【fix】

src/main/java/com/zzsn/event/service/impl/KeyWordsServiceImpl.java

 package com.zzsn.event.service.impl;
 
 import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONArray;
 import com.alibaba.fastjson2.JSONObject;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
@@ -423,10 +424,12 @@ public class KeyWordsServiceImpl extends ServiceImpl<KeyWordsMapper, KeyWords> i
                 relation.setKeywordsGroupIds(keyWordsId);
                 relation.setRelationType(String.valueOf(i));
                 relation.setExpressionStr(keyWordsId);
+                JSONArray jsonArray = new JSONArray();
                 JSONObject jsonObject = new JSONObject();
                 jsonObject.put("title", wordsName);
                 jsonObject.put("value", keyWordsId);
-                relation.setParamsStr(JSON.toJSONString(jsonObject));
+                jsonArray.add(jsonObject);
+                relation.setParamsStr(JSON.toJSONString(jsonArray));
                 relationList.add(relation);
             }
         } else if (type == 2) {
@@ -443,10 +446,12 @@ public class KeyWordsServiceImpl extends ServiceImpl<KeyWordsMapper, KeyWords> i
             relation.setKeywordsGroupIds(keyWordsId);
             relation.setRelationType("3");
             relation.setExpressionStr(keyWordsId);
+            JSONArray jsonArray = new JSONArray();
             JSONObject jsonObject = new JSONObject();
             jsonObject.put("title", wordsName);
             jsonObject.put("value", keyWordsId);
-            relation.setParamsStr(JSON.toJSONString(jsonObject));
+            jsonArray.add(jsonObject);
+            relation.setParamsStr(JSON.toJSONString(jsonArray));
             relationList.add(relation);
         }
         subjectKeywordsMapService.saveBatch(dataList);