[数据模型]getJsonExample改为使用jackson

src/main/java/com/tykj/workflowcore/model_layer/service/impl/ModelHelper.java

 package com.tykj.workflowcore.model_layer.service.impl;
 
 import com.alibaba.fastjson.JSON;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.tykj.workflowcore.model_layer.dao.AggregationDao;
 import com.tykj.workflowcore.model_layer.dao.ColumnInfoDao;
 import com.tykj.workflowcore.model_layer.dao.TableInfoDao;
@@ -38,15 +40,15 @@ public class ModelHelper {
         for (ColumnInfo columnInfo : columnInfos) {
             result.put(columnInfo.getFieldName(), null);
         }
-        List<Aggregation> relationships = aggregationDao.findAllByTableInfoExId(tableInfoExId);
-        for (Aggregation relationship : relationships) {
-            List<ColumnInfo> subColumnInfos = columnInfoDao.findAllByDbId(relationship.getSideTableId());
+        List<Aggregation> aggregations = aggregationDao.findAllByTableInfoExId(tableInfoExId);
+        for (Aggregation aggregation : aggregations) {
+            List<ColumnInfo> subColumnInfos = columnInfoDao.findAllByDbId(aggregation.getSideTableId());
             Map<String, Object> subResult = new HashMap<>();
             for (ColumnInfo subColumnInfo : subColumnInfos) {
                 subResult.put(subColumnInfo.getFieldName(), null);
             }
-            String connectionTableName = relationship.getConnectionTableName();
-            Integer relationshipType = relationship.getRelationship();
+            String connectionTableName = aggregation.getSideTableConnectionKey();
+            Integer relationshipType = aggregation.getRelationship();
             switch (relationshipType) {
                 case 0:
                     result.put(connectionTableName, subResult);
@@ -61,7 +63,11 @@ public class ModelHelper {
                     throw new RuntimeException(format("未识别的聚合类型:%s", relationshipType));
             }
         }
-        return JSON.toJSONString(result);
+        try {
+            return new ObjectMapper().writeValueAsString(result);
+        } catch (JsonProcessingException e) {
+            return "";
+        }
     }