1. 通过FileInputStream读取文件输入流
- public void export(String excelPath, String fileName) throws Exception{
-
- //将文件存到指定位置
- //读取目标文件流，转换调用下载
- File resultFile = new File(excelPath);
- FileInputStream resultFileFi = new FileInputStream(resultFile);
- long l = resultFile.length();
- int k = 0;
- byte abyte0[] = new byte[65000];
-
- // 调用下载
- response.setContentType("application/x-msdownload");
- response.setContentLength((int) l);
- response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
- while ((long) k < l) {
- int j;
- j = resultFileFi.read(abyte0, 0, 65000);
- k += j;
- response.getOutputStream().write(abyte0, 0, j);
- }
- resultFileFi.close();
-
- //转换成功后，删除临时文件
- resultFile.delete();
- }
2. 注意getServletContext().getMimeType(fileName)，读取文件类型
- public void export1(String excelPath, String fileName){
- if (request.getParameter("file") != null) {
- fileName = request.getParameter("file");
- }
- System.out.println(ServletActionContext.getServletContext().getMimeType(fileName));
- response.setContentType(ServletActionContext.getServletContext().getMimeType(fileName));
- response.setHeader("Content-disposition","attachment; filename="+fileName);
- BufferedInputStream bis = null;
- BufferedOutputStream bos = null;
- try {
- bis = new BufferedInputStream( new FileInputStream(excelPath) );
- bos = new BufferedOutputStream(response.getOutputStream());
- byte[] buff = new byte[2048];
- int bytesRead;
- while(-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
- bos.write(buff,0,bytesRead);
- }
- } catch(final IOException e) {
- System.out.println ( "出现IOException." + e );
- } finally {
- if (bis != null)
- try {
- bis.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- if (bos != null)
- try {
- bos.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- }
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