java导出json数据到excel中

时间 2019-12-07

标签 java 导出 json 数据 excel 栏目 Java 繁體版

原文原文链接

能够用前端js导，也能够使用后端的POI导出html

前端导出前端

base64(s) { return window.btoa(unescape(encodeURIComponent(s))) },

exportExcel() { // 前端导出excel
  console.log(this.showList)
  let str = '<tr><td>代理名称</td><td>allianceid</td><td>attachmentFileId</td>'
  for (let i = 0; i < this.showList.length; i++) {
    str += '<tr>'
    for (let item in this.showList[i]) {
      // 增长\t为了避免让表格显示科学计数法或者其余格式
      str += `<td>${this.showList[i][item] + '\t'}</td>`
    }
    str += '</tr>'
  }
  let worksheet = 'Sheet1'
  let uri = 'data:application/vnd.ms-excel;base64,'
  // 下载的表格模板数据
  let template = `<html xmlns:o="urn:schemas-microsoft-com:office:office" 
  xmlns:x="urn:schemas-microsoft-com:office:excel" 
  xmlns="http://www.w3.org/TR/REC-html40">
  <head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet>
    <x:Name>${worksheet}</x:Name>
    <x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>
    </x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]-->
    </head><body><table>${str}</table></body></html>`
  // 下载模板
  window.location.href = uri + this.base64(template)
},//showList是table数据

后端POI导出excel后端

public static ResponseEntity<byte[]> export(List<Position> pos) throws IOException {
        //建立一个 excel 文档
        HSSFWorkbook workbook = new HSSFWorkbook();
        //建立 excel 属性配置
        workbook.createInformationProperties();
        //获取而且配置文档属性
        DocumentSummaryInformation information = workbook.getDocumentSummaryInformation();

        information.setCategory("职位表");
        information.setManager("管理员");
        information.setCompany("liy");

        //建立表单
        HSSFSheet sheet = workbook.createSheet();

        HSSFRow row = sheet.createRow(0);
        HSSFCell c0 = row.createCell(0);
        HSSFCell c1 = row.createCell(1);
        HSSFCell c2 = row.createCell(2);
        HSSFCell c3 = row.createCell(3);


       c0.setCellValue("编号");
       c1.setCellValue("职位名称");
       c2.setCellValue("建立日期");
       c3.setCellValue("是否可用");

        HSSFCellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));

        for (int i = 0; i < pos.size(); i++) {
            Position position = pos.get(i);
            HSSFRow r = sheet.createRow(i + 1);
            HSSFCell cl0 = r.createCell(0);
            HSSFCell cl1 = r.createCell(1);
            HSSFCell cl2 = r.createCell(2);
            HSSFCell cl3 = r.createCell(3);

            cl0.setCellValue(position.getId());
            cl1.setCellValue(position.getName());
            cl2.setCellValue(position.getCreatedate());
            cl2.setCellStyle(cellStyle);
            cl3.setCellValue(position.getEnabled()?"是":"否");

        }

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        workbook.write(baos);

        HttpHeaders headers = new HttpHeaders();
        headers.setContentDispositionFormData("attachment",new String("职位表.xls".getBytes("UTF-8"),"iso-8859-1"));
        return new ResponseEntity<byte[]>(baos.toByteArray(),headers, HttpStatus.CREATED);

    }