实现了国际化

backend/src/main/java/com/qqchen/deploy/backend/api/UserApiController.java

@@ -1,7 +1,9 @@
 package com.qqchen.deploy.backend.api;
 
 import com.qqchen.deploy.backend.common.controller.BaseController;
-import com.qqchen.deploy.backend.common.dto.Response;
+import com.qqchen.deploy.backend.common.api.Response;
+import com.qqchen.deploy.backend.common.enums.ResponseCode;
+import com.qqchen.deploy.backend.common.utils.MessageUtils;
 import com.qqchen.deploy.backend.converter.UserConverter;
 import com.qqchen.deploy.backend.entity.User;
 import com.qqchen.deploy.backend.dto.query.UserQuery;
@@ -32,7 +34,7 @@ public class UserApiController extends BaseController<User, Long, UserQuery, Use
     public Response<UserResponse> register(@Validated @RequestBody UserRegisterRequest request) {
         // 基础的注册逻辑
         if (!request.getPassword().equals(request.getConfirmPassword())) {
-            return Response.error(Response.INVALID_PARAM_CODE, "两次密码不一致");
+            return Response.error(ResponseCode.USER_NOT_FOUND);
         }
 
         User user = converter.toEntity(request);

backend/src/main/java/com/qqchen/deploy/backend/common/api/Response.java

@@ -0,0 +1,53 @@
+package com.qqchen.deploy.backend.common.api;
+
+import com.qqchen.deploy.backend.common.enums.ResponseCode;
+import com.qqchen.deploy.backend.common.utils.MessageUtils;
+import lombok.Data;
+
+import java.io.Serializable;
+
+
+@Data
+public class Response<T> implements Serializable {
+
+    private boolean success;
+
+    private String message;
+
+    private T data;
+
+    private Integer code;
+
+    public static <T> Response<T> success() {
+        Response<T> response = new Response<>();
+        response.setSuccess(true);
+        response.setCode(ResponseCode.SUCCESS.getCode());
+        response.setMessage(MessageUtils.getMessage(ResponseCode.SUCCESS.getMessageKey()));
+        return response;
+    }
+
+    public static <T> Response<T> success(T data) {
+        Response<T> response = new Response<>();
+        response.setSuccess(true);
+        response.setCode(ResponseCode.SUCCESS.getCode());
+        response.setMessage(MessageUtils.getMessage(ResponseCode.SUCCESS.getMessageKey()));
+        response.setData(data);
+        return response;
+    }
+
+    public static <T> Response<T> error(ResponseCode responseCode) {
+        Response<T> response = new Response<>();
+        response.setSuccess(false);
+        response.setCode(responseCode.getCode());
+        response.setMessage(MessageUtils.getMessage(responseCode.getMessageKey()));
+        return response;
+    }
+
+    public static <T> Response<T> error(ResponseCode responseCode, Object... args) {
+        Response<T> response = new Response<>();
+        response.setSuccess(false);
+        response.setCode(responseCode.getCode());
+        response.setMessage(MessageUtils.getMessage(responseCode.getMessageKey(), args));
+        return response;
+    }
+}

backend/src/main/java/com/qqchen/deploy/backend/common/config/MessageConfig.java

@@ -0,0 +1,32 @@
+package com.qqchen.deploy.backend.common.config;
+
+import org.springframework.context.MessageSource;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.ResourceBundleMessageSource;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+
+@Configuration
+public class MessageConfig {
+
+    @Bean
+    public MessageSource messageSource() {
+        ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
+        messageSource.setBasenames("messages");
+        messageSource.setDefaultEncoding("UTF-8");
+        messageSource.setUseCodeAsDefaultMessage(true);
+        return messageSource;
+    }
+
+    @Bean
+    public LocaleResolver localeResolver() {
+        SessionLocaleResolver localeResolver = new SessionLocaleResolver();
+        localeResolver.setDefaultLocale(Locale.SIMPLIFIED_CHINESE);
+        return localeResolver;
+    }
+}

backend/src/main/java/com/qqchen/deploy/backend/common/config/WebConfig.java

@@ -2,7 +2,9 @@ package com.qqchen.deploy.backend.common.config;
 
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 
 @Configuration
 public class WebConfig implements WebMvcConfigurer {
@@ -15,4 +17,11 @@ public class WebConfig implements WebMvcConfigurer {
             .allowedHeaders("*")  // 允许所有header
             .maxAge(3600);  // 预检请求的有效期，单位为秒
     }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
+        localeChangeInterceptor.setParamName("lang");
+        registry.addInterceptor(localeChangeInterceptor);
+    }
 }

backend/src/main/java/com/qqchen/deploy/backend/common/controller/BaseController.java

@@ -4,7 +4,7 @@ import com.qqchen.deploy.backend.common.domain.Entity;
 import com.qqchen.deploy.backend.common.converter.BaseConverter;
 import com.qqchen.deploy.backend.common.query.BaseQuery;
 import com.qqchen.deploy.backend.common.dto.BaseRequest;
-import com.qqchen.deploy.backend.common.dto.Response;
+import com.qqchen.deploy.backend.common.api.Response;
 import com.qqchen.deploy.backend.common.service.BaseService;
 import jakarta.annotation.Resource;
 import org.springframework.data.domain.Page;

backend/src/main/java/com/qqchen/deploy/backend/common/dto/Response.java

@@ -1,45 +0,0 @@
-package com.qqchen.deploy.backend.common.dto;
-
-import lombok.Data;
-
-import java.io.Serializable;
-
-/**
- * 通用响应对象
- */
-@Data
-public class Response<T> implements Serializable {
-    private boolean success;
-    private String message;
-    private T data;
-    private Integer code;
-
-    public static final int SUCCESS_CODE = 200;
-    public static final int ERROR_CODE = 500;
-    public static final int INVALID_PARAM_CODE = 400;
-    public static final int UNAUTHORIZED_CODE = 401;
-
-    public static <T> Response<T> success() {
-        return success(null);
-    }
-
-    public static <T> Response<T> success(T data) {
-        Response<T> response = new Response<>();
-        response.setSuccess(true);
-        response.setCode(SUCCESS_CODE);
-        response.setData(data);
-        return response;
-    }
-
-    public static <T> Response<T> error(String message) {
-        return error(ERROR_CODE, message);
-    }
-
-    public static <T> Response<T> error(Integer code, String message) {
-        Response<T> response = new Response<>();
-        response.setSuccess(false);
-        response.setCode(code);
-        response.setMessage(message);
-        return response;
-    }
-}

backend/src/main/java/com/qqchen/deploy/backend/common/enums/ResponseCode.java

@@ -0,0 +1,28 @@
+package com.qqchen.deploy.backend.common.enums;
+
+import lombok.Getter;
+
+@Getter
+public enum ResponseCode {
+    SUCCESS(200, "response.success"),
+    ERROR(500, "response.error"),
+    INVALID_PARAM(400, "response.invalid.param"),
+    UNAUTHORIZED(401, "response.unauthorized"),
+    FORBIDDEN(403, "response.forbidden"),
+    NOT_FOUND(404, "response.not.found"),
+    CONFLICT(409, "response.conflict"),
+
+    // 业务错误码
+    USER_NOT_FOUND(1001, "user.not.found"),
+    USERNAME_EXISTS(1002, "user.username.exists"),
+    EMAIL_EXISTS(1003, "user.email.exists");
+
+    private final int code;
+
+    private final String messageKey;  // 国际化消息key
+
+    ResponseCode(int code, String messageKey) {
+        this.code = code;
+        this.messageKey = messageKey;
+    }
+}

backend/src/main/java/com/qqchen/deploy/backend/common/utils/EntityPathResolver.java

@@ -12,27 +12,37 @@ public class EntityPathResolver {
 
     public static Path<?> getPath(EntityPath<?> entityPath, String fieldName) {
         try {
-            // 首先尝试直接获取字段
+            // 1. 首先尝试直接获取字段
             try {
                 Field field = entityPath.getClass().getDeclaredField(fieldName);
                 field.setAccessible(true);
                 return (Path<?>) field.get(entityPath);
             } catch (NoSuchFieldException e) {
-                // 如果找不到，尝试从_super中获取
+                // 2. 尝试从_super中获取
                 Field superField = entityPath.getClass().getDeclaredField("_super");
                 superField.setAccessible(true);
                 Object superInstance = superField.get(entityPath);
 
                 if (superInstance != null) {
                     try {
+                        // 直接从_super中获取字段
                         Field field = superInstance.getClass().getDeclaredField(fieldName);
                         field.setAccessible(true);
                         return (Path<?>) field.get(superInstance);
                     } catch (NoSuchFieldException ex) {
-                        // 打印调试信息
+                        // 3. 尝试从_super.entity中获取
-                        log.debug("Field {} not found in _super, available fields:", fieldName);
+                        try {
-                        for (Field field : superInstance.getClass().getDeclaredFields()) {
+                            Field entityField = superInstance.getClass().getDeclaredField("entity");
-                            log.debug("Field name in _super: {}", field.getName());
+                            entityField.setAccessible(true);
+                            Object entityInstance = entityField.get(superInstance);
+
+                            if (entityInstance != null) {
+                                Field field = entityInstance.getClass().getDeclaredField(fieldName);
+                                field.setAccessible(true);
+                                return (Path<?>) field.get(entityInstance);
+                            }
+                        } catch (NoSuchFieldException | IllegalAccessException innerEx) {
+                            log.debug("Field {} not found in _super.entity", fieldName);
                         }
                     }
                 }

backend/src/main/java/com/qqchen/deploy/backend/common/utils/MessageUtils.java

@@ -0,0 +1,30 @@
+package com.qqchen.deploy.backend.common.utils;
+
+import org.springframework.context.MessageSource;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.stereotype.Component;
+
+@Component
+public class MessageUtils {
+    private static MessageSource messageSource;
+
+    public MessageUtils(MessageSource messageSource) {
+        MessageUtils.messageSource = messageSource;
+    }
+
+    public static String getMessage(String key) {
+        try {
+            return messageSource.getMessage(key, null, LocaleContextHolder.getLocale());
+        } catch (Exception e) {
+            return key;
+        }
+    }
+
+    public static String getMessage(String key, Object... args) {
+        try {
+            return messageSource.getMessage(key, args, LocaleContextHolder.getLocale());
+        } catch (Exception e) {
+            return key;
+        }
+    }
+}

backend/src/main/java/com/qqchen/deploy/backend/controller/UserController.java

@@ -1,7 +1,7 @@
 package com.qqchen.deploy.backend.controller;
 
 import com.qqchen.deploy.backend.api.UserApiController;
-import com.qqchen.deploy.backend.common.dto.Response;
+import com.qqchen.deploy.backend.common.api.Response;
 import com.qqchen.deploy.backend.converter.UserConverter;
 import com.qqchen.deploy.backend.service.UserService;
 import org.springframework.web.bind.annotation.GetMapping;

backend/src/main/resources/application.yml

@@ -20,8 +20,21 @@ spring:
           time_zone: Asia/Shanghai
     mvc:
       log-request-details: true  # \u6253\u5370\u8BF7\u6C42\u8BE6\u60C5
+    messages:
+      basename: messages
+      encoding: UTF-8
+      fallback-to-system-locale: false
+  messages:
+    basename: messages
+    encoding: UTF-8
+    fallback-to-system-locale: false
+    always-use-message-format: false
+    use-code-as-default-message: true
+    cache-duration: 3600
 logging:
   level:
+    org.springframework.web: DEBUG
+    org.springframework.context.i18n: DEBUG
     org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping: TRACE  # \u6253\u5370\u6240\u6709\u6CE8\u518C\u7684\u63A5\u53E3\u8DEF\u5F84
     org.hibernate.type.descriptor.sql.BasicBinder: TRACE  # \u663E\u793ASQL\u53C2\u6570
     org.hibernate.type.descriptor.sql: TRACE

backend/src/main/resources/messages_cn.properties

@@ -0,0 +1,12 @@
+# 中文
+response.success=操作成功
+response.error=系统错误
+response.invalid.param=无效的参数
+response.unauthorized=未授权
+response.forbidden=禁止访问
+response.not.found=资源未找到
+response.conflict=资源冲突
+
+user.not.found=用户不存在
+user.username.exists=用户名已存在
+user.email.exists=邮箱已存在 

backend/src/main/resources/messages_en.properties

@@ -0,0 +1,12 @@
+# \u9ED8\u8BA4\u8BED\u8A00\uFF08\u82F1\u6587\uFF09
+response.success=Success
+response.error=System Error
+response.invalid.param=Invalid Parameter
+response.unauthorized=Unauthorized
+response.forbidden=Forbidden
+response.not.found=Resource Not Found
+response.conflict=Resource Conflict
+
+user.not.found=User not found
+user.username.exists=Username already exists
+user.email.exists=Email already exists