springboot页面国际化

admin · 发表于 2022-3-3 19:38:29

引入依赖pom.xml
[mw_shl_code=java,true] <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-thymeleaf</artifactId>
      </dependency>

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导入网页资源，这里给大家推荐一个我自己在使用的页面资源，SB ADMIN-2

html页面放在templates目录下，这是thymeleaf默认的解析目录，其他的样式文件放在static目录下

接管spring Mvc,自定义url访问路径，可做可不做

建一个config目录，在这里建一个myWebMvcConfig
[mw_shl_code=java,true]import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class myWebMvcConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {

      registry.addViewController("/wq").setViewName("register");//localhost:8080/wq
      registry.addViewController("/").setViewName("register");//localhpst:8080/
      registry.addViewController("/register.html").setViewName("register");
      //localhost:8080/register.html
}
}
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路径可以设置多个，这样只要是这三个url,spring 都会访问register.html
还有一种方式也能实现
[mw_shl_code=java,true]import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class demoController {
@RequestMapping({"/","/wq"})
public String test(){
      return "register";
}
}
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国际化配置文件：en_US英文，zh_CN中文

点击左上角加号，便可以添加配置的属性，只要在右边填写相应的中英文即可

.
配置文件已经写好，如何在我们的页面中使用呢？thyme leaf的作用又来了
[mw_shl_code=applescript,true]  首先在你的网页添加这样的头部

  ```html
  <html lang="en" xmlns:th="http://www.thymeleaf.org">
  ```

  在所有的html属性前加**th:**就被thymeleaf接管了，根据thymeleaf 语法，获取国际化值使用**#{}**，本地值用**${}**,url用**@{}**

  ![image-20220228101634725](C:\Users\32944\AppData\Roaming\Typora\typora-user-images\image-20220228101634725.png)

  ![image-20220228101806743](C:\Users\32944\AppData\Roaming\Typora\typora-user-images\image-20220228101806743.png)

  ```html
<a  th:href="@{/register.html(l='zh_CN')}" >中文 </a>
  <a  th:href="@{/register.html(l='en_US')}">English </a>
  ```

  6. 页面和配置文件都准备好了，怎样实现跳转呢？

   在WebMvcAutoConfiguration.class中

   ```java
      @Bean
         @ConditionalOnMissingBean(
               name = {"localeResolver"}
         )
         public LocaleResolver localeResolver() {
               if (this.webProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.WebProperties.LocaleResolver.FIXED) {
                  return new FixedLocaleResolver(this.webProperties.getLocale());
               } else {
                  AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
                  localeResolver.setDefaultLocale(this.webProperties.getLocale());
                  return localeResolver;
               }
         }
   ```

   我们再找到AcceptHeaderLocaleResolver.class,发现它实现了LocaleResolver

   ```java
   public class AcceptHeaderLocaleResolver implements LocaleResolver {
      private final List<Locale> supportedLocales = new ArrayList(4);
      @Nullable
      private Locale defaultLocale;
   ```

   那我们就编写自己的LocaleResolver

   ```java
   public class myLocaleResolver implements LocaleResolver {
      @Override
      public Locale resolveLocale(HttpServletRequest request) {

         String mylocale=request.getParameter("l");
         Locale locale=Locale.getDefault();
         if(!StringUtils.isEmpty(mylocale)){
               String[] split=mylocale.split("_");
               locale=new Locale(split[0],split[1]);
         }
            System.out.println("debug====>"+mylocale);
         return locale;
      }

      @Override
      public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {

      }
   }

   ```

   然后在spring配置中注入myLocaleResolver

   ```java
   @Bean
   public LocaleResolver localeResolver(){
      return new myLocaleResolver();

   }
   ```

   **注意：方法名必须是localeResolver**,**因为源码中名字为localeResolver的bean**
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最后我们来测试一下

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springboot页面国际化

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