Springboot 国际化通过Header中Accept-Language的值切换语言实战与AcceptHeaderLocaleResolver源码解析

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@Configuration
public class WebConfig implements WebMvcConfigurer {
 
    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor() {
        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
        localeChangeInterceptor.setParamName("lang");
        return localeChangeInterceptor;
    }
 
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(localeChangeInterceptor());
    }
}

这段代码定义了一个配置类WebConfig，实现了WebMvcConfigurer接口，并注册了一个LocaleChangeInterceptor拦截器，该拦截器会根据请求中名为lang的参数改变应用程序的语言环境。这是Spring Boot应用程序中常用的一种实现国际化的方法。