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Usando AJAX para llamar al controlador y descargar un archivo

Estoy tratando de descargar un archivo desde el lado del servidor. Necesito llamar a la función usando AJAX. He probado si la descarga funciona sin usar AJAX, solo probando la URL directamente en el navegador web, funciona. Pero cuando trato de usar AJAX, ejecuta la función pero la respuesta no funciona.

CONTROLADOR:

 @RequestMapping(value = "descargaUsuaris", method = RequestMethod.GET) public final void descargaUsuaris(HttpServletResponse response) throws IOException, ParseException { byte[] processedFile = getUsuaris(); JSONObject output; try { output = new JSONObject(new String(processedFile, StandardCharsets.UTF_8)); JSONArray docs = output.getJSONArray("data"); File file = new File("temp/" + "temp_csv.csv"); File file2 = new File("temp/" + "usuaris.csv"); jsonToCsv(docs, file, file2); file.delete(); ContentDisposition disposition = ContentDisposition.builder( "attachment" ) .filename( "taulaMatriculaEstudiant.csv", StandardCharsets.UTF_8 ) .build(); response.setContentType( "text/csv" ); response.setHeader( "Cache-Control", "no-cache" ); response.setHeader( "Expires", "0" ); response.setHeader( "Pragma", "no-cache" ); OutputStream out = response.getOutputStream(); IOUtils.copy( new FileInputStream( file2.getAbsolutePath() ), out ); // IOUtils from Apache Commons-IO out.flush(); file2.delete(); } catch (Exception e) { e.printStackTrace(); } }

JAVASCRIPT:

 function descargaUsuaris(data) { var url = "/9avaldoval/administracio/descargaUsuaris"; var form = $('#formAdmBlue'); $.ajax({ url: url, type: 'GET', data: form.serialize(), success: function() { } }); }
over 4 years ago · Santiago Trujillo
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