修改通用响应类，增加code。

并移除errrepository

src/main/java/co/jp/app/common/ApiResponse.java

@@ -1,59 +1,64 @@
 package co.jp.app.common;
 
-import java.util.Objects;
+import co.jp.app.common.ResultCode;
 
 public class ApiResponse<T> {
     private boolean success;
+    private int code;
     private String message;
     private T data;
 
-    public static <T> ApiResponse<T> success(T data) {
-
-        return new ApiResponse<>(true, null, data);
-    }
-
-    public static <T> ApiResponse<T> fail(String message) {
-
-        return new ApiResponse<>(false, message, null);
-    }
-
-    public ApiResponse() {
-    }
-
-    public ApiResponse(boolean success, String message, T data) {
-        this.success = success;
-        this.message = message;
+    private ApiResponse(ResultCode resultCode, T data) {
+        this.code = resultCode.getCode();
+        this.message = resultCode.getMessage();
+        this.success = (resultCode.getCode() == ResultCode.SUCCESS.getCode());
         this.data = data;
     }
 
+    public static <T> ApiResponse<T> success(T data) {
+        return new ApiResponse<>(ResultCode.SUCCESS, data);
+    }
+
+    public static <T> ApiResponse<T> success() {
+        return success(null);
+    }
+
+    public static <T> ApiResponse<T> fail(ResultCode resultCode) {
+        if (resultCode == ResultCode.SUCCESS) {
+
+            throw new IllegalArgumentException("Cannot use SUCCESS ResultCode for fail method. Use a specific error code.");
+        }
+        return new ApiResponse<>(resultCode, null);
+    }
+
+    public static <T> ApiResponse<T> fail(ResultCode resultCode, T data) {
+        if (resultCode == ResultCode.SUCCESS) {
+            throw new IllegalArgumentException("Cannot use SUCCESS ResultCode for fail method. Use a specific error code.");
+        }
+        return new ApiResponse<>(resultCode, data);
+    }
+
     public boolean isSuccess() {
         return success;
     }
 
-    public void setSuccess(boolean success) {
-        this.success = success;
+    public int getCode() {
+        return code;
     }
 
     public String getMessage() {
         return message;
     }
 
-    public void setMessage(String message) {
-        this.message = message;
-    }
-
     public T getData() {
         return data;
     }
 
-    public void setData(T data) {
-        this.data = data;
-    }
-
     @Override
     public String toString() {
         return "ApiResponse{" +
                 "success=" + success +
+                ", code=" + code +
                 ", message='" + message + '\'' +
                 ", data=" + data +
                 '}';

src/main/java/co/jp/app/common/ResultCode.java

@@ -0,0 +1,84 @@
+package co.jp.app.common;
+
+public enum ResultCode {
+
+    SUCCESS(200, "Success"), // 通常与 HTTP 200 OK 对应
+
+    // 客户端错误段 (1000 - 1999)
+    BAD_REQUEST(1000, "HTTP 400 Bad Request"),
+    UNAUTHORIZED(1001, "HTTP 401 Unauthorized"),
+    FORBIDDEN(1002, "HTTP 403 Forbidden"),
+    NOT_FOUND(1003, "HTTP 404 Not Found"),
+    METHOD_NOT_ALLOWED(1004, "HTTP 405 Method Not Allowed"),
+    REQUEST_TIMEOUT(1005, "HTTP 408 Request Timeout"),
+    CONFLICT(1006, "HTTP 409 Conflict"),
+    UNSUPPORTED_MEDIA_TYPE(1007, "HTTP 415 Unsupported Media Type"), // 对应
+    TOO_MANY_REQUESTS(1008, "HTTP 429 Too Many Requests"), // 对应
+    VALIDATION_ERROR(1009, "Parameter validation failure"),           // 通常由 @Valid 触发，可包含更详细的字段错误信息
+
+    // 服务端错误段 (2000 - 2999) - 通常建议与 HTTP 5xx 状态码含义相似
+    INTERNAL_SERVER_ERROR(2000, "HTTP 500 Internal Server Error"),
+    SERVICE_UNAVAILABLE(2001, "HTTP 503 Service Unavailable"),
+    GATEWAY_TIMEOUT(2002, "HTTP 504 Gateway Timeout"),
+    DATABASE_ERROR(2003, "Database error"),
+    NETWORK_ERROR(2004, "Network error"),
+    THIRD_PARTY_SERVICE_ERROR(2005, "Third-party service error"),
+
+    // ================================== 用户模块状态码 (3000 - 3999) ==================================
+    // 注册相关
+    // USER_REGISTRATION_SUCCESS(3000, "用户注册成功"), // 成功状态也可以用通用的 SUCCESS
+    USER_EMAIL_ALREADY_EXISTS(3001, "Email already exists"),
+    // USER_USERNAME_ALREADY_EXISTS(3002, "Username"),
+    USER_PASSWORD_TOO_SHORT(3003, "password too short"),
+    USER_PASSWORD_TOO_WEAK(3004, "password too weak"),
+    USER_REGISTRATION_FAILED(3005, "User registration failed"),
+
+    // 登录相关
+    // USER_LOGIN_SUCCESS(3100, "登录成功"),
+    USER_ACCOUNT_NOT_FOUND(3101, "User account not found"),
+    USER_INVALID_CREDENTIALS(3102, "User invalid credentials"),
+    USER_ACCOUNT_LOCKED(3103, "User account locked"),
+    USER_ACCOUNT_DISABLED(3104, "User account disabled"),
+    USER_ACCOUNT_EXPIRED(3105, "User account expired"),
+    USER_LOGIN_FAILED(3106, "User login failed"),
+    USER_SESSION_EXPIRED(3107, "User session expired"),
+    USER_TOKEN_INVALID(3108, "User token invalid"),
+    USER_TOKEN_EXPIRED(3109, "User token expired(Token"),
+    USER_REFRESH_TOKEN_INVALID(3110, "User refresh token invalid"),
+    // USER_REFRESH_TOKEN_EXPIRED(3111, "User refresh token expired(Refresh Token"),
+    USER_LOGOUT_SUCCESS(3112, "loignout success"),
+
+    // 用户信息相关
+    USER_PROFILE_NOT_FOUND(3200, "User profile not found"),
+    USER_UPDATE_PROFILE_SUCCESS(3201, "User profile updated"),
+    USER_UPDATE_PROFILE_FAILED(3202, "User profile update failed"),
+    USER_CHANGE_PASSWORD_SUCCESS(3203, "Change password success"),
+    USER_CHANGE_PASSWORD_FAILED(3204, "Change password failed"),
+    USER_OLD_PASSWORD_MISMATCH(3205, "Old password mismatch"),
+
+    // 权限相关 (如果你的用户模块包含复杂权限)
+    // USER_PERMISSION_DENIED(3300, "用户权限不足（细粒度）"), // 可用于补充 FORBIDDEN
+
+    ;
+
+    private final int code;
+    private final String message;
+
+    ResultCode(int code, String message) {
+        this.code = code;
+        this.message = message;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    // (可选) 允许覆盖默认消息的方法，用于更具体的场景
+    public String getMessage(String customDetail) {
+        return this.message + (customDetail == null || customDetail.isEmpty() ? "" : " (" + customDetail + ")");
+    }
+}

src/main/java/co/jp/app/controller/UserController.java

@@ -1,6 +1,7 @@
 package co.jp.app.controller;
 
 import co.jp.app.common.ApiResponse;
+import co.jp.app.common.ResultCode;
 import co.jp.app.dto.LoginDto;
 import co.jp.app.dto.RegistrationDto;
 import co.jp.app.service.JwtService;
@@ -15,9 +16,7 @@ import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.web.bind.annotation.*;
 
-import co.jp.app.entity.ErrorEntity;
 import co.jp.app.entity.UserEntity;
-import co.jp.app.service.ErraService;
 import co.jp.app.service.UserService;
 
 import java.util.HashMap;
@@ -46,7 +45,7 @@ public class UserController {
             return ResponseEntity.status(HttpStatus.CREATED).body(ApiResponse.success(registeredUser.getEmail()));
         } catch (Exception e) {
 
-            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(ApiResponse.fail("ユーザー登録失敗しました。"));
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(ApiResponse.fail(ResultCode.BAD_REQUEST,null));
         }
     }
 
@@ -59,7 +58,7 @@ public class UserController {
             SecurityContextHolder.getContext().setAuthentication(authentication);
             UserDetails userDetails = (UserDetails) authentication.getPrincipal();
 
-            String jwtToken = jwtService.generateToken(userDetails); // 生成单一的Token
+            String jwtToken = jwtService.generateToken(userDetails);
 
             Map<String, String> tokenResponse = new HashMap<>();
             tokenResponse.put("token", jwtToken);
@@ -68,10 +67,10 @@ public class UserController {
 
         } catch (BadCredentialsException e) {
 
-            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(ApiResponse.fail("メールアドレスまたはパスワードが間違っています。"));
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(ApiResponse.fail(ResultCode.UNAUTHORIZED,null));
         } catch (Exception e) {
 
-            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(ApiResponse.fail("サーバーエラー。"));
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(ApiResponse.fail(ResultCode.SERVICE_UNAVAILABLE,null));
         }
     }
 }