1、Controller类:
@Controller @RequestMapping("down") public class down { @RequestMapping(params = "downExcel") public String download(HttpServletRequest request,HttpServletResponse response) throws IOException{ String columnNames[]={"ID","项目名","销售人","负责人","所用技术","备注"};//列名 //生成一个Excel文件 // 创建excel工作簿 Workbook wb = new HSSFWorkbook(); // 创建第一个sheet(页),并命名 Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString()); // 手动设置列宽。第一个参数表示要为第几列设;,第二个参数表示列的宽度,n为列高的像素数。 for(int i=0;i<keys.length;i++){ sheet.setColumnWidth((short) i, (short) (35.7 * 150)); } // 创建第一行 Row row = sheet.createRow((short) 0); //设置列名 for(int i=0;i<columnNames.length;i++){ Cell cell = row.createCell(i); cell.setCellValue(columnNames[i]); } //同理可以设置数据行 ByteArrayOutputStream os = new ByteArrayOutputStream(); try { wb.write(os); } catch (IOException e) { e.printStackTrace(); } 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((fileName + ".xls").getBytes(), "iso-8859-1")); ServletOutputStream out = response.getOutputStream(); BufferedInputStream bis = null; BufferedOutputStream bos = null; try { bis = new BufferedInputStream(is); bos = new BufferedOutputStream(out); 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 (final IOException e) { throw e; } finally { if (bis != null) bis.close(); if (bos != null) bos.close(); } return null; } }前台代码:
<input type="button" value="导出数据" onclick="download()"/> //js代码 function download(){ var url="down.do?downExcel"; window.open(url); }