diff --git a/04.系统编码/Backend/src/main/java/com/userinformation/backend/controller/UserController.java b/04.系统编码/Backend/src/main/java/com/userinformation/backend/controller/UserController.java
index 17128f6..bd4fbac 100644
--- a/04.系统编码/Backend/src/main/java/com/userinformation/backend/controller/UserController.java
+++ b/04.系统编码/Backend/src/main/java/com/userinformation/backend/controller/UserController.java
@@ -1,5 +1,6 @@
 package com.userinformation.backend.controller;
 
+import com.alibaba.druid.util.StringUtils;
 import com.userinformation.backend.model.dao.User;
 import com.userinformation.backend.service.UserService;
 import com.userinformation.backend.util.RequestResult;
@@ -7,6 +8,8 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.Objects;
+
 @RestController
 @RequestMapping("user")
 public class UserController {
@@ -16,6 +19,10 @@ public class UserController {
 
     @RequestMapping("userLogin")
     public RequestResult userLogin(String userAccountNumber, String userPassword){
+        User user = userService.userLogin(userAccountNumber, userPassword);
+        if(user == null){
+            return RequestResult.fail("用户名或密码错误");
+        }
         return RequestResult.success(userService.userLogin(userAccountNumber, userPassword));
     }