SpringBoot+vue.js如何经过post方式实现导出excel

之前咱们经常使用get方式导出excel，比较简单，可是对于请求参数有长度限制，要么控制参数长度，要么经过缓存的方式获取参数，仍是有点麻烦。前端

今天讲的是经过post方式导出excelios

先看前端代码spring

responseType: "blob"这个很关键

async exportData() { axios({ method: "post", url: "/excel", data:this.query.data, responseType: "blob" }) .then(res => { // console.log(decodeURI(res.headers['filename'])); const link = document.createElement("a"); let blob = new Blob([res.data], { type: "application/vnd.ms-excel" }); link.style.display = "none"; link.href = URL.createObjectURL(blob); link.setAttribute("download", decodeURI(res.headers['filename'])); document.body.appendChild(link); link.click(); document.body.removeChild(link); }) .catch(error => { this.$Notice.error({ title: "错误", desc: "系统数据错误" }); console.log(error); }); },

后台springboot经过poi导出excelapache

Maven引入依赖axios

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>RELEASE</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>RELEASE</version>
</dependency>

Controller层接受参数并处理数据，按理说不该该在这里处理数据，为了直观先这样了

@PostMapping(value = "excel") @ResponseBody public void excel() throws Exception { HttpServletRequest request = (HttpServletRequest) servletRequestAttributes.getRequest(); HttpServletResponse response = servletRequestAttributes.getResponse(); StringBuffer jb = new StringBuffer(); String line = null; BufferedReader reader = request.getReader(); while ((line = reader.readLine()) != null) jb.append(line); params = JSON.parseObject(jb.toString(), PersonRequest.class); //.....省略表头和数据处理
SimpleDateFormat fdate = new SimpleDateFormat("yyyyMMddHHmmss"); String fileName = title + fdate.format(new Date()) + ".xlsx"; ExcelUtil.exportExcel(response, fileName, data); }

ExcelUtil工具类

/** * 导出excel * @param response response * @param fileName 文件名 * @param data 数据 * @throws Exception */
    public static void exportExcel(HttpServletResponse response, String fileName, ExcelData data) throws Exception { // 告诉浏览器用什么软件能够打开此文件
        response.setHeader("content-Type", "application/vnd.ms-excel"); // 下载文件的默认名称
        response.setHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(fileName, "utf-8")); response.setHeader("FileName", URLEncoder.encode(fileName, "utf-8")); response.setHeader("Access-Control-Expose-Headers", "FileName"); exportExcel(data, response.getOutputStream()); } public static void exportExcel(ExcelData data, OutputStream out) throws Exception { XSSFWorkbook wb = new XSSFWorkbook(); try { String sheetName = data.getName(); if (null == sheetName) { sheetName = "Sheet1"; } XSSFSheet sheet = wb.createSheet(sheetName); writeExcel(wb, sheet, data); wb.write(out); } catch(Exception e){ e.printStackTrace(); }finally{ //此处须要关闭 wb 变量
 out.close(); } } private static void writeExcel(XSSFWorkbook wb, Sheet sheet, ExcelData data) { int rowIndex = 0; rowIndex = writeTitlesToExcel(wb, sheet, data.getTitles()); writeRowsToExcel(wb, sheet, data.getRows(), rowIndex); autoSizeColumns(sheet, data.getTitles().size() + 1); } private static int writeTitlesToExcel(XSSFWorkbook wb, Sheet sheet, List<String> titles) { int rowIndex = 0; int colIndex = 0; Font titleFont = wb.createFont(); titleFont.setFontName("simsun"); //titleFont.setBoldweight(Short.MAX_VALUE); // titleFont.setFontHeightInPoints((short) 14);
 titleFont.setColor(IndexedColors.BLACK.index); XSSFCellStyle titleStyle = wb.createCellStyle(); titleStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); titleStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER); titleStyle.setFillForegroundColor(new XSSFColor(new Color(182, 184, 192))); titleStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND); titleStyle.setFont(titleFont); setBorder(titleStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0))); Row titleRow = sheet.createRow(rowIndex); // titleRow.setHeightInPoints(25);
        colIndex = 0; for (String field : titles) { Cell cell = titleRow.createCell(colIndex); cell.setCellValue(field); cell.setCellStyle(titleStyle); colIndex++; } rowIndex++; return rowIndex; } private static int writeRowsToExcel(XSSFWorkbook wb, Sheet sheet, List<List<Object>> rows, int rowIndex) { int colIndex = 0; Font dataFont = wb.createFont(); dataFont.setFontName("simsun"); // dataFont.setFontHeightInPoints((short) 14);
 dataFont.setColor(IndexedColors.BLACK.index); XSSFCellStyle dataStyle = wb.createCellStyle(); dataStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); dataStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER); dataStyle.setFont(dataFont); setBorder(dataStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0))); SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); for (List<Object> rowData : rows) { Row dataRow = sheet.createRow(rowIndex); // dataRow.setHeightInPoints(25);
            colIndex = 0; for (Object cellData : rowData) { Cell cell = dataRow.createCell(colIndex); if (cellData != null) { if(cellData instanceof Date) { cell.setCellValue(sdf.format(cellData)); } else { cell.setCellValue(cellData.toString()); } } else { cell.setCellValue(""); } cell.setCellStyle(dataStyle); colIndex++; } rowIndex++; } return rowIndex; } private static void autoSizeColumns(Sheet sheet, int columnNumber) { for (int i = 0; i < columnNumber; i++) { int orgWidth = sheet.getColumnWidth(i); sheet.autoSizeColumn(i, true); int newWidth = (int) (sheet.getColumnWidth(i) + 100); if (newWidth > orgWidth) { sheet.setColumnWidth(i, newWidth); } else { sheet.setColumnWidth(i, orgWidth); } } } private static void setBorder(XSSFCellStyle style, BorderStyle border, XSSFColor color) { style.setBorderTop(border); style.setBorderLeft(border); style.setBorderRight(border); style.setBorderBottom(border); style.setBorderColor(BorderSide.TOP, color); style.setBorderColor(BorderSide.LEFT, color); style.setBorderColor(BorderSide.RIGHT, color); style.setBorderColor(BorderSide.BOTTOM, color); }