CustomLocaleResolver.java

package com.cc.accelerator.config;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;

import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;

import com.cc.accelerator.constant.AppConstants;

@Configuration
public class CustomLocaleResolver extends AcceptHeaderLocaleResolver implements WebMvcConfigurer {

	@Bean
	public MessageSource messageSource() {
		ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
		messageSource.setBasename("messages/messages");
		return messageSource;
	}

	@Override
	public Locale resolveLocale(HttpServletRequest request) {
		String headerLang = request.getHeader(AppConstants.ACCEPTED_LANGUAGE);
		return headerLang == null || headerLang.isEmpty() ? Locale.US : new Locale(headerLang);
	}

	@Bean
	public LocaleChangeInterceptor localeChangeInterceptor() {
		return new LocaleChangeInterceptor();
	}

	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		registry.addInterceptor(localeChangeInterceptor());
	}

	@Bean
	@Override
	public LocalValidatorFactoryBean getValidator() {
		LocalValidatorFactoryBean bean = new LocalValidatorFactoryBean();
		bean.setValidationMessageSource(messageSource());
		return bean;
	}

}