Redirect on Spring MVC Example

1. forward - same request
2. redirect - new request

-----redirect example------
public ModelAndView apply(Long productId, HttpServletRequest request, HttpServletResponse response) {
String baseUrl = "/base/products/" + productId;

Map<String, String[]> parameterMap = request.getParameterMap();
if (!CoupangCollectionUtils.isEmpty(parameterMap)) {
Map<String, Object> parameterMapTransformed = Maps
.transformValues(parameterMap, new Function<String[], Object>() {
@Override public Object apply(String[] input) {
return Joiners.COMMA.join(input);
}
});

baseUrl = UriUtil.addParamsToUri(baseUrl, parameterMapTransformed);
}

RedirectView redirectView = new RedirectView(baseUrl);
redirectView.setExposeModelAttributes(false);
return new ModelAndView(redirectView);
}