diff --git a/src/main/java/com/sczx/user/service/impl/UserServiceImpl.java b/src/main/java/com/sczx/user/service/impl/UserServiceImpl.java
index b8d6ef7..f48af25 100644
--- a/src/main/java/com/sczx/user/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/sczx/user/service/impl/UserServiceImpl.java
@@ -1,5 +1,6 @@
 package com.sczx.user.service.impl;
 
+import com.sczx.user.exception.BizException;
 import com.sczx.user.model.LoginRequest;
 import com.sczx.user.service.IUserService;
 import com.sczx.user.util.JwtUtil;
@@ -76,7 +77,7 @@ public class UserServiceImpl implements IUserService {
     public String miniProgramLogin(String code) {
         String openid = WECHAT_CODE_TO_OPENID.get(code);
         if (openid == null) {
-            throw new RuntimeException("无效的微信登录code");
+            throw new BizException("无效的微信登录code");
         }
         // 存入 Redis
         return jwtUtil.generateToken(openid, "USER");
@@ -86,7 +87,7 @@ public class UserServiceImpl implements IUserService {
     public String miniProgramRegister(String code, String username, String password) {
         String openid = WECHAT_CODE_TO_OPENID.get(code);
         if (openid == null) {
-            throw new RuntimeException("无效的微信登录code");
+            throw new BizException("无效的微信登录code");
         }
         // 模拟注册逻辑
 //        userRepository.save(new User(openid, username, password));
@@ -97,7 +98,7 @@ public class UserServiceImpl implements IUserService {
     public String alipayMiniProgramLogin(String userId) {
         String realUserId = ALIPAY_ID_TO_USERID.get(userId);
         if (realUserId == null) {
-            throw new RuntimeException("无效的支付宝用户ID");
+            throw new BizException("无效的支付宝用户ID");
         }
         return jwtUtil.generateToken(realUserId, "USER");
     }
@@ -106,7 +107,7 @@ public class UserServiceImpl implements IUserService {
     public String alipayMiniProgramRegister(String userId, String username, String password) {
         String realUserId = ALIPAY_ID_TO_USERID.get(userId);
         if (realUserId == null) {
-            throw new RuntimeException("无效的支付宝用户ID");
+            throw new BizException("无效的支付宝用户ID");
         }
         // 模拟注册逻辑
 //        userRepository.save(new User(realUserId, username, password));