[数据模型]增加提供普通数据模型json示例的方法

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.base.result.ApiException;
 import com.tykj.workflowcore.model_layer.dao.AggregationDao;
 import com.tykj.workflowcore.model_layer.dao.ColumnInfoDao;
 import com.tykj.workflowcore.model_layer.dao.TableInfoDao;
 import com.tykj.workflowcore.model_layer.dao.TableInfoExDao;
 import com.tykj.workflowcore.model_layer.entity.Aggregation;
 import com.tykj.workflowcore.model_layer.entity.ColumnInfo;
-import com.tykj.workflowcore.model_layer.entity.TableInfo;
 import com.tykj.workflowcore.model_layer.entity.TableInfoEx;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -33,10 +32,36 @@ public class ModelHelper {
     @Autowired
     private AggregationDao aggregationDao;
 
-    public String getJsonExample(Integer tableInfoExId) {
-        TableInfoEx tableInfoEX = tableInfoExDao.findById(tableInfoExId)
-                .orElseThrow(() -> new RuntimeException(format("未找到该id的数据:%s", tableInfoExId)));
+    /**
+     * 获取指定数据模型的json格式数据示例
+     *
+     * @param tableInfoId 指定id
+     * @return json格式的数据示例
+     */
+    public String getJsonExpample(Integer tableInfoId) {
+        Map<String, Object> result = new HashMap<>();
+        List<ColumnInfo> columnInfos = columnInfoDao.findAllByDbId(tableInfoId);
+        for (ColumnInfo columnInfo : columnInfos) {
+            result.put(columnInfo.getFieldName(), null);
+        }
+        try {
+            return new ObjectMapper().writeValueAsString(result);
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+            throw new ApiException("json转换时出现异常");
+        }
+    }
+
+    /**
+     * 获取指定聚合对象模型的json格式数据示例
+     *
+     * @param tableInfoExId 指定id
+     * @return json格式的数据示例
+     */
+    public String getExJsonExample(Integer tableInfoExId) {
         Map<String, Object> result = new HashMap<>();
+        TableInfoEx tableInfoEX = tableInfoExDao.findById(tableInfoExId)
+                .orElseThrow(() -> new ApiException(format("未找到该id的数据:%s", tableInfoExId)));
         List<ColumnInfo> columnInfos = columnInfoDao.findAllByDbId(tableInfoEX.getMainTableId());
         for (ColumnInfo columnInfo : columnInfos) {
             result.put(columnInfo.getFieldName(), null);
@@ -63,13 +88,14 @@ public class ModelHelper {
                     result.put(subTableName, subResults);
                     break;
                 default:
-                    throw new RuntimeException(format("未识别的聚合类型:%s", relationshipType));
+                    throw new ApiException(format("未识别的聚合类型:%s", relationshipType));
             }
         }
         try {
             return new ObjectMapper().writeValueAsString(result);
         } catch (JsonProcessingException e) {
-            return "";
+            e.printStackTrace();
+            throw new ApiException("json转换时出现异常");
         }
     }