1、Controller類：
@Controller
@RequestMapping("down")
public class down {
@RequestMapping(params = "downExcel")
public String download(HttpServletRequest request,HttpServletResponse response) throws IOException{
String columnNames[]={"ID","項目名","銷售人","負責人","所用技術","備註"};//列名
//生成一個Excel文件
// 創建excel工作簿
Workbook wb = new HSSFWorkbook();
// 創建第一個sheet（頁），並命名
Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
// 手動設置列寬。第一個參數表示要爲第幾列設；，第二個參數表示列的寬度，n爲列高的像素數。
for(int i=0;i<keys.length;i++){
sheet.setColumnWidth((short) i, (short) (35.7 * 150));
}
// 創建第一行
Row row = sheet.createRow((short) 0);
//設置列名
for(int i=0;i<columnNames.length;i++){
Cell cell = row.createCell(i);
cell.setCellValue(columnNames[i]);
}
//同理可以設置數據行
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
wb.write(os);
} catch (IOException e) {
e.printStackTrace();
}
byte[] content = os.toByteArray();
InputStream is = new ByteArrayInputStream(content);
// 設置response參數，可以打開下載頁面
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;
}
}前臺代碼：
<input type="button" value="導出數據" onclick="download()"/>
//js代碼
function download(){
var url="down.do?downExcel";
window.open(url);
}