String savepath = ServletActionContext.getServletContext().getRealPath("/upload");System.out.println(savepath); try { File desc = new File(savepath,picFileName); //FileUtils.copyFile(pic, desc); 《--采用此種方法以下均可省略，較簡單 InputStream is = new FileInputStream(pic); OutputStream s = new FileOutputStream(desc); byte[] buf = new byte[1024]; int len; while((len=is.read(buf))!=-1){ os.write(buf); } is.close(); os.close(); } catch (Exception e) { e.printStackTrace(); }
易錯點：若寫成--》is.read(buf)<0 將無法讀取過來， 但是會在目標路徑生成一個零字節文件！