Java下載檔案

標籤：protected   頭資訊   attach   utf-8   class   tcl   new   prot   png   

 下面的代碼簡單的實現了java下載檔案的步驟，看代碼:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {                 //擷取檔案的類名        String Path=this.getClass().getResource("/").getPath()+"JAVA筆記.txt";        //對擷取的路徑進行解碼        Path=URLDecoder.decode(Path);         //擷取檔案名稱字和副檔名        String FileName=Path.substring(Path.lastIndexOf("/")+1,Path.length());         //設定輸出檔案名編碼        FileName=URLEncoder.encode(FileName, "UTF-8");        //設定頭資訊        response.setHeader("content-disposition", "attachment;filename="+FileName);        response.setContentType("application/octet-stream");        //擷取檔案流對象        FileInputStream file=new FileInputStream(Path);         //定義位元組數組，長度為檔案流的長度        byte[] buffers=new byte[file.available()];        //擷取輸出資料流對象        OutputStream writer=response.getOutputStream();        //把流輸出到位元組數組中去        file.read(buffers);        //寫到頁面        writer.write(buffers);        //關閉流        writer.close();        file.close();    }

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Java下載檔案