springboot支持国际化seo优化

springboot支持国际化

news/2024/9/29 23:36:43

Spring Boot支持本地化的消息，这样你的应用程序就可以满足不同语言偏好的用户。默认情况下，Spring Boot会在classpath的根部寻找 messages 资源包（resource bundle）的存在。

自动配置只有在资源包中存在默认的properties文件（默认为 messages.properties ）时才生效。如果资源包中只有特定语言的properties，那你需要添加默认的。没有没有找到任何base name和语言相匹配的文件，MessageSource 不会自动配置。

在application.properties加上如下配置

spring.messages.basename=messages,config.i18n.messages
spring.messages.fallback-to-system-locale=false

// Steps:// --Understand Locale(know language codes)// --Configure Locale resolver and interceptor in spring// -- Create languge files(messages_XX.properties)  messages.properties:default// -- Update Thymeleaf views for i18n  Print text:[[#{key}]]  Attribute:th:value="#{key}"// -- Switch between languages(Englich,Chinese..)   URL paramter:?lang=xx

1.获取语言对应的code

 @GetMapping("/")public String hello( HttpServletRequest request) {// 修改语言是在浏览器上修改，比如谷歌 设置  语言Locale currentLocal = request.getLocale();String countryCode = currentLocal.getCountry();String countryName = currentLocal.getDisplayCountry();String langCode = currentLocal.getLanguage();String langName = currentLocal.getDisplayLanguage();System.out.println(countryCode + ":" + countryName);System.out.println(langCode + ":" + langName);System.out.println("==========================");String[] languages = Locale.getISOLanguages();for (String language : languages) {Locale locale = new Locale(language);// de:德语 en:英语 zh:中文//      System.out.println(language+":"+locale.getDisplayLanguage());}return "hello";}

2.配置如下代码

package com.integration.scaffold.javai18n;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.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;import java.util.Locale;
import java.util.TimeZone;@Configuration
public class MultiLanguageConfig implements WebMvcConfigurer {@Beanpublic LocaleResolver localeResolver() {SessionLocaleResolver slr = new SessionLocaleResolver();slr.setDefaultLocale(Locale.US);// timezone to change datetime outputslr.setDefaultTimeZone(TimeZone.getTimeZone("UTC"));return slr;}@Beanpublic LocaleChangeInterceptor localeChangeInterceptor() {LocaleChangeInterceptor lci = new LocaleChangeInterceptor();lci.setParamName("lang");return lci;}@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(localeChangeInterceptor());}
}

3.创建messages_xx.properties文件如下示例代码

hello.title=New day, new weather
hello=Hello!
welcome=Welcome to my app
switch-en=Switch to English
switch-zh=Switch to Chinese

hello.title=新的一天新气象
hello=你好
welcome=欢迎来到APP
switch-en=切换到英语
switch-zh=切换到中文

4.写一个Thymeleaf,格式为：

text:[[#{key}]]  Attribute:th:value="#{key}"

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head><meta charset="UTF-8"><title th:text="#{welcome}"></title>
</head>
<body>
<div><h1>[[#{hello.title}]]</h1>
</div><span th:text="#{hello}"></span><br>
<span th:text="#{welcome}"></span><br>
<button type="button" th:text="#{switch-en}"onclick="window.location.href='http://localhost:8080/Scaffold/?lang=en'"></button>
<button type="button" th:text="#{switch-zh}"onclick="window.location.href='http://localhost:8080/Scaffold/?lang=zh'"></button></body>
</html>

在浏览器输入地址，既可以切换语言了