public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String fileModelName = "";
        Boolean flag = Boolean.valueOf(request.getParameter("_eiExportFlag"));
        if (!flag) {
            return;
        }
        String file = request.getParameter("_eiExportFileName");
        String type = request.getParameter("_eiExportFiletype");//统一选择2007版本以后的Excel,不做分类
        String name = request.getParameter("_eiExportBlockname");
        EiInfo tag = EiInfo.parseJSONString(request.getParameter("_eiExportData"));
        EiBlock result = tag.getBlock(name);
        Map metas = result.getBlockMeta().getMetas();
        List<String> l_header = new ArrayList<>();
        Iterator iter = metas.keySet().iterator();
        while (iter.hasNext()) {
            l_header.add(String.valueOf(iter.next()));
        }
        List<Object> values = Arrays.asList(metas.values().toArray());

        if (values == null) {
            return;
        }
        List<HashMap> rows = result.getRows();
        XSSFWorkbook wb =new XSSFWorkbook();;
        try {
//            // 读取了模板内所有sheet内容
            wb.createSheet("name");
            wb.setSheetName(0,name);
            XSSFSheet sheetAt = wb.getSheetAt(0);
            XSSFSheet row1 = sheetAt;
            XSSFFont titleFont =wb.createFont();
//            titleFont.setBold(bold);//是否粗细
            titleFont.setFontName("宋体");//字体
            titleFont.setFontHeight(13);//字体大小
            XSSFCellStyle titleStyle = wb.createCellStyle();

            titleStyle.setFont(titleFont);
            // 竖向居中
            titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
            // 横向居中
            titleStyle.setAlignment(HorizontalAlignment.CENTER);
            // 边框
            titleStyle.setBorderBottom(BorderStyle.THIN);
            titleStyle.setBorderLeft(BorderStyle.THIN);
            titleStyle.setBorderRight(BorderStyle.THIN);
            titleStyle.setBorderTop(BorderStyle.THIN);
            Row r0 = row1.getRow(0);
            if (r0 == null) {
                r0 = row1.createRow(0);
            }
            XSSFCellStyle x1=titleStyle;//表头
            x1.setFillForegroundColor(new XSSFColor(new java.awt.Color(166, 166, 166)));
            for (int j = 0; j < values.size(); j++) {//excel的第一行赋值
                Cell c0 = r0.getCell(j);
                if (c0 == null) {
                    c0 = r0.createCell(j);
                }
                c0.setCellStyle(x1);
                c0.setCellValue(((EiColumn) values.get(j)).getDescName());
            }
//            XSSFCellStyle xssfCellStyle1 = Font2BlodStyle(wb, false, 12, false);
            XSSFCellStyle x2=titleStyle;//表内容
            x2.setFillForegroundColor(new XSSFColor(new java.awt.Color(255, 255, 255)));
            for (int i = 0; i < rows.size(); i++) {
                Row r1 = row1.getRow(i + 1);
                if (r1 == null) {
                    r1 = row1.createRow(i + 1);
                }
                HashMap<String, String> hashMap = rows.get(i);
                int cqw = 0;
                for (String s : l_header) {
                    Cell c0 = r1.getCell(cqw);
                    if (c0 == null) {
                        c0 = r1.createCell(cqw);
                    }
                    c0.setCellStyle(x2);
                    c0.setCellValue(hashMap.get(s));
                    cqw++;
                }
            }
            //自动调整列宽
            for (int i = 0; i < values.size(); i++) {
                sheetAt.autoSizeColumn(i);
                sheetAt.setColumnWidth(i,sheetAt.getColumnWidth(i));
            }
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            wb.write(os);
            byte[] content = os.toByteArray();
            InputStream is = new ByteArrayInputStream(content);

            // 设置response参数，可以打开下载页面
            response.reset();
            response.setContentType("application/vnd.ms-excel;charset=utf-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + new String((file + ".xlsx").getBytes(), "iso-8859-1"));
            ServletOutputStream sout = response.getOutputStream();
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
                bis = new BufferedInputStream(is);
                bos = new BufferedOutputStream(sout);
                byte[] buff = new byte[2048];
                int bytesRead;
                // Simple read/write loop.
                while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                    bos.write(buff, 0, bytesRead);
                }
            } catch (Exception e) {
                System.out.println(e);
            } finally {
                if (bis != null)
                    bis.close();
                if (bos != null)
                    bos.close();
            }

        } catch (Exception s) {
            System.out.println(s);
        }
    }

　　依赖

       <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>ooxml-schemas</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.9</version>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>