This is a simple way to respond with CSV output in Spring. I have used Spring REST here but this can be also done with Spring MVC etc
Resource layer:
@RequestMapping(value="/{id}", method= RequestMethod.GET, produces = "text/csv")
@ResponseBody
public ResponseEntity<String> getCsvDownload(final HttpServletResponse response, @NotNull @PathVariable("id") int id){
response.setHeader("Content-Disposition", "attachment; filename=filename.csv");
response.setContentType("text/csv");
String csvResponse = applicationService.getCsv(id);
return new ResponseEntity<>(csvResponse, HttpStatus.OK);
}
Service layer:
@Override
public String getCsv(inal int id) {
return StringUtils.join(applicationDao.getDetails(id), ",");
}
