FPSMS-backend/src/main/java/com/ffii/fpsms/config/DefaultChineseLocale.java

package com.ffii.fpsms.config;

import java.util.Locale;

import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver;

/**
 * The MVC config already creates {@code localeResolver}. A second bean with that
 * name is rejected. This sets the existing resolver's default to Chinese when
 * the request has no Accept-Language header.
 */
@Component
public class DefaultChineseLocale implements BeanPostProcessor {

  @Override
  public Object postProcessAfterInitialization(Object bean, String beanName) {
    if (bean instanceof AcceptHeaderLocaleResolver resolver && "localeResolver".equals(beanName)) {
      resolver.setDefaultLocale(Locale.CHINESE);
    }
    return bean;
  }
}