java提供文件下载的方法

    String root  =  getServletContext().getRealPath( " / " );    String path  =  request.getParameter( " path " );    String name  =  request.getParameter( " name " );    response.setContentType( " unknown " );    response.addHeader( " Content-Disposition " ,  " filename=\ ""  + name +  " \ "" );     try      {        java.io.OutputStream    os  = response.getOutputStream();        java.io.FileInputStream fis = new java.io.FileInputStream(root + path + name);        byte[] b = new byte[1024];        int    i = 0;        while ( (i = fis.read(b)) > 0 )         {            os.write(b, 0, i);        }        fis.close();        os.flush();        os.close();    }      catch  ( Exception e )     {    }

转载于:https://www.cnblogs.com/nanshouyong326/archive/2008/04/14/1153015.html

相关资源：Java实现HTTP文件下载