "SheetJS";
+
+  var wb = new Workbook(),
+    ws = sheet_from_array_of_arrays(data);
+
+  /* add ranges to worksheet */
+  // ws['!cols'] = ['apple', 'banan'];
+  ws['!merges'] = ranges;
+
+  /* add worksheet to workbook */
+  wb.SheetNames.push(ws_name);
+  wb.Sheets[ws_name] = ws;
+
+  var wbout = XLSX.write(wb, {
+    bookType: 'xlsx',
+    bookSST: false,
+    type: 'binary'
+  });
+
+  saveAs(new Blob([s2ab(wbout)], {
+    type: "application/octet-stream"
+  }), "test.xlsx")
+}
+
+export function export_json_to_excel({
+  multiHeader = [],
+  header,
+  data,
+  filename,
+  merges = [],
+  autoWidth = true,
+  bookType=  'xlsx'
+} = {}) {
+  /* original data */
+  filename = filename || 'excel-list'
+  data = [...data]
+  data.unshift(header);
+
+  for (let i = multiHeader.length-1; i > -1; i--) {
+    data.unshift(multiHeader[i])
+  }
+
+  var ws_name = "SheetJS";
+  var wb = new Workbook(),
+    ws = sheet_from_array_of_arrays(data);
+
+  if (merges.length > 0) {
+    if (!ws['!merges']) ws['!merges'] = [];
+    merges.forEach(item => {
+      ws['!merges'].push(XLSX.utils.decode_range(item))
+    })
+  }
+
+  if (autoWidth) {
+    /*设置worksheet每列的最大宽度*/
+    const colWidth = data.map(row => row.map(val => {
+      /*先判断是否为null/undefined*/
+      if (val == null) {
+        return {
+          'wch': 10
+        };
+      }
+      /*再判断是否为中文*/
+      else if (val.toString().charCodeAt(0) > 255) {
+        return {
+          'wch': val.toString().length * 2
+        };
+      } else {
+        return {
+          'wch': val.toString().length
+        };
+      }
+    }))
+    /*以第一行为初始值*/
+    let result = colWidth[0];
+    for (let i = 1; i < colWidth.length; i++) {
+      for (let j = 0; j < colWidth[i].length; j++) {
+        if (result[j]['wch'] < colWidth[i][j]['wch']) {
+          result[j]['wch'] = colWidth[i][j]['wch'];
+        }
+      }
+    }
+    ws['!cols'] = result;
+  }
+
+  /* add worksheet to workbook */
+  wb.SheetNames.push(ws_name);
+  wb.Sheets[ws_name] = ws;
+
+  var wbout = XLSX.write(wb, {
+    bookType: bookType,
+    bookSST: false,
+    type: 'binary'
+  });
+  saveAs(new Blob([s2ab(wbout)], {
+    type: "application/octet-stream"
+  }), `${filename}.${bookType}`);
+}

src/views/SIX/Count.vue

@@ -1,32 +1,82 @@
 <template>
   <div class="widget-box">
-    <el-date-picker v-model="time"
+
+   <div>
+      <el-date-picker v-model="time"
                     type="month"
                     value-format="yyyy-MM"
                     placeholder="选择查询日期">
     </el-date-picker>
     <el-button icon="el-icon-search"
                @click="Refresh"></el-button>
-    <el-button icon="el-icon-printer"
-               @click="print">打印报表</el-button>
+
+      <FilenameOption v-model="filename" />
+      <BookTypeOption v-model="bookType" />
+      <el-button :loading="downloadLoading" style="margin:0 0 20px 20px;" type="primary" icon="document" @click="handleDownload">
+      导出报表
+      </el-button>
+    </div>
+
     <CrudTable ref="countTable"
                :customForFetchData="getCountData"
                :showPagination="false"
                tableDesignerName="count"
                tableName="SIX_Count"
                toolbarButton=""
+               :tableList.sync="list"
                handleButton=""></CrudTable>
   </div>
 </template>
 <script>
+import { parseTime } from '@/utils/index'
+// options components
+import FilenameOption from './components/FilenameOption'
+import BookTypeOption from './components/BookTypeOption'
+
+
 export default {
   name: 'Count',
+  components: { FilenameOption, BookTypeOption },
+
   data() {
     return {
       time: '2019-04',
+
+      list: null,
+      listLoading: true,
+      downloadLoading: false,
+      filename: '',
+      autoWidth: true,
+      bookType: 'xlsx',
+
     };
   },
   methods: {
+    handleDownload() {
+      this.downloadLoading = true
+      import('@/utils/Export2Excel').then((excel) => {
+        const tHeader = ['姓名', '部门', '月份', '基础工资', '加班工资', '补贴']
+        const filterVal = ['name', 'deptname', 'date', 'overtimepay', 'pension']
+        const { list } = this
+        const data = this.formatJson(filterVal, list)
+        excel.export_json_to_excel({
+          header: tHeader,
+          data,
+          filename: this.filename,
+          autoWidth: this.autoWidth,
+          bookType: this.bookType,
+        })
+        this.downloadLoading = false
+      })
+    },
+    formatJson(filterVal, jsonData) {
+      return jsonData.map(v => filterVal.map((j) => {
+        if (j === 'timestamp') {
+          return parseTime(v[j])
+        }
+        return v[j]
+      }))
+    },
     getCountData() {
       return this.crud('count', 'six_salary', {
         time: this.time,

src/views/SIX/components/BookTypeOption.vue

@@ -0,0 +1,39 @@
+<template>
+  <div style="display:inline-block;">
+    <label class="radio-label" style="margin-left:50px;">文件类型 </label>
+    <el-select v-model="bookType" style="width:120px!important;">
+      <el-option
+        v-for="item in options"
+        :key="item"
+        :label="item"
+        :value="item"
+      />
+    </el-select>
+  </div>
+</template>
+
+<script>
+export default {
+  props: {
+    value: {
+      type: String,
+      default: 'xlsx',
+    },
+  },
+  data() {
+    return {
+      options: ['xlsx', 'csv', 'txt'],
+    }
+  },
+  computed: {
+    bookType: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      },
+    },
+  },
+}
+</script>