Spring Boot本地化问题 - Accept-Language标头 [英] Spring Boot Localization issue - Accept-Language header

问题描述

我们正在使用Spring Boot作为应用程序。在ApplicationConfig.java中我有以下代码

We are using Spring Boot for the application. In ApplicationConfig.java I have the below code

 @Bean
    public LocaleResolver localeResolver() {
        return new SmartLocaleResolver();
    }

且SmartLocaleResolver.java低于

and the SmartLocaleResolver.java is below

public class SmartLocaleResolver extends SessionLocaleResolver {

    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        final String acceptLanguage = request.getHeader("Accept-Language");
        if (acceptLanguage.contains(",")) {
            String[] aheader = acceptLanguage.split(",[ ]*");    
            for (String locale : aheader) {    
                if (ApplicationConstants.LOCALE.contains(locale)) {
                    locale.trim();
                    return Locale.forLanguageTag(locale);
                }
            }
        } else if (!acceptLanguage.contains(",") && !acceptLanguage.isEmpty()) {
            if (ApplicationConstants.LOCALE.contains(acceptLanguage)) {
                return Locale.forLanguageTag(acceptLanguage);
            }
        }
        return request.getLocale();
    }
}

我在下面的常量类中进行比较标题Accept-Language中的值。

and I have in my constants class the below to compare the value from header Accept-Language.

public static final List LOCALE = Collections
.unmodifiableList（Arrays.asList（en，es）） ;

public static final List LOCALE = Collections .unmodifiableList(Arrays.asList("en", "es"));

我知道在实际情况下标题会像
Accept-Language：fr，es; q = 0.8，en-us; q = 0.6但是出于测试目的，我将其传递如下。

I know in actual scenario the header will be like Accept-Language : fr,es;q=0.8,en-us;q=0.6 but for testing purpose i'm passing it as below.

接受语言：fr，es，en

Accept-language : fr,es,en

代码还没有完成，但我只是测试邮递员，看看代码是否选择es作为语言环境并给我本地化的结果。

The code is not complete yet, but i'm just testing from postman to see if the code picks up "es" as the locale and gives me the localized result.

我没有messages_fr.properties文件但我有messages_es.properties所以我希望如果应用程序从下面的代码中设置区域设置，它会选择Locale作为'es'并以西班牙语提供我想要的值。我需要在这里进行哪些更改才能使代码生效？

I don't have messages_fr.properties file but I have messages_es.properties so I expect if the application sets the locale from the below code, it would pick Locale as 'es' and give the values I want in Spanish. What changes I need to make here for the code to work?

推荐答案

解决方案是：
公共类SmartLocaleResolver扩展 AcceptHeaderLocaleResolver 而不是
公共类SmartLocaleResolver扩展SessionLocaleResolver

The solution is: public class SmartLocaleResolver extends AcceptHeaderLocaleResolver instead of public class SmartLocaleResolver extends SessionLocaleResolver

以下是更新后的代码：

    public class SmartLocaleResolver extends AcceptHeaderLocaleResolver {

         @Override
            public Locale resolveLocale(HttpServletRequest request) {
                    if (StringUtils.isBlank(request.getHeader("Accept-Language"))) {
                    return Locale.getDefault();
                    }
                    List<Locale.LanguageRange> list = Locale.LanguageRange.parse(request.getHeader("Accept-Language"));
                    Locale locale = Locale.lookup(list, ApplicationConstants.LOCALES);
                    return locale ;
            }
    }

在我的常量类中我有：

List<Locale> LOCALES = Arrays.asList(new Locale("en"),
                                         new Locale("es"),
                                         new Locale("fr"),
                                         new Locale("es", "MX"),
                                         new Locale("zh"),
                                         new Locale("ja"));

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