springboot集成i18n做国际化

增加配置类：

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
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;
/**
 * @创建人 yumifen
 * @创建时间 2020/5/9
 * @描述
 **/
@Configuration
public class LocaleConfig {

    /**
     * 多语言的资源文件路径,在application.properties中增加配置spring.messages.basename=classpath:i18n/message;classpath:i18n/log
     */
    @Value("${spring.messages.basename}")
    private String path;

    /**
     * 功能描述：  加载一下语言资源
     *
     * @param
     * @author wangcanfeng
     * @time 2019/3/4 22:03
     * @since v1.0
     **/
    @Bean("messageSource")
    @ConditionalOnMissingBean
    public ReloadableResourceBundleMessageSource messageSource() {
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        // 用分号隔开各个语言资源路径
        String[] paths=path.split(";");
        messageSource.setBasenames(paths);
        messageSource.setDefaultEncoding("UTF-8");
        messageSource.setUseCodeAsDefaultMessage(true);
        messageSource.setFallbackToSystemLocale(false);
        return messageSource;
    }

    /**
     * 默认解析器 其中locale表示默认语言
     */
    @Bean
    public LocaleResolver localeResolver() {
        SessionLocaleResolver localeResolver = new SessionLocaleResolver();
        localeResolver.setDefaultLocale(Locale.SIMPLIFIED_CHINESE);
        return localeResolver;
    }

    /**
     * 默认拦截器 其中lang表示切换语言的参数名
     */
    @Bean
    public WebMvcConfigurer localeInterceptor() {
        return new WebMvcConfigurer() {
            @Override
            public void addInterceptors(InterceptorRegistry registry) {
                LocaleChangeInterceptor localeInterceptor = new LocaleChangeInterceptor();
                localeInterceptor.setParamName("lang");
                registry.addInterceptor(localeInterceptor);
            }
        };
    }
}

创建可以便捷实用i18n的组件

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Component;

/**
 * @创建人 yumifen
 * @创建时间 2020/5/9
 * @描述
 **/
@Component
public class LocalContent {

    private static MessageSource messageSource;

    public LocalContent(@Qualifier("messageSource") MessageSource messageSource) {
        this.messageSource = messageSource;
    }

    /**
     * 获取单个国际化翻译值
     */
    public static String get(String msgKey) {
        try {
            return messageSource.getMessage(msgKey, null, LocaleContextHolder.getLocale());
        } catch (Exception e) {
            return msgKey;
        }
    }

}