普元 EOS Platform 7.6 Json和实体对象互相转换方案

转至元数据起始

【解答】 

Demo源码，点击下载，执行建表语句后，插入数据，访问testJDconvert逻辑流可以看到效果

环境：EOS Platform 7.6 开发版+Oracle 10g数据库

转换用的主要代码：

//Json串转实体数组

public static DataObject[] convertJsonStringToDataObjects(

   String entityName, String jsonString) throws JSONException {

  ArrayList<DataObject> result = new ArrayList<DataObject>();

  JSONArray jsonArr = new JSONArray(jsonString);

  for (int i = 0; i < jsonArr.length(); i++) {

   JSONObject json = jsonArr.getJSONObject(i);

   DataObject dataObject = DataObjectUtil.createDataObject(entityName);

   List list = dataObject.getInstanceProperties();

   for (Object object : list) {

    Property key = (Property) object;

    String keyType = key.getType().getName();//获取字段类型

    if (json.has(key.getName())) {

     Object value = json.get(key.getName());

     if (value == JSONObject.NULL)

      continue;

     dataObject.set(key, value);

     dataObject = converType(keyType, key, dataObject, value);

    }

   }

   result.add(dataObject);

  }

  return result.toArray(new DataObject[result.size()]);

 }

//json串转实体对象

public static DataObject convertJsonStringToDataObject(String entityName,

   String jsonString) throws JSONException {

  JSONObject json = new JSONObject(jsonString);

  DataObject dataObject = DataObjectUtil.createDataObject(entityName);

  List list = dataObject.getInstanceProperties();

  for (Object object : list) {

   Property key = (Property) object;

   String keyType = key.getType().getName();//获取字段类型

   if (json.has(key.getName())) {

    Object value = json.get(key.getName());

    if (value == JSONObject.NULL)

     continue;

    dataObject = converType(keyType, key, dataObject, value);//根据不同类型设置值

   } else {

   }

  }

  return dataObject;

 }

//实体转json串

public static String convertDataObjectToJsonString(DataObject dataObject) {

  DataObject[] dataObjects = new DataObject[] { dataObject };

  String jsonString = convertDataObjectsToJsonString(dataObjects);

  jsonString = jsonString.substring(1, jsonString.length() - 1);

  return jsonStri
a854
ng;

 }

//实体数组转json串

public static String convertDataObjectsToJsonString(DataObject[] dataObjects) {

  Map<String, DataObject[]> root = new HashMap<String, DataObject[]>();

  root.put("data", dataObjects);

  StringWriter stringWriter = new StringWriter();

  JSONWriter jsonWriter = new JSONWriter(stringWriter);

  try {

   ExtendedXMLSerializer serializer = new ExtendedXMLSerializer();

   SerializeOption operation = new SerializeOption();

   operation.setCreateOuterCollectionNode(true);

   serializer.setOption(operation);

   IMarshallingNode node = serializer.marshallToNode(root, "root");

   jsonWriter.object();

   List<IMarshallingNode> children = node.getChildren();

   for (IMarshallingNode child : children) {

    write(child, jsonWriter);

   }

   jsonWriter.endObject();

  } catch (Exception e) {

   e.printStackTrace();

   throw new RuntimeException(e.getMessage());

  }

  String jsonString = stringWriter.toString();

  jsonString = jsonString.substring(8, jsonString.length() - 1);

  return jsonString;

 }