diff --git a/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysCategoryServiceImpl.java b/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysCategoryServiceImpl.java
index 2581a9fc..109002fd 100644
--- a/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysCategoryServiceImpl.java
+++ b/jero-boot/jero-boot-module-system/src/main/java/com/jero/modules/system/service/impl/SysCategoryServiceImpl.java
@@ -137,7 +137,7 @@ public class SysCategoryServiceImpl extends ServiceImpl<SysCategoryMapper, SysCa
     private String queryTreeChildIds(String ids) {
         //获取id数组
         String[] idArr = ids.split(",");
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         for (String pidVal : idArr) {
             if (pidVal != null && !sb.toString().contains(pidVal)) {
                 if (sb.toString().length() > 0) {
@@ -157,7 +157,7 @@ public class SysCategoryServiceImpl extends ServiceImpl<SysCategoryMapper, SysCa
      * @return
      */
     private String queryTreePids(String ids) {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         //获取id数组
         String[] idArr = ids.split(",");
         for (String id : idArr) {
@@ -190,7 +190,7 @@ public class SysCategoryServiceImpl extends ServiceImpl<SysCategoryMapper, SysCa
      * @param sb
      * @return
      */
-    private StringBuffer getTreeChildIds(String pidVal, StringBuffer sb) {
+    private StringBuilder getTreeChildIds(String pidVal, StringBuilder sb) {
         LambdaQueryWrapper<SysCategory> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(SysCategory::getPid, pidVal);
         List<SysCategory> dataList = baseMapper.selectList(queryWrapper);