先看测试效果：   

1. 设置中文

2.设置英文 

文件结构 

1.中文和英文的错误消息配置

package com.ldj.mybatisflex.common;import lombok.Getter;/*** User: ldj* Date: 2025/1/12* Time: 17:50* Description: 异常消息枚举*/
@Getter
public enum ExceptionEnum {//# code命名规则：模块编码 + 唯一序号 11表示用户管理模块LOGIN_EXCEPTION(1101),OTHER_EXCEPTION(1102);private Integer code;ExceptionEnum(Integer code) {this.code = code;}
}

2.统一响应类 

package com.ldj.mybatisflex.common;import lombok.Getter;
import lombok.Setter;
import org.springframework.context.i18n.LocaleContextHolder;import java.util.ResourceBundle;/*** User: ldj* Date: 2025/1/12* Time: 18:08* Description: 统一响应类*/
@Getter
@Setter
public class Response<T> {private static final String basePath = "i18n/message";private static final Integer successCode = 200;private static final String success = "成功！";private static final Integer failCode = 500;private static final String fail = "失败！";private Integer code;private String message;private T data;public static <T>Response<T> success(T data) {Response<T> response = new Response<>();response.setCode(200);response.setMessage(success);response.setData(data);return response;}public static <T>Response<T> fail() {return fail(failCode, fail);}//关键代码是读取国际化的配置文件，作为错误提示消息public static <T>Response<T> fail(ExceptionEnum exceptionEnum, T date) {Response<T> response = new Response<>();response.setCode(exceptionEnum.getCode());ResourceBundle bundle = ResourceBundle.getBundle(basePath, LocaleContextHolder.getLocale());String message = bundle.getString(exceptionEnum.getCode().toString());response.setMessage(message);response.setData(date);return response;}public static <T>Response<T> fail(Integer code, String message) {Response<T> response = new Response<>();response.setCode(code);response.setMessage(message);response.setData(null);return response;}
}

 3.登录拦截器

package com.ldj.mybatisflex.interceptor;import org.springframework.context.i18n.LocaleContext;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.context.i18n.SimpleLocaleContext;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;/*** User: ldj* Date: 2025/1/12* Time: 21:05* Description: 登录拦截器*/
@Order(1)
@Component
public class LoginUserInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//需要前端传过来的，这里一直是nullString language = request.getHeader("language");//假设前端传"en_US"//language = "en_US";//默认是zh_CNif (language == null || "".equals(language) || "zh_CN".equalsIgnoreCase(language)) {LocaleContext localeContext = new SimpleLocaleContext(Locale.SIMPLIFIED_CHINESE);LocaleContextHolder.setLocaleContext(localeContext);}else {LocaleContext localeContext = new SimpleLocaleContext(Locale.US);LocaleContextHolder.setLocaleContext(localeContext);}System.out.println("配置语言：" + LocaleContextHolder.getLocale());return true;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {//请求结束后记得清理 ThreadLocal里面的值，好让垃圾回收器回收LocaleContextHolder.resetLocaleContext();}
}

 4.配置webmvc 应用登录拦截器

package com.ldj.mybatisflex.config;import com.ldj.mybatisflex.interceptor.LoginUserInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/*** User: ldj* Date: 2025/1/12* Time: 21:00* Description: No Description*/
@Configuration
public class WebConfig implements WebMvcConfigurer {@Autowiredprivate LoginUserInterceptor loginUserInterceptor;@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(loginUserInterceptor);}
}

5.测试

package com.ldj.mybatisflex.controller;import com.ldj.mybatisflex.common.ExceptionEnum;
import com.ldj.mybatisflex.common.Response;
import com.ldj.mybatisflex.model.dao.UerInfoDAO;
import com.ldj.mybatisflex.model.dto.UserLoginReqDTO;
import org.springframework.web.bind.annotation.*;import javax.validation.Valid;/*** User: ldj* Date: 2024/11/17* Time: 16:55* Description: No Description*/
@RestController
@RequestMapping("/userInfo")
@CrossOrigin(maxAge = 3600)
public class UserInfoController {@PostMapping(value = "/login")public Response<UerInfoDAO> login(@RequestBody @Valid UserLoginReqDTO userLoginReqDTO){return Response.fail(ExceptionEnum.LOGIN_EXCEPTION, null);}
}

总结，这有个问题，每次读取配置文件都要操作io流，性能比直接定义在枚举差，3个字段，一个code ，1个cnMsg  ，1个enMsg，再写个方法判断是否中，英获取消息。

但是如果是法语，就失去灵活性，要改代码