SpringBoot之国际化

超、凢脫俗 2022-05-19 06:19 335阅读 0赞

这里省去搭建项目步骤。

第一步：创建国际化文件  
![这里写图片描述][70]

login.btn=Sign in
    login.password=Password
    login.remember=Remember me
    login.tip=Please sign in
    login.username=Username

第二步：配置国际化文件位置  
`application.properties`

spring.messages.basename=i18n.login

第三步：自定义国际化解析器

public class MyLocaleResolver implements LocaleResolver { 
        @Override
        public Locale resolveLocale(HttpServletRequest httpServletRequest) {
            // 从参数中取l的值作为语言和国家代码
            String paramLanguage = httpServletRequest.getParameter("l");
    
            if(!StringUtils.isEmpty(paramLanguage)){
                String[] splits = paramLanguage.split("-");
                return new Locale(splits[0], splits[1]);
            }else{
                // 从请求头中取Accept-Language的首个语言和国家代码
                String acceptLanguage = httpServletRequest.getHeader("Accept-Language").split(",")[0];
                String[] splits = acceptLanguage.split("-");
                return new Locale(splits[0], splits[1]);
            }
            // 如果想使用当前系统的语言，则使用Locale.getDefault()
        }
    
        @Override
        public void setLocale(HttpServletRequest httpServletRequest, @Nullable HttpServletResponse httpServletResponse, @Nullable Locale locale) {
    
        }
    }

注意：在SpringBoot中，自动配置好了管理国际化资源文件的组件`MessageSourceAutoConfiguration`

@ConfigurationProperties(prefix = "spring.messages")
    public class MessageSourceAutoConfiguration { 
    
        /** * Comma-separated list of basenames (essentially a fully-qualified classpath * location), each following the ResourceBundle convention with relaxed support for * slash based locations. If it doesn't contain a package qualifier (such as * "org.mypackage"), it will be resolved from the classpath root. */
        private String basename = "messages";  
        //我们的配置文件可以直接放在类路径下叫messages.properties；
    
        @Bean
        public MessageSource messageSource() {
            ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
            if (StringUtils.hasText(this.basename)) {
                //设置国际化资源文件的基础名（去掉语言国家代码的）
                messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(
                        StringUtils.trimAllWhitespace(this.basename)));
            }
            if (this.encoding != null) {
                messageSource.setDefaultEncoding(this.encoding.name());
            }
            messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale);
            messageSource.setCacheSeconds(this.cacheSeconds);
            messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat);
            return messageSource;
        }

第四步：将自定义国际化解析器加入容器

@Configuration
    public class MyMvcConfigurer implements WebMvcConfigurer { 
        @Bean
        public LocaleResolver localeResolver(){
            return new MyLocaleResolver();
        }
    }

第五步：在页面中使用方式，我这里是使用了Tymeleaf语法，使用普通html语法也一样

<h1 th:text="#{login.tip}">Please sign in</h1>
    <a th:href="@{/login.html(l='zh-CN')}">中文</a>
    <a th:href="@{/login.html(l='en-US')}">English</a>

[70]: /images/20220519/03ce8f35637b408a8af96e9189becef0.png