java 實現對指定目錄的檔案進行下載

標籤：設定   type   建立   線路圖   ica   span   http   div   tty   

@RequestMapping("/exportDocument")    @ResponseBody    public void exportDocument(HttpServletRequest request,HttpServletResponse response) throws IOException {            XWPFDocument xdoc = null;        FileInputStream is = null;        OutputStream out=null;         try {            String wordName="數聚空港2.0使用手冊.docx";            wordName = new String(wordName.getBytes(), "iso8859-1");           // File file = new File("/root/usersGuide.docx");             response.setContentType("APPLICATION/OCTET-STREAM");            response.setHeader("Content-Disposition", "attachment; filename="                    + wordName);            is = new FileInputStream("/root/usersGuide.docx");            out=response.getOutputStream();//獲得一個output對象            xdoc = new XWPFDocument(is);            } catch (IOException e) {                e.printStackTrace();            }finally{                try {                    xdoc.write(out);//Write out this document to an Outputstream.                    is.close();                    out.close();                } catch (IOException e) {                    e.printStackTrace();                }            }                 /*上述是都word文檔的下載*/

                /*下面是對各種類型的檔案下載*/                         /*//2.擷取要下載的檔案名稱                String fileName = "test.png";                 //3.設定content-disposition回應標頭控制瀏覽器以下載的形式開啟檔案                 response.setHeader("content-disposition", "attachment;filename="+fileName);                //4.擷取要下載的檔案輸入資料流                InputStream in=null;                OutputStream out=null;                try {//擷取要下載的檔案的絕對路徑                    in=new FileInputStream("/root/運營線路圖0.3.5版.png");                    int len = 0;                     //5.建立資料緩衝區                     byte[] buffer = new byte[1024];                     //6.通過response對象擷取OutputStream流                     out = response.getOutputStream();                     //7.將FileInputStream流寫入到buffer緩衝區                     while ((len = in.read(buffer)) > 0) {//in.read(byte[] b)最多讀入b.length個位元組 在碰到流的結尾時 返回-1                     //8.使用OutputStream將緩衝區的資料輸出到用戶端瀏覽器                         out.write(buffer,0,len);                     }                } catch (FileNotFoundException e) {                    e.printStackTrace();                }finally{                     in.close();                     out.close();                }*/                     }          

 

java 實現對指定目錄的檔案進行下載