要求外语流畅,多线程会玩,我是真的费劲。
- public class DownFile {
- public HttpServletResponse download(String path,String name, HttpServletResponse response) {
- try {
- // path是指欲下载的文件的路径。
- File file = new File(path);
- // 取得文件名。
- String filename="";
- if(name!=null&&name.length()!=0){
- filename = name;
- }else{
- filename = file.getName();
- }
- // 取得文件的后缀名。
- String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();
- // 以流的形式下载文件。
- InputStream fis = new BufferedInputStream(new FileInputStream(path));
- byte[] buffer = new byte[fis.available()];
- fis.read(buffer);
- fis.close();
- // 清空response
- response.reset();
- // 设置response的Header
- response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes(),"iso-8859-1"));
- response.addHeader("Content-Length", "" + file.length());
- OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
- response.setContentType("application/octet-stream");
- toClient.write(buffer);
- toClient.flush();
- toClient.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- }
- return response;
- }
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- try {
- long sd = new Date().getTime();
- String filename = request.getRealPath("/") + "表名" + DateUtil.format(new Date(), "yyyyMMddhhmmss") + ".xls";
- FileOutputStream fout = new FileOutputStream(filename);
- wb.write(fout);
- fout.close();
- long ed = new Date().getTime();
- System.out.println("---write---" + (ed - sd) + "毫秒,共计" + (ed - sd) / 1000 + "秒");
- DownFile DownFile = new DownFile();
- DownFile.download(filename, "", ServletActionContext.getResponse());
- File file = new File(filename);
- file.delete();
- long aed = new Date().getTime();
- System.out.println("---表名---" + (aed - asd) + "毫秒,共计" + (aed - asd) / 1000 + "秒");
- } catch (Exception e) {
- e.printStackTrace();
- }
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