【SpringBoot学习之路】14.国际化

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SpringMVC方式

• 编写国际化配置文件；
• 使用ResourceBundleMessageSource管理国际化资源文件
• 在页面使用fmt:message取出国际化内容

Springboot方式

• 编写国际化配置文件，抽取页面需要显示的国际化消息

• SpringBoot自动配置好了管理国际化资源文件的组件

@Configuration
@ConditionalOnMissingBean(
    value = {MessageSource.class},
    search = SearchStrategy.CURRENT
)
@AutoConfigureOrder(-2147483648)
@Conditional({MessageSourceAutoConfiguration.ResourceBundleCondition.class})
@EnableConfigurationProperties
public class MessageSourceAutoConfiguration {
    private static final Resource[] NO_RESOURCES = new Resource[0];

    public MessageSourceAutoConfiguration() {
    }

    @Bean
    @ConfigurationProperties(
        prefix = "spring.messages"
    )
    public MessageSourceProperties messageSourceProperties() {
        return new MessageSourceProperties();
    }

    @Bean
    public MessageSource messageSource(MessageSourceProperties properties) {
        ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
        if (StringUtils.hasText(properties.getBasename())) {
            messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename())));
        }

        if (properties.getEncoding() != null) {
            messageSource.setDefaultEncoding(properties.getEncoding().name());
        }

        messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale());
        Duration cacheDuration = properties.getCacheDuration();
        if (cacheDuration != null) {
            messageSource.setCacheMillis(cacheDuration.toMillis());
        }

        messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat());
        messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage());
        return messageSource;
    }

• 编码设置

• 去页面获取国际化的值

	
		
		
		
		
		
		
		
		
		
	

	
		

			
			
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效果：根据浏览器语言设置的信息切换了国际化；

原理

国际化Locale（区域信息对象）；LocaleResolver（获取区域信息对象）；

    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(prefix = "spring.mvc", name = "locale")
    public LocaleResolver localeResolver() {
        if (this.mvcProperties
                .getLocaleResolver() == WebMvcProperties.LocaleResolver.FIXED) {
            return new FixedLocaleResolver(this.mvcProperties.getLocale());
        }
        AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
        localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
        return localeResolver;
    }
   // 默认的就是根据请求头带来的区域信息获取Locale进行国际化

• 点击链接切换国际化

/**
 * 可以在连接上携带区域信息
 */
public class MyLocaleResolver implements LocaleResolver {


    @Override
    public Locale resolveLocale(HttpServletRequest httpServletRequest) {
        String l = httpServletRequest.getParameter("l");
        Locale locale = Locale.getDefault();
        if(!StringUtils.isEmpty(l)){
            String[] split = l.split("_");
            locale = new Locale(split[0],split[1]);
        }
        return locale;
    }

    @Override
    public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {

    }
}

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