diff --git a/play-admin/src/main/java/com/starry/admin/modules/system/service/impl/SysUserServiceImpl.java b/play-admin/src/main/java/com/starry/admin/modules/system/service/impl/SysUserServiceImpl.java
index 080de39..0782f52 100644
--- a/play-admin/src/main/java/com/starry/admin/modules/system/service/impl/SysUserServiceImpl.java
+++ b/play-admin/src/main/java/com/starry/admin/modules/system/service/impl/SysUserServiceImpl.java
@@ -270,6 +270,11 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUserEntity
         if (user.getMobile().equals(param.getMobile())) {
             throw new RuntimeException("新旧手机号不能相同~");
         }
-        this.update(Wrappers.lambdaUpdate(SysUserEntity.class).eq(SysUserEntity::getUserId, param.getUserId()).set(SysUserEntity::getMobile, param.getMobile()));
+        // 查询是否已有相同手机号
+        long count = this.count(Wrappers.lambdaQuery(SysUserEntity.class).eq(SysUserEntity::getMobile, param.getMobile()).ne(SysUserEntity::getUserId, param.getUserId()));
+        if (count > 0) {
+            throw new RuntimeException("系统中已有该手机号，无法录入~");
+        }
+        this.update(Wrappers.lambdaUpdate(SysUserEntity.class).eq(SysUserEntity::getUserId, param.getUserId()).set(SysUserEntity::getUserCode, param.getMobile()).set(SysUserEntity::getMobile, param.getMobile()));
     }
 }
diff --git a/play-common/src/main/java/com/starry/common/utils/IdUtils.java b/play-common/src/main/java/com/starry/common/utils/IdUtils.java
index a130902..cbe96ce 100644
--- a/play-common/src/main/java/com/starry/common/utils/IdUtils.java
+++ b/play-common/src/main/java/com/starry/common/utils/IdUtils.java
@@ -1,6 +1,6 @@
 package com.starry.common.utils;
 
-import java.util.UUID;
+import cn.hutool.core.util.RandomUtil;
 
 /**
  * @author admin
@@ -10,11 +10,11 @@ public class IdUtils {
 
 
     /**
-     * 生成16位的UUID
+     * 生成8位的UUID
      *
      * @return UUID
      */
     public static String getUuid() {
-        return UUID.randomUUID().toString().replaceAll("-", "").substring(0, 12);
+        return RandomUtil.randomString(8);
     }
 }