我想在用户调用这个方法时下载excel文件。文件正在下载成功,但这是在项目的classPath中创建另一个excel文件。任何人都可以帮助我避免这个classPath文件的创建。 在此先感谢。使用apache poi下载excel
@Override
public void downloadExcel(HttpServletRequest request,HttpServletResponse response) throws IOException {
File file = new File("Segmentdetail.xlsx");
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet spreadsheet = workbook.createSheet("SegmentLogs Info");
spreadsheet.setDefaultColumnWidth(20);
.....Here is the logic for generating sheet which is quite big so iam skipping it.
}
FileOutputStream out = new FileOutputStream(file);
workbook.write(out);
downloadFile(file,response);
out.close();
workbook.close();
}
private void downloadFile(File file, HttpServletResponse response){
try {
response.setContentType("application/vnd.ms-excel");
response.addHeader("content-disposition", "attachment; filename=Segmentdetail.xlsx");
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "no-store");
response.addHeader("Cache-Control", "max-age=0");
FileInputStream fin = null;
try {
fin = new FileInputStream(file);
} catch (final FileNotFoundException e) {
e.printStackTrace();
}
final int size = 1024;
try {
response.setContentLength(fin.available());
final byte[] buffer = new byte[size];
ServletOutputStream outputStream = null;
outputStream = response.getOutputStream();
int length = 0;
while ((length = fin.read(buffer)) != -1) {
outputStream.write(buffer, 0, length);
}
fin.close();
outputStream.flush();
outputStream.close();
} catch (final IOException e) {
e.printStackTrace();
}
}catch (final Exception ex){
ex.printStackTrace();
}
}
对不起,我试过了上面的一个,但文件没有找到异常结束。顺便说一句,我使用的是Ubuntu。 – lakshmi
然后指定路径如下/ home/usr/Filename并给出相同的路径,而你正在下载文件名= –
不,它不工作相同的异常。无论如何要保持excel表单在会话中并从那里下载? – lakshmi