diff --git a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/SysUserRoleService.java b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/SysUserRoleService.java
index 47fb83667c79213dd6cdaf091843ad7bb26ea005..910b3617e39fbc96bb4747039686565247c58b7e 100644
--- a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/SysUserRoleService.java
+++ b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/SysUserRoleService.java
@@ -4,5 +4,16 @@ package com.youlai.admin.service;
 import com.baomidou.mybatisplus.extension.service.IService;
 import com.youlai.admin.pojo.entity.SysUserRole;
 
+import java.util.List;
+
 public interface SysUserRoleService extends IService<SysUserRole> {
+
+    /**
+     * 保存用户角色
+     *
+     * @param userId
+     * @param roleIds
+     * @return
+     */
+     boolean saveUserRoles(Long userId, List<Long> roleIds);
 }
diff --git a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserRoleServiceImpl.java b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserRoleServiceImpl.java
index d3f58177382d44bb57646568929e3df474225458..2d7f60ec99f7962ac2b6ee9dc846a99b7a99e0f7 100644
--- a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserRoleServiceImpl.java
+++ b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserRoleServiceImpl.java
@@ -1,12 +1,68 @@
 package com.youlai.admin.service.impl;
 
+import cn.hutool.core.collection.CollectionUtil;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
-import com.youlai.admin.pojo.entity.SysUserRole;
 import com.youlai.admin.mapper.SysUserRoleMapper;
+import com.youlai.admin.pojo.entity.SysUserRole;
 import com.youlai.admin.service.SysUserRoleService;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
+import java.util.stream.Collectors;
+
 @Service
 public class SysUserRoleServiceImpl extends ServiceImpl<SysUserRoleMapper, SysUserRole> implements SysUserRoleService {
 
+    /**
+     * 保存用户角色
+     *
+     * @param userId
+     * @param roleIds
+     * @return
+     */
+    @Override
+    public boolean saveUserRoles(Long userId, List<Long> roleIds) {
+
+        if (userId == null || CollectionUtil.isEmpty(roleIds)) {
+            return false;
+        }
+
+        // 用户原角色ID集合
+        List<Long> userRoleIds = this.list(new LambdaQueryWrapper<SysUserRole>()
+                        .eq(SysUserRole::getUserId, userId))
+                .stream()
+                .map(item -> item.getRoleId())
+                .collect(Collectors.toList());
+
+        // 新增用户角色
+        List<Long> saveRoleIds;
+        if (CollectionUtil.isEmpty(userRoleIds)) {
+            saveRoleIds = roleIds;
+        } else {
+            saveRoleIds = roleIds.stream()
+                    .filter(roleId -> !userRoleIds.contains(roleId))
+                    .collect(Collectors.toList());
+        }
+
+        List<SysUserRole> saveUserRoles = saveRoleIds
+                .stream()
+                .map(roleId -> new SysUserRole(userId, roleId))
+                .collect(Collectors.toList());
+        this.saveBatch(saveUserRoles);
+
+        // 删除用户角色
+        if (CollectionUtil.isNotEmpty(userRoleIds)) {
+            List<Long> removeRoleIds = userRoleIds.stream()
+                    .filter(roleId -> !roleIds.contains(roleId))
+                    .collect(Collectors.toList());
+
+            this.remove(new LambdaQueryWrapper<SysUserRole>()
+                    .eq(SysUserRole::getUserId, userId)
+                    .in(SysUserRole::getRoleId, removeRoleIds)
+            );
+        }
+        return true;
+
+    }
 }
diff --git a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserServiceImpl.java b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserServiceImpl.java
index 9260cb74cf81f8bf6310a233c161ed7c04b4757a..f14d4f72c0ea1c6c96f9f21222c485b79295e6bf 100644
--- a/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserServiceImpl.java
+++ b/youlai-admin/admin-boot/src/main/java/com/youlai/admin/service/impl/SysUserServiceImpl.java
@@ -13,12 +13,9 @@ import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.google.common.collect.Lists;
-import com.youlai.admin.pojo.vo.user.UserVO;
-import com.youlai.common.constant.SystemConstants;
-import com.youlai.common.enums.GenderEnum;
-import com.youlai.admin.listener.excel.UserImportListener;
 import com.youlai.admin.converter.UserConverter;
 import com.youlai.admin.dto.UserAuthDTO;
+import com.youlai.admin.listener.excel.UserImportListener;
 import com.youlai.admin.mapper.SysUserMapper;
 import com.youlai.admin.pojo.dto.UserImportDTO;
 import com.youlai.admin.pojo.entity.SysUser;
@@ -29,10 +26,13 @@ import com.youlai.admin.pojo.po.UserPO;
 import com.youlai.admin.pojo.query.UserPageQuery;
 import com.youlai.admin.pojo.vo.user.LoginUserVO;
 import com.youlai.admin.pojo.vo.user.UserExportVO;
+import com.youlai.admin.pojo.vo.user.UserVO;
 import com.youlai.admin.service.SysPermissionService;
 import com.youlai.admin.service.SysUserRoleService;
 import com.youlai.admin.service.SysUserService;
 import com.youlai.common.base.IBaseEnum;
+import com.youlai.common.constant.SystemConstants;
+import com.youlai.common.enums.GenderEnum;
 import com.youlai.common.web.util.UserUtils;
 import lombok.RequiredArgsConstructor;
 import org.springframework.security.crypto.password.PasswordEncoder;
@@ -44,7 +44,6 @@ import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Optional;
 import java.util.stream.Collectors;
 
 /**
@@ -109,6 +108,11 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
     @Override
     public boolean saveUser(UserForm userForm) {
 
+        String username = userForm.getUsername();
+
+        int count = this.count(new LambdaQueryWrapper<SysUser>().eq(SysUser::getUsername, username));
+        Assert.isTrue(count == 0, "用户名已存在");
+
         // 实体转换 form->entity
         SysUser entity = userConverter.form2Entity(userForm);
 
@@ -120,16 +124,8 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
         boolean result = this.save(entity);
 
         if (result) {
-            // 保存用户角色关联信息
-            Long userId = entity.getId();
-            List<Long> roleIds = userForm.getRoleIds();
-            if (CollectionUtil.isNotEmpty(roleIds)) {
-                List<SysUserRole> userRoles = roleIds
-                        .stream()
-                        .map(roleId -> new SysUserRole(userId, roleId))
-                        .collect(Collectors.toList());
-                userRoleService.saveBatch(userRoles);
-            }
+            // 保存用户角色
+            userRoleService.saveUserRoles(entity.getId(), userForm.getRoleIds());
         }
         return result;
     }
@@ -144,38 +140,25 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
     @Override
     @Transactional
     public boolean updateUser(Long userId, UserForm userForm) {
-        // 用户的旧角色ID集合
-        List<Long> oldRoleIds = userRoleService.list(new LambdaQueryWrapper<SysUserRole>()
-                .eq(SysUserRole::getUserId, userId))
-                .stream()
-                .map(item -> item.getRoleId())
-                .collect(Collectors.toList());
-
-        // 用户的新角色ID集合
-        List<Long> newRoleIds = userForm.getRoleIds();
 
-        // 新增用户的角色
-        List<Long> addRoleIds = newRoleIds.stream().filter(roleId -> !oldRoleIds.contains(roleId)).collect(Collectors.toList());
-        List<SysUserRole> addUserRoles = Optional.ofNullable(addRoleIds).orElse(new ArrayList<>())
-                .stream().map(roleId -> new SysUserRole(userId, roleId))
-                .collect(Collectors.toList());
-        userRoleService.saveBatch(addUserRoles);
-
-        // 删除用户的角色
-        List<Long> removeRoleIds = oldRoleIds.stream().filter(roleId -> !newRoleIds.contains(roleId)).collect(Collectors.toList());
-        if (CollectionUtil.isNotEmpty(removeRoleIds)) {
-            userRoleService.remove(new LambdaQueryWrapper<SysUserRole>()
-                    .eq(SysUserRole::getUserId, userId)
-                    .in(SysUserRole::getRoleId, removeRoleIds)
-            );
-        }
+        String username = userForm.getUsername();
 
+        int count = this.count(new LambdaQueryWrapper<SysUser>()
+                .eq(SysUser::getUsername, username)
+                .ne(SysUser::getId,userId)
+        );
+        Assert.isTrue(count == 0, "用户名已存在");
 
         // form -> entity
         SysUser entity = userConverter.form2Entity(userForm);
 
         // 修改用户
         boolean result = this.updateById(entity);
+
+        if (result) {
+            // 保存用户角色
+            userRoleService.saveUserRoles(entity.getId(), userForm.getRoleIds());
+        }
         return result;
     }
 
@@ -358,4 +341,5 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
         return loginUserVO;
     }
 
+
 }