diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/base/BaseServiceImpl.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/base/BaseServiceImpl.java
index 9aea0c1a..cea583b6 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/base/BaseServiceImpl.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/base/BaseServiceImpl.java
@@ -17,8 +17,8 @@
 package top.charles7c.cnadmin.common.base;
 
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -104,7 +104,7 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
     public List<Tree<Long>> tree(Q query, SortQuery sortQuery, boolean isSimple) {
         List<V> list = this.list(query, sortQuery);
         if (CollUtil.isEmpty(list)) {
-            return Collections.emptyList();
+            return new ArrayList<>(0);
         }
 
         // 如果构建简单树结构，则不包含基本树结构之外的扩展字段
@@ -205,7 +205,7 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
             queryWrapper.orderBy(order != null, order.isAscending(), StrUtil.toUnderlineCase(order.getProperty()));
         }
         List<T> entityList = baseMapper.selectList(queryWrapper);
-        return CollUtil.isNotEmpty(entityList) ? BeanUtil.copyToList(entityList, targetClass) : Collections.emptyList();
+        return BeanUtil.copyToList(entityList, targetClass);
     }
 
     /**
diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/constant/CharConsts.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/constant/CharConsts.java
index dee0a0ea..c319567e 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/constant/CharConsts.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/constant/CharConsts.java
@@ -34,4 +34,9 @@ public class CharConsts implements CharPool {
      * 分号
      */
     public static final String SEMICOLON = ";";
+
+    /**
+     * 空字符串
+     */
+    public static final String EMPTY = "";
 }
diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/PageDataVO.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/PageDataVO.java
index 5d50c09c..8b11b837 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/PageDataVO.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/PageDataVO.java
@@ -120,7 +120,7 @@ public class PageDataVO<V> {
         int fromIndex = (page - 1) * size;
         int toIndex = page * size + size;
         if (fromIndex > list.size()) {
-            pageDataVO.setList(new ArrayList<>());
+            pageDataVO.setList(new ArrayList<>(0));
         } else if (toIndex >= list.size()) {
             pageDataVO.setList(list.subList(fromIndex, list.size()));
         } else {
diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/MailUtils.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/MailUtils.java
index 2ec7eef7..6f8ceeb4 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/MailUtils.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/MailUtils.java
@@ -18,8 +18,8 @@ package top.charles7c.cnadmin.common.util;
 
 import java.io.File;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
 
 import javax.mail.MessagingException;
@@ -229,7 +229,7 @@ public class MailUtils {
      */
     private static List<String> splitAddress(String addresses) {
         if (StrUtil.isBlank(addresses)) {
-            return Collections.emptyList();
+            return new ArrayList<>(0);
         }
 
         List<String> result;
diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/StreamUtils.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/StreamUtils.java
index 429fc02b..48d44b43 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/StreamUtils.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/StreamUtils.java
@@ -24,10 +24,10 @@ import java.util.stream.Collectors;
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 
-import org.apache.commons.lang3.StringUtils;
-
 import cn.hutool.core.collection.CollUtil;
 
+import top.charles7c.cnadmin.common.constant.CharConsts;
+
 /**
  * Stream 工具类
  *
@@ -52,7 +52,7 @@ public class StreamUtils {
      */
     public static <E> String join(Collection<E> collection, Function<E, String> function, CharSequence delimiter) {
         if (CollUtil.isEmpty(collection)) {
-            return StringUtils.EMPTY;
+            return CharConsts.EMPTY;
         }
         return collection.stream().map(function).filter(Objects::nonNull).collect(Collectors.joining(delimiter));
     }
diff --git a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/TreeUtils.java b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/TreeUtils.java
index d5d372a1..ac4cb246 100644
--- a/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/TreeUtils.java
+++ b/continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/TreeUtils.java
@@ -16,7 +16,7 @@
 
 package top.charles7c.cnadmin.common.util;
 
-import java.util.Collections;
+import java.util.ArrayList;
 import java.util.List;
 
 import lombok.AccessLevel;
@@ -79,7 +79,7 @@ public class TreeUtils {
      */
     public static <T, E> List<Tree<E>> build(List<T> list, TreeNodeConfig treeNodeConfig, NodeParser<T, E> nodeParser) {
         if (CollUtil.isEmpty(list)) {
-            return Collections.emptyList();
+            return new ArrayList<>(0);
         }
         E parentId = (E)ReflectUtil.getFieldValue(list.get(0), treeNodeConfig.getParentIdKey());
         return TreeUtil.build(list, parentId, treeNodeConfig, nodeParser);
diff --git a/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleMenuServiceImpl.java b/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleMenuServiceImpl.java
index ffdbff35..a4569627 100644
--- a/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleMenuServiceImpl.java
+++ b/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleMenuServiceImpl.java
@@ -16,7 +16,7 @@
 
 package top.charles7c.cnadmin.system.service.impl;
 
-import java.util.Collections;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -60,7 +60,7 @@ public class RoleMenuServiceImpl implements RoleMenuService {
     @Override
     public List<Long> listMenuIdByRoleIds(List<Long> roleIds) {
         if (CollUtil.isEmpty(roleIds)) {
-            return Collections.emptyList();
+            return new ArrayList<>(0);
         }
         return roleMenuMapper.selectMenuIdsByRoleIds(roleIds);
     }
diff --git a/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleServiceImpl.java b/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleServiceImpl.java
index 68de0fd4..65a7de5e 100644
--- a/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleServiceImpl.java
+++ b/continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleServiceImpl.java
@@ -16,7 +16,7 @@
 
 package top.charles7c.cnadmin.system.service.impl;
 
-import java.util.Collections;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -141,7 +141,7 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
                 List<Long> menuIds = list.stream().map(MenuVO::getMenuId).collect(Collectors.toList());
                 detailVO.setMenuIds(menuIds);
             } else {
-                detailVO.setMenuIds(roleMenuService.listMenuIdByRoleIds(Collections.singletonList(roleId)));
+                detailVO.setMenuIds(roleMenuService.listMenuIdByRoleIds(CollUtil.newArrayList(roleId)));
             }
             detailVO.setDeptIds(roleDeptService.listDeptIdByRoleId(roleId));
         }
@@ -150,7 +150,7 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
     @Override
     public List<LabelValueVO<Long>> buildDict(List<RoleVO> list) {
         if (CollUtil.isEmpty(list)) {
-            return Collections.emptyList();
+            return new ArrayList<>(0);
         }
         return list.stream().map(r -> new LabelValueVO<>(r.getRoleName(), r.getRoleId())).collect(Collectors.toList());
     }
@@ -158,9 +158,6 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
     @Override
     public List<String> listRoleNamesByRoleIds(List<Long> roleIds) {
         List<RoleDO> roleList = super.lambdaQuery().select(RoleDO::getRoleName).in(RoleDO::getRoleId, roleIds).list();
-        if (CollUtil.isEmpty(roleList)) {
-            return Collections.emptyList();
-        }
         return roleList.stream().map(RoleDO::getRoleName).collect(Collectors.toList());
     }
 
@@ -168,9 +165,6 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
     public Set<String> listRoleCodesByUserId(Long userId) {
         List<Long> roleIds = userRoleService.listRoleIdsByUserId(userId);
         List<RoleDO> roleList = super.lambdaQuery().select(RoleDO::getRoleCode).in(RoleDO::getRoleId, roleIds).list();
-        if (CollUtil.isEmpty(roleList)) {
-            return Collections.emptySet();
-        }
         return roleList.stream().map(RoleDO::getRoleCode).collect(Collectors.toSet());
     }
 }