diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysMenuServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysMenuServiceImpl.java
index 4d3406757..8c6e6b109 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysMenuServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysMenuServiceImpl.java
@@ -58,7 +58,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
      */
     @Override
     public List<SysMenu> selectMenuList(SysMenu menu, Long userId) {
-        List<SysMenu> menuList = null;
+        List<SysMenu> menuList;
         // 管理员显示所有菜单信息
         if (LoginHelper.isAdmin(userId)) {
             menuList = baseMapper.selectList(new LambdaQueryWrapper<SysMenu>()
@@ -124,7 +124,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
      */
     @Override
     public List<SysMenu> selectMenuTreeByUserId(Long userId) {
-        List<SysMenu> menus = null;
+        List<SysMenu> menus;
         if (LoginHelper.isAdmin(userId)) {
             menus = baseMapper.selectMenuTreeAll();
         } else {
@@ -153,7 +153,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
      */
     @Override
     public List<RouterVo> buildMenus(List<SysMenu> menus) {
-        List<RouterVo> routers = new LinkedList<RouterVo>();
+        List<RouterVo> routers = new LinkedList<>();
         for (SysMenu menu : menus) {
             RouterVo router = new RouterVo();
             router.setHidden("1".equals(menu.getVisible()));
@@ -169,7 +169,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
                 router.setChildren(buildMenus(cMenus));
             } else if (isMenuFrame(menu)) {
                 router.setMeta(null);
-                List<RouterVo> childrenList = new ArrayList<RouterVo>();
+                List<RouterVo> childrenList = new ArrayList<>();
                 RouterVo children = new RouterVo();
                 children.setPath(menu.getPath());
                 children.setComponent(menu.getComponent());
@@ -181,7 +181,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
             } else if (menu.getParentId().intValue() == 0 && isInnerLink(menu)) {
                 router.setMeta(new MetaVo(menu.getMenuName(), menu.getIcon()));
                 router.setPath("/");
-                List<RouterVo> childrenList = new ArrayList<RouterVo>();
+                List<RouterVo> childrenList = new ArrayList<>();
                 RouterVo children = new RouterVo();
                 String routerPath = innerLinkReplaceEach(menu.getPath());
                 children.setPath(routerPath);
@@ -394,7 +394,7 @@ public class SysMenuServiceImpl implements ISysMenuService {
      * @return String
      */
     public List<SysMenu> getChildPerms(List<SysMenu> list, int parentId) {
-        List<SysMenu> returnList = new ArrayList<SysMenu>();
+        List<SysMenu> returnList = new ArrayList<>();
         for (SysMenu t : list) {
             // 一、根据传入的某个父节点ID,遍历该父节点的所有子节点
             if (t.getParentId() == parentId) {