将数据导出为Excel表格

一、前台添加按钮向后台发送请求

<div class="select-btn" style="padding-left: 15px"> <input type="button" onclick="exportExcel()" value="导出"/> </div> // 导出 <script type="text/javascript"> function exportExcel() { location.href = "${path}/venue/exportVenueSubscribeExcel.do?"+$("#venueIndexForm").serialize(); } </script>

二、后台接受请求

@RequestMapping("/exportVenueSubscribeExcel") public void exportVenueByMessageExcel(HttpServletRequest request, HttpServletResponse response) { try { String venueName = request.getParameter("venueName"); String startTime = request.getParameter("startTime"); String endTime = request.getParameter("endTime"); response.setContentType("application/vnd.ms-excel;charset=utf-8"); response.setCharacterEncoding("UTF-8"); response.setHeader("Content-Disposition", "attachment;filename=" + "subscribeList.xls"); ServletOutputStream out = response.getOutputStream(); List<CmsVenueSubscrib> subscribList = cmsVenueService.queryVenueSubscribeAll(null,venueName,startTime,endTime); String[] header = new String[]{"场馆名称", "场馆类型", "预约人姓名", "预定时间", "身份证号","手机号"}; String[] zd = new String[]{"venueName", "extTagName", "subscribeName", "subscribeTime", "subscribeIdCard","subscribePhone"}; Map map = new HashMap<>(); for (int i = 0; i < zd.length; i++) { map.put(zd[i], i); } exportExcel.exportVenueSubscribeExcel("场馆预约列表", map, header, subscribList, out, "yyyy-MM-dd HH:mm:ss"); } catch (IOException e) { e.printStackTrace(); } }

三、编写工具类

public String exportVenueSubscribeExcel(String title, Map map, String[] headers , Collection<T> dataSet, ServletOutputStream out, String pattern) { // 声明一个工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); // 生成一个表格 HSSFSheet sheet = workbook.createSheet(title); // 设置表格默认列宽度为15个字节 sheet.setDefaultColumnWidth((short) 15); // 生成一个样式 HSSFCellStyle style = workbook.createCellStyle(); // 设置这些样式 style.setFillForegroundColor(HSSFColor.SKY_BLUE.index); style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); style.setBorderBottom(HSSFCellStyle.BORDER_THIN); style.setBorderLeft(HSSFCellStyle.BORDER_THIN); style.setBorderRight(HSSFCellStyle.BORDER_THIN); style.setBorderTop(HSSFCellStyle.BORDER_THIN); style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 生成一个字体 HSSFFont font = workbook.createFont(); font.setColor(HSSFColor.VIOLET.index); font.setFontHeightInPoints((short) 12); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 把字体应用到当前的样式 style.setFont(font); // 生成并设置另一个样式 HSSFCellStyle style2 = workbook.createCellStyle(); style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index); style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); style2.setBorderBottom(HSSFCellStyle.BORDER_THIN); style2.setBorderLeft(HSSFCellStyle.BORDER_THIN); style2.setBorderRight(HSSFCellStyle.BORDER_THIN); style2.setBorderTop(HSSFCellStyle.BORDER_THIN); style2.setAlignment(HSSFCellStyle.ALIGN_CENTER); style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 生成另一个字体 HSSFFont font2 = workbook.createFont(); font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); // 把字体应用到当前的样式 style2.setFont(font2); // 声明一个画图的顶级管理器 HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); // 定义注释的大小和位置,详见文档 HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5)); // 设置注释内容 comment.setString(new HSSFRichTextString("")); // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容. comment.setAuthor("why"); // 产生表格标题行 HSSFRow row = sheet.createRow(0); for (short i = 0; i < headers.length; i++) { HSSFCell cell = row.createCell(i); cell.setCellStyle(style); HSSFRichTextString text = new HSSFRichTextString(headers[i]); cell.setCellValue(text); } // 遍历集合数据，产生数据行 Iterator<T> it = dataSet.iterator(); int index = 0; while (it.hasNext()) { index++; row = sheet.createRow(index); T t = (T) it.next(); // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值 Field[] fields = t.getClass().getDeclaredFields(); for (short i = 0; i < fields.length; i++) { Field field = fields[i]; String fieldName = field.getName(); //判断是否需要生成该字段 if (map.containsKey(fieldName)) { try { HSSFCell cell = row.createCell(Integer.valueOf(map.get(fieldName).toString())); cell.setCellStyle(style2); String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1); Class tCls = t.getClass(); Method getMethod = tCls.getMethod(getMethodName, new Class[]{}); Object value = getMethod.invoke(t, new Object[]{}); // 判断值的类型后进行强制类型转换 String textValue = null; if (value instanceof Boolean) { boolean bValue = (Boolean) value; textValue = "Y"; if (!bValue) { textValue = "N"; } } else if (value instanceof Date) { Date date = (Date) value; SimpleDateFormat sdf = new SimpleDateFormat(pattern); textValue = sdf.format(date); } else if (value instanceof byte[]) { // 有图片时，设置行高为60px; row.setHeightInPoints(60); // 设置图片所在列宽度为80px,注意这里单位的一个换算 sheet.setColumnWidth(i, (short) (35.7 * 80)); // sheet.autoSizeColumn(i); byte[] bsValue = (byte[]) value; HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index); anchor.setAnchorType(2); patriarch.createPicture(anchor, workbook.addPicture( bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG)); } else { // 其它数据类型都当作字符串简单处理 textValue = value.toString(); } // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成 if (textValue != null) { Pattern p = Pattern.compile("^//d+(//.//d+)?$"); Matcher matcher = p.matcher(textValue); if (matcher.matches()) { // 是数字当作double处理 cell.setCellValue(Double.parseDouble(textValue)); } else { HSSFRichTextString richString = new HSSFRichTextString( textValue); HSSFFont font3 = workbook.createFont(); font3.setColor(HSSFColor.BLUE.index); richString.applyFont(font3); cell.setCellValue(richString); } } } catch (Exception ex) { ex.printStackTrace(); } } } } try { workbook.write(out); out.flush(); out.close(); //return out.toByteArray(); return Constant.RESULT_STR_SUCCESS; } catch (IOException e) { e.printStackTrace(); return null; } finally { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } }