diff --git a/electrmangnetic/src/main/java/com/electromagnetic/industry/software/manage/controller/AiChatController.java b/electrmangnetic/src/main/java/com/electromagnetic/industry/software/manage/controller/AiChatController.java
index 78a6d04..4c46ee3 100644
--- a/electrmangnetic/src/main/java/com/electromagnetic/industry/software/manage/controller/AiChatController.java
+++ b/electrmangnetic/src/main/java/com/electromagnetic/industry/software/manage/controller/AiChatController.java
@@ -1,6 +1,7 @@
 package com.electromagnetic.industry.software.manage.controller;
 
 import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.util.StrUtil;
 import com.electromagnetic.industry.software.common.resp.ElectromagneticResult;
 import com.electromagnetic.industry.software.common.util.ElectromagneticResultUtil;
 import com.electromagnetic.industry.software.manage.pojo.req.ChatQueryDTO;
@@ -29,7 +30,7 @@ public class AiChatController {
     @RequestMapping(value = "addKnowledge")
     public ElectromagneticResult<?> addKnowledge(@RequestParam("file") MultipartFile file) throws IOException {
         String fileType = FileUtil.extName(file.getOriginalFilename());
-        if (!fileType.equals("pdf")) {
+        if (!StrUtil.equals(fileType, "pdf")) {
             return ElectromagneticResultUtil.fail("-1", "当前仅支持pdf格式文件");
         }
         return aiChatService.addKnowledge(file);