转载

Spring Webflux国际化

这篇技术文章中，我们将看到如何在Spring Webflux应用程序中使用不同语言以及 Thymeleaf 模板框架。

让我们使用这个命令创建一个新项目：

spring init --dependencies=webflux --build=gradle --language=java spring-webflux-internationalization

这是生成的build.gradle文件：

buildscript {
  ext {
    springBootVersion = '2.1.2.RELEASE'
  }
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
  }
}

apply plugin: 'java'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'com.jos.dem.spring.webflux.internationalization'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

repositories {
    mavenCentral()
}

dependencies {
  implementation('org.springframework.boot:spring-boot-starter-webflux')
  testImplementation('org.springframework.boot:spring-boot-starter-test')
  testImplementation('io.projectreactor:reactor-test')
}

然后将Thymeleaf依赖项添加到您的build.gradle文件中：

implementation('org.thymeleaf:thymeleaf-spring5:3.0.11.RELEASE')

Spring Boot有一个用于解析消息的策略接口，支持此类消息的国际化。

@Bean
public MessageSource messageSource() {
  ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
  messageSource.setBasenames("i18n/messages");
  messageSource.setDefaultEncoding("UTF-8");
  return messageSource;
}

现在是配置模板解析器，模板引擎和视图解析器的时候了，因为我们需要将Thymeleaf配置为html模板。

@Bean
public ITemplateResolver thymeleafTemplateResolver() {
  final SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
  resolver.setApplicationContext(this.context);
  resolver.setPrefix("classpath:templates/");
  resolver.setSuffix(".html");
  resolver.setTemplateMode(TemplateMode.HTML);
  resolver.setCacheable(false);
  resolver.setCheckExistence(false);
  return resolver;
}

@Bean
public ISpringWebFluxTemplateEngine thymeleafTemplateEngine() {
  SpringWebFluxTemplateEngine templateEngine = new SpringWebFluxTemplateEngine();
  templateEngine.setTemplateResolver(thymeleafTemplateResolver());
  return templateEngine;
}

@Bean
public ThymeleafReactiveViewResolver thymeleafReactiveViewResolver() {
  ThymeleafReactiveViewResolver viewResolver = new ThymeleafReactiveViewResolver();
  viewResolver.setTemplateEngine(thymeleafTemplateEngine());
  return viewResolver;
}

@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
  registry.viewResolver(thymeleafReactiveViewResolver());
}

这是完整的完整Web配置：

@Configuration
@EnableWebFlux
public class WebConfig implements ApplicationContextAware, WebFluxConfigurer {

  private ApplicationContext context;

  @Override
  public void setApplicationContext(ApplicationContext context) {
    this.context = context;
  }

  @Bean
  public MessageSource messageSource() {
    ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
    messageSource.setBasenames("i18n/messages");
    messageSource.setDefaultEncoding("UTF-8");
    return messageSource;
  }

  @Bean
  public ITemplateResolver thymeleafTemplateResolver() {
    final SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
    resolver.setApplicationContext(this.context);
    resolver.setPrefix("classpath:templates/");
    resolver.setSuffix(".html");
    resolver.setTemplateMode(TemplateMode.HTML);
    resolver.setCacheable(false);
    resolver.setCheckExistence(false);
    return resolver;
  }

  @Bean
  public ISpringWebFluxTemplateEngine thymeleafTemplateEngine() {
    SpringWebFluxTemplateEngine templateEngine = new SpringWebFluxTemplateEngine();
    templateEngine.setTemplateResolver(thymeleafTemplateResolver());
    return templateEngine;
  }

  @Bean
  public ThymeleafReactiveViewResolver thymeleafReactiveViewResolver() {
    ThymeleafReactiveViewResolver viewResolver = new ThymeleafReactiveViewResolver();
    viewResolver.setTemplateEngine(thymeleafTemplateEngine());
    return viewResolver;
  }

  @Override
  public void configureViewResolvers(ViewResolverRegistry registry) {
    registry.viewResolver(thymeleafReactiveViewResolver());
  }

}

如您所见SpringResourceTemplateResolver，负责设置我们的模板文件路径和扩展名。在这种情况下，将定义一个index.html带有hello world消息的网页。

<html>
  <head>
    <meta charset="utf-8">
    <title>Internationalization with Spring Webflux</title>
  </head>
  <body></body>
</html>

ResourceBundleMessageSource为每种支持的语言定义消息资源路径。在这种情况下，我们将定义messages.properties为英语。

user.hello=Hello from internationalization!

messages_es.properties为西班牙：

user.hello=¡Hola Internacionalización!

下一步是告诉Spring使用Locale解析器。所以我们需要添加一个扩展自DelegatingWebFluxConfiguration定义的配置类LocaleContextResolver。

@Configuration
public class LocaleSupportConfig extends DelegatingWebFluxConfiguration {

  @Override
  protected LocaleContextResolver createLocaleContextResolver() {
    return new LocaleResolver();
  }

}

这是我们的语言环境解析器：

public class LocaleResolver implements LocaleContextResolver {

  @Override
  public LocaleContext resolveLocaleContext(ServerWebExchange exchange) {
    String language = exchange.getRequest().getHeaders().getFirst("Accept-Language");

    Locale targetLocale = Locale.getDefault();
    if (language != null && !language.isEmpty()) {
      targetLocale = Locale.forLanguageTag(language);
    }
    return new SimpleLocaleContext(targetLocale);
  }

  @Override
  public void setLocaleContext(ServerWebExchange exchange, LocaleContext localeContext) {
    throw new UnsupportedOperationException("Not Supported");
  }

}

就是这样，我们在客户请求的标题中阅读语言支持，这样我们就可以向客户显示正确的消息，无论是使用英语还是西班牙语。最后，这是我们的控制器来呈现索引网页。

@Controller
public class InternationalizationController {

  @GetMapping("/")
  public String index() {
    return "index";
  }

}

要运行项目：

gradle bootRun

请到此处下载项目。

原文 https://www.jdon.com/51493

正文到此结束

所属分类：编程技术 Java

本文标签： HTML bean classpath tag 配置 build id App message web Reactor map final IO https CTO 下载 java 索引标题 dependencies cache ip IDE 文章 spring springboot cat 解析 plugin maven UI http Spring Boot tar
版权声明： 本文为互联网转载文章，出处已在文章中说明(部分除外)。如果侵权，请联系本站长删除，谢谢。
本文海报： 生成海报一生成海报二

其他链接

关于本站

本站定位：个人技术类博客

本站作用：写博客、记日志、闲聊扯淡鼓捣技术。

问题交流

Spring Webflux国际化

热门推荐

相关文章

说给你听

本文目录

随机标签

书籍教程

近期评论

网站信息

其他链接

关于本站

问题交流