SpringBoot-国际化设置(十)

一个网页实现中英文的切换就要用到我们的国际化.要实现国际化分为这么四步:

第一步:编写国际化配置文件，抽取页面需要显示的国际化消息

创建一个properties文件 login.properties 和一个login_zh_CN.properties注意这里的'_zh_CN不能改变!'

编写我们要国际化的值.

2.SpringBoot自动配置好了管理国际化资源文件的组件；

@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;
    }

springBoot帮我们配置好了国际化的配置,我们只需要在springBoot的配置文件中加入是在哪一个包下的-->spring.messages.basename=i18n.login

一般我们都会把国际化的配置放在i18n下.

3.去页面获取国际化的值

这里我们要注意在文件的配置中设置把file现转成ASCALL码然后去识别读取不了会出现乱码的问题

然后在我们需要获取国际化的页面获取国际化的值

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <meta name="description" content="">
        <meta name="author" content="">
        <title>Signin Template for Bootstrap</title>
        <!-- Bootstrap core CSS -->
        <link href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.3.1/css/bootstrap.css}" rel="stylesheet">
        <!-- Custom styles for this template -->
        <link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet">
    </head>

    <body class="text-center">
        <form class="form-signin" action="dashboard.html">
            <img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" src="asserts/img/bootstrap-solid.svg" alt="" width="72" height="72">
            <h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign in</h1>
            <label class="sr-only" th:text="#{login.username}">Username</label>
            <input type="text" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus="">
            <label class="sr-only" th:text="#{login.password}">Password</label>
            <input type="password" class="form-control" placeholder="Password" th:placeholder="#{login.password}" required="">
            <div class="checkbox mb-3">
                <label>
          <input type="checkbox"  value="remember-me"/> [[#{login.remember}]]
        </label>
            </div>
            <button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}">Sign in</button>
            <p class="mt-5 mb-3 text-muted">© 2017-2018</p>
            <a class="btn btn-sm" th:href="@{/login.html(l='zh_CN')}">中文</a>
            <a class="btn btn-sm" th:href="@{/login.html(l='en_US')}">English</a>
        </form>

    </body>

</html>

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

4.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 request) {
        String l = request.getParameter("l");
//        获取默认的区域信息
        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 request, HttpServletResponse response, Locale locale) {

    }
}

注意把我们的这个配置组件注册到spring的容器中来

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

点击切换就可也切换中,英文了.