SpringBoot后端接口返回值国际化

如图创建properties文件，可以根据实际情况替换到messages，messages后的别改。messages.properties内容可以为空，但一定要有这个文件。建立两个properties后，Resource Bundle 'message’会自动创建。

application.properties

application.yml

import org.apache.commons.lang3.StringUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.LocaleResolver;
 
import javax.servlet.http.HttpServletRequest;
import java.util.Locale;

import javax.servlet.http.HttpServletResponse;

@Component
public class MyLocalResolver implements LocaleResolver {

    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        // 获取请求中的语言参数
        String language = request.getHeader("Accept-Language");
        // 获取默认的语言
        Locale locale = Locale.getDefault();

        // 如果请求的链接携带了国际化参数
        if (!StringUtils.isEmpty(language)) {
            // zh_CN
            String[] split = language.split("_");
            // 国家，地区
            locale = new Locale(split[0], split[1]);
        }
        return locale;
    }

    @Override
    public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {

    }

    //注入Bean 自定义的国际化组件就生效了
    @Bean
    public LocaleResolver localeResolver(){
        return new MyLocalResolver();
    }

}

import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;


public class MessageUtils {

    private MessageUtils() { throw new IllegalStateException("Utility class"); }

    private static final MessageSource messageSource = SpringUtil.getBean(MessageSource.class);

    public static String getLocale(String msg) {
        try {
            return messageSource.getMessage(msg, null, LocaleContextHolder.getLocale());
        } catch (Exception e) {
            return msg;
        }
    }

}

SpringUtil.java

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
 

@Component
public class SpringUtil implements ApplicationContextAware {
 
    private static ApplicationContext applicationContext;
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(SpringUtil.applicationContext == null) {
            SpringUtil.applicationContext = applicationContext;
        }
    }
 
    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
 
    //通过name获取 Bean.
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }
 
    //通过class获取Bean.
    public static  T getBean(Class clazz){
        return getApplicationContext().getBean(clazz);
    }
 
    //通过name,以及Clazz返回指定的Bean
    public static  T getBean(String name,Class clazz){
        return getApplicationContext().getBean(name, clazz);
    }
}

5、在i18n中的properties输入值

6、编写测试接口

@GetMapping("/test")
public Result testInfo() {
    return Result.fail(MessageUtils.getLocale("username.repeat"));
}

Result是我自己写的一个封装返回结果的一个类，不用管，可以改成一下

@GetMapping("/test")
public String testInfo() {
    return MessageUtils.getLocale("username.repeat");
}

7、使用Postman进行测试



参考文章：https://blog.csdn.net/qq_26517983/article/details/100664664
https://blog.csdn.net/u010559460/article/details/104888699
https://blog.csdn.net/weixin_36050283/article/details/113318921