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Learn more about Teams @Bean public LocaleResolver localeResolver(){ CookieLocaleResolver localeResolver = new CookieLocaleResolver(); localeResolver.setDefaultLocale(new Locale("en", "US")); return localeResolver; @RequestMapping(value = "/{lang}", method = RequestMethod.GET) public String changeSessionLanguage(HttpServletRequest request, HttpServletResponse response, @PathVariable("lang") String lang) { LocaleResolver localeResolver = RequestContextUtils.getLocaleResolver(request); Locale locale = LocaleContextHolder.getLocale(); if ("zh".equals(lang)) { localeResolver.setLocale(request, response, new Locale("zh", "CN")); } else if ("jp".equals(lang)) { localeResolver.setLocale(request, response, new Locale("ja", "JP")); } else { localeResolver.setLocale(request, response, new Locale("en", "US")); return "redirect:/";

And it works good.

But in Spring security UserDetailsService source, I can't get locale as this:

Locale locale = LocaleContextHolder.getLocale();
It always show my browser language no matter I had changed the locale to what.
How can I get the locale correctly?
Thanks!
UPDATE
I changed code, move LocaleResolver to Configuration class and add RequestContextListener like bellow:
@Configuration
@WebListener
public class Config extends RequestContextListener{
    @Bean
    public RequestContextListener requestContextListener(){
    return new RequestContextListener();
    @Bean
    public LocaleResolver localeResolver(){
    CookieLocaleResolver localeResolver = new CookieLocaleResolver();
    localeResolver.setDefaultLocale(new Locale("en", "US"));
    return localeResolver;
But it also can't work.
                Move the bean definition to a @Configuration annotated classes instead of inside a @Controller. You would also need to register the RequestContextListener to have it take effect (not sure if either the RequestContextListener or the RequestContextFilter is already registered by Spring Boot).
– M. Deinum
                Oct 16, 2017 at 5:56
                For starters don't extend RequestContextListener and remove @WebListener, also you might want to add this to your class annotated with @SpringBootAPplication.
– M. Deinum
                Oct 16, 2017 at 8:32
                @M.Deinum Thanks your answer, but it also can't work. The locale is always same with browser no matter I changed it to what locale in my Controller. Maybe I must get the locale in other ways? instead of get it use LocaleContextHolder?
– fish
                Oct 17, 2017 at 7:53
        
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