How to redirect ftl in spring boot? - spring

Question

I have already created an e mail confirmation in spring boot it is working nicely, and also I created a link when a user click it should say "confirmed"but I did not figure it out how to do that?
E mail sender java class:
#Component
public class EmailSender {
#Autowired
JavaMailSender javaEmailSender;
public void sendEmail(String to, String subject, String text) throws MessagingException {
MimeMessage message = javaEmailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message,
MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,
StandardCharsets.UTF_8.name());
helper.setTo(to);
helper.setSubject(subject);
helper.setText(text, true);
helper.addInline("logo.jpg", new ClassPathResource("./images/logo.jpg"));
javaEmailSender.send(message);
}
}
E mail template Loader:
#Component
public class EmailTemplateLoader {
#Autowired
private Configuration freemakerConfiguration;
public String getEmailBody(String name, String confirmationLink) throws TemplateException {
try {
Template template = freemakerConfiguration.getTemplate("EmailConfirmation.ftl");
Map<String, Object> data = new HashMap<String, Object>();
data.put("name", name);
data.put("confirmationLink", confirmationLink);
return FreeMarkerTemplateUtils.processTemplateIntoString(template, data);
} catch (IOException e) {
e.printStackTrace();
} catch (TemplateException e) {
e.printStackTrace();
}
return "";
}
}
My signup Resource :
#Autowired
private SignupService signupService;
#Autowired
private HttpServletRequest httpServletRequest;
#RequestMapping(value = "user/signup", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
#Transactional(rollbackFor = Exception.class)
public ResponseEntity<?> signup(#RequestBody UserType user) throws SignUpException {
URL requestUrl = null;
try {
requestUrl = new URL(httpServletRequest.getRequestURL().toString());
} catch (MalformedURLException e) {
logger.debug("Malformed Request Url");
}
logger.debug(requestUrl.toString());
signupService.signUp(user, requestUrl.getHost());
return new ResponseEntity<>(HttpStatus.OK);
}
#RequestMapping(value = "user/confirmation", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
#Transactional(rollbackFor = Exception.class)
public ResponseEntity<?> confirmSignUp(#RequestParam("u") String loginName, #RequestParam("p") String token) {
try {
signupService.emailConfirmation(loginName, token);
return new ResponseEntity<>(HttpStatus.OK);
} catch (SignUpException e) {
return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
}
}
So, As I told I can send an email successfully, but I could not sort how I can write confirmation successfully