基于Vue2前端将网页数据转为Excel导出

首先，安装xlsx插件

    npm install xlsx

插件文档地址xlsx官方文档

在组件这中引入

import XLSX from 'xlsx';

所要导出的数据如下

// 设置面板标题
        settingPanelTitle:"",
        col:1,
        // 是否编辑
        isEdit:true,
        // 表头数据
        headerData: {
          "offerData":{
            name:"项目名称",
            spec:"规格",
            unit:"单位",
            count:"数量",
            unitPrice:"单价",
            total:"金额",
            cardNum:"卡数",
            comments:"备注"
          },
          "offerData1":{
            name:"项目名称1",
            spec:"规格1",
            unit:"单位1",
            count:"数量1",
            unitPrice:"单价1",
            total:"金额1",
            cardNum:"卡数1",
            comments:"备注1"
          }
        },
        // 表格数据
        allData:{
          "offerData":[
            {
              name:"柜体1",
              spec:"sasd",
              unit:"sadad",
              count:"5",
              unitPrice:"145",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"柜体2",
              spec:"sasd",
              unit:"sadad",
              count:"10",
              unitPrice:"522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"柜体3",
              spec:"sasd",
              unit:"sadad",
              count:"15",
              unitPrice:"142",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"柜体4",
              spec:"sasd",
              unit:"sadad",
              count:"20",
              unitPrice:"22",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"柜体5",
              spec:"sasd",
              unit:"sadad",
              count:"25",
              unitPrice:"222",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"柜体6",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"322",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            }
          ],
          "offerData1":[
            {
              name:"边框1",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"边框2",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"边框3",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"边框4",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"边框5",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            },
            {
              name:"边框6",
              spec:"sasd",
              unit:"sadad",
              count:"12",
              unitPrice:"14522",
              total:"",
              cardNum:5,
              comments:"大师大师多撒好低"
            }
          ]
        },
        //页头部分
        pageHead:{
          "offerData":[
            {
              name:"订单号：",
              isEdit:false
            },
            {
              name:"客户名称：",
              isEdit:false
            },
            {
              name:"销售日期：",
              isEdit:false
            },
            {
              name:"联系人：",
              isEdit:false
            },
            {
              name:"联系地址：",
              isEdit:false
            }
          ],
          "offerData1":[
            {
              name:"订单号1：",
              isEdit:false
            },
            {
              name:"客户名称1：",
              isEdit:false
            },
            {
              name:"销售日期1：",
              isEdit:false
            },
            {
              name:"联系人1：",
              isEdit:false
            },
            {
              name:"联系地址1：",
              isEdit:false
            }
          ]
        },
        // 页头部分内容
        pageHeadContent:{
          "offerData":[
            {
              name:"1231312313"
            },
            {
              name:"zoe"
            },
            {
              name:"2017-10-21"

            },
            {
              name:"joe"

            },
            {
              name:"beijibng"
            }
          ],
          "offerData1":[
            {
              name:"2231312313"
            },
            {
              name:"zoe1"
            },
            {
              name:"2017-10-21"

            },
            {
              name:"joe11"

            },
            {
              name:"beijibng111"
            }
          ]
        },
        options: {
          'offerData':{
            value: 'offerData',
            label: '报价明细单'
          }, 
          'offerData1':{
            value: 'offerData1',
            label: '报价明细单1'
          }
        },
        value: 'offerData', //选择的表格
        outputData:[], // 导出的数据
        outFile: '',  // 导出文件el

在ui层放个导出按钮和a标记模仿导出弹框

<button @click=" downloadFile(outputData)" id="export-table" class="btn btn-default">导出</button>
<a id="downlink"></a>

点击导出按钮触发

// 导出功能
      downloadFile: function (rs) { // 点击导出按钮
        //拼接导出的数据
        //1.拼接标题
        rs.push({title:this.settingPanelTitle});
        //2.拼接表头内容
        let headContent={};
        //页头项
        let pHead=this.pageHead[this.value];
        //页头项对应的内容
        let pHeadContent=this.pageHeadContent[this.value];

        for(let i in pHead){   
          headContent[i]=pHead[i].name+""+pHeadContent[i].name;
        }
        // console.log(headContent);
        rs.push(headContent);
        //3.拼接表头标题
        
        rs.push(this.headerData[this.value]);

        //4.拼接表内容
        rs.push(...this.allData[this.value]);
        //5.拼接表尾
        rs.push({title:"合计",value:this.settingData[this.value].totalPrice});
        // console.log(rs);
        this.downloadExl(rs, this.settingPanelTitle)
      },
      downloadExl: function (json, downName, type) {  // 导出到excel
        let tmpdata = [] // 用来保存转换好的json
        let maxLen=0; //最长的一行
        json.map((v, i) => {
          if(maxLen<Object.keys(v).length){
            maxLen=Object.keys(v).length;
          }
          return Object.keys(v).map((k, j) => {  //取出键对应的值

            return Object.assign({}, { //拼接输出的sheet
              v: v[k],
              position: (j > 25 ? this.getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1)
            })}
          )
        }).reduce((prev, next) =>  prev.concat(next)).forEach(function (v) {
          tmpdata[v.position] = { //转换输出json
            v: v.v
          }
        })
        let outputPos = Object.keys(tmpdata)  // 设置区域,比如表格从A1到D10
        // console.log(outputPos);
        
        // 转化最长的行所对应的区域码
        maxLen=this.getCharCol(maxLen);
        // console.log(maxLen+outputPos[outputPos.length-1].slice(1));
        let tmpWB = {
          SheetNames: ['mySheet'], // 保存的表标题
          Sheets: {
            'mySheet': Object.assign({},
              tmpdata, // 内容
              {
                '!ref': outputPos[0] + ':' + (maxLen+outputPos[outputPos.length-1].slice(1)) // 设置填充区域
              })
          }
        }
        let tmpDown = new Blob([this.s2ab(XLSX.write(tmpWB,
          {bookType: (type === undefined ? 'xlsx' : type), bookSST: false, type: 'binary'} // 这里的数据是用来定义导出的格式类型
        ))], {
          type: ''
        })  // 创建二进制对象写入转换好的字节流
        var href = URL.createObjectURL(tmpDown)  // 创建对象超链接
        this.outFile.download = downName + '.xlsx'  // 下载名称
        this.outFile.href = href  // 绑定a标签
        this.outFile.click()  // 模拟点击实现下载
        setTimeout(function () {  // 延时释放
          URL.revokeObjectURL(tmpDown) // 用URL.revokeObjectURL()来释放这个object URL
        }, 100)
      },
      // 转2进制
      s2ab(s){
        if(typeof ArrayBuffer !== 'undefined'){
          let buf =new ArrayBuffer(s.length);
          let view =new Uint8Array(buf);
          for(var i=0;i!=s.length;++i) view[i] =s.charCodeAt(i) & 0xFF;  
          return buf;      
        }else{
          let buf= new Array(s.length);
          for(var i=0;i!=s.length;++i) buf[i] =s.charCodeAt(i) & 0xFF;
          return buf;
        } 
      },
      // 将指定的自然数转换为26进制表示。映射关系：[0-25] -> [A-Z]。
      getCharCol(n) { 
        let s = ''
        let m = 0
        while (n > 0) {
          m = n % 26 + 1
          s = String.fromCharCode(m + 64) + s
          n = (n - m) / 26
        }
        return s
      },

实现效果