檔案下載

/**      * 檔案上傳      */ @RequestMapping("registerEmployee")
public String registerEmployee(String ename,String hiredate,MultipartFile photo,HttpServletRequest req) throws                                          IllegalStateException, IOException{
              //獲取檔名
String file_name=photo.getOriginalFilename();
//獲取檔案字尾名
String pre_file=FilenameUtils.getExtension(file_name);
//隨機生成名字
String base_name=UUID.randomUUID().toString();
file_name=base_name+"."+pre_file;
if(!photo.isEmpty()){
photo.transferTo(new File("d:\\pingbao\\"+file_name));
}
  } /**      * 生成下載檔案        * filename為要下載的檔名      */     public static void generateDownloadFile(String filename,HttpServletRequest request,HttpServletResponse response){       File file = new File(filename);        try {   InputStream ins = new FileInputStream(file);   BufferedInputStream bins = new BufferedInputStream(ins);    OutputStream outs = response.getOutputStream();    BufferedOutputStream bouts = new BufferedOutputStream(outs);   response.setContentType("application/x-download");    response.setHeader("Content-disposition","attachment;filename="+URLEncoder.encode(file.getName(), "UTF-8"));    int bytesRead = 0;   byte[] buffer = new byte[8192]; // 開始向網路傳輸檔案流    while ((bytesRead =bins.read(buffer, 0, 8192)) != -1) {      bouts.write(buffer, 0, bytesRead);    }   bouts.flush();    ins.close();    bins.close();   bouts.close(); }catch (IOException e) { e.printStackTrace(); }      } 多個檔案打包 public static String multipleFilesToZip(String[] filename,String path){ // 隨機生成名字 String base_name = UUID.randomUUID().toString(); String fileZip = base_name + ".zip"; // 拼接zip檔案 String filepath = path+"\\" + fileZip; File files[] = new File[filename.length]; for (int i = 0; i < filename.length; i++) { files[i] = new File(filename[i]); } // 建立壓縮檔案 try { BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filepath)); ZipOutputStream zos = new ZipOutputStream(bos); ZipEntry ze = null; for (int i = 0; i < files.length; i++) { BufferedInputStream bis = new BufferedInputStream(new FileInputStream(files[i])); ze = new ZipEntry(files[i].getName()); zos.putNextEntry(ze); int s = -1; while ((s = bis.read()) != -1) { zos.write(s); } bis.close(); } zos.flush(); zos.close(); } catch (IOException e) { e.printStackTrace(); } return filepath; } 檔案刪除（多檔案） /**      * 遞迴刪除目錄下的所有檔案及子目錄下所有檔案      * @param dir 將要刪除的檔案目錄      */     public static boolean deleteDir(File dir) {         if (dir.isDirectory()) {             String[] children = dir.list();             //遞迴刪除目錄中的子目錄下             for (int i=0; i<children.length; i++) {                 boolean success = deleteDir(new File(dir, children[i]));                 if (!success) {                     return false;                 }             }         }         // 目錄此時為空，可以刪除         return dir.delete();     } /**      * 生成下載檔案        * filename為要下載的檔名      */