今天做一个java对excel表格的导出和下载的时候,从网络上搜寻了下载的模板,代码如下:
控制层:
@RequestMapping(value = "excelOut_identifier") public void excelOutIdentifier(HttpServletRequest request, HttpServletResponse response, Long id, ActivationCodeSearchForm searchForm, ExhibitorInfoVenueBranchRelEditForm editForm, HttpSession session) { try { //获取数据 List<ActivationCodeDto> list = organizerService.ActivationCodeById(id,searchForm).getRows(); //excel标题 String[] title = {"激活码","主办方","创建时间","失效时间"}; //excel文件名 String fileName = "激活码信息表"+System.currentTimeMillis()+".xls"; //sheet名 String sheetName = "激活码信息表"; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String [][] content = new String[list.size()][]; for (int i = 0; i < list.size(); i++) { content[i] = new String[list.size(); ActivationCodeDto obj = list.get(i); content[i][0] = obj.getActivationCode(); content[i][1] = obj.getExhibitorInfoName(); content[i][2] = sdf.format(obj.getCreateTime()); content[i][3] = sdf.format(obj.getDisabledTime()); } //创建HSSFWorkbook HSSFWorkbook wb = organizerService.excelOutIdentifier(sheetName, title, content, null); this.organizerService.setResponseHeader(response, fileName); OutputStream os = response.getOutputStream(); wb.write(os); os.flush(); os.close(); }catch(IOException e1) { e1.printStackTrace(); } }
service层:
public HSSFWorkbook excelOutIdentifier(String sheetName,String []title,String [][]values, HSSFWorkbook wb){ // 第一步,创建一个HSSFWorkbook,对应一个Excel文件 if(wb == null){ wb = new HSSFWorkbook(); } // 第二步,在workbook中添加一个sheet,对应Excel文件中的sheet HSSFSheet sheet = wb.createSheet(sheetName); // 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制 HSSFRow row = sheet.createRow(0); // 第四步,创建单元格,并设置值表头 设置表头居中 HSSFCellStyle style = wb.createCellStyle(); style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式 //声明列对象 HSSFCell cell = null; //创建标题 for(int i=0;i<title.length;i++){ cell = row.createCell(i); cell.setCellValue(title[i]); cell.setCellStyle(style); } //创建内容 for(int i=0;i<values.length;i++){ row = sheet.createRow(i + 1); for(int j=0;j<values[i].length;j++){ //将内容按顺序赋给对应的列对象 row.createCell(j).setCellValue(values[i][j]); } } return wb; } public void setResponseHeader(HttpServletResponse response, String fileName) { try { try { fileName = new String(fileName.getBytes(),"ISO8859-1"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } response.setContentType("application/octet-stream;charset=ISO8859-1"); response.setHeader("Content-Disposition", "attachment;filename="+ fileName); response.addHeader("Pargam", "no-cache"); response.addHeader("Cache-Control", "no-cache"); } catch (Exception ex) { ex.printStackTrace(); } }
前端:
<button id="js-export" type="button" class="btn btn-primary">导出Excel</button>
jsp:
$('#js-export').click(function(){ window.location.href="${ctxRoot}/admin/organizer/excelOut_identifier.do?id=${id}" });
注意事项:
一开始我的前端页面时这样写的,是写的一个ajax请求:
<a class="btn btn-success es-ajax"
href="${ctxRoot}/admin/organizer/excelOut_identifier.do?id=${id}">导出excel</a>
在后端程序都实现可以跑的通的情况下,也没有什么日志错误的打印,前端页面并没有弹出下载的页面,然后再网络上搜索了方法,测试了一遍,都是不行,最后再一篇文章中看到了一个答案,说下载的情况下,使用ajax请求时,是不会弹出下载的页面出来的,随即将其修改成window.location.href的请求方式了。果然就解决了这个问题