A small problem with downloading a local file

Previous background method for downloading files

/**      * Download Attachment     * /public     voidthrows  ioexception        { = Getpara ("fjxxno");         = LkglService.service.fjxxDown (fjxxno);         byte [] Fjnr = Fjxx.get ("Fjnr");                 New toolfileconsole (). Loadfileforbyte (GetResponse (),        //The class is appended to the end of the text                string.valueof (fjxx.get ("FJMC" )), "Application/x-msdownload", Fjnr);    }

The attachment here is from the file that detects the database.

Change now: Need to download a local file (imitate above)

Background code;

private static String Downloadpath = "/files/aq/hj/jshjmb/jsmb.xlsx"; ()

/*** Download Attachments*/     Public voidDownload ()throwsIOException {String Realpath=Super. Getrealpath (); String Downloadpath= Realpath +Downloadpath; File File=NewFile (Downloadpath);                  System.out.println (File.exists ()); FileInputStream FIS=Newfileinputstream (file); Bytearrayoutputstream Bos=NewBytearrayoutputstream (); byte[] B =New byte[1024]; The array cannot be placed directly into the last parameter, or the file will not open. intLen;  while(len = Fis.read (b))! =-1) {Bos.write (b,0, Len);        } fis.close ();        Bos.close (); byte[] buffer =Bos.tobytearray (); Newtoolfileconsole (). Loadfileforbyte (GetResponse (), string.valueof ("Family meeting Information template file. xlsx"), "Application/x-msdownload", buffer); //String.valueof ("Family Meeting Information template file. xlsx")Doesn't seem to be useful .

Rendernull (); }

Attention:

New Toolfileconsole (). Loadfileforbyte method The last parameter is a byte array

We take

Bytearrayoutputstream Bos read out the file.

Then byte[] buffer = bos.tobytearray ();  to a byte array format. Into the last parameter position.

A small problem with downloading a local file