1，获取下一层节点时 添加个数限制。

src/main/java/com/keymobile/metadata/metadataRelation/controller/MetaDataController.java

@@ -258,14 +258,15 @@ public class MetaDataController {
         List<MetaData> metaDataList = new ArrayList<>();
         Map<String, MetaModel> metaModelMap = new HashMap<>();
         ReturnReslult result = new ReturnReslult();
+        Integer count = Integer.valueOf(layer);
         //如果是系统，就用名称去查询，如果是其他类型，就用id去查询
         if (dataId.startsWith("catalog=")) {
             String[] dataIds = dataId.split("=");
             String dataName = dataIds[1];
-            metaDataList = metadataService.findChildrenByParentName(dataName);
+            metaDataList = metadataService.findChildrenByParentName(dataName,count);
         } else {
 
-            metaDataList = metadataService.findChildrenByParentId(dataId);
+            metaDataList = metadataService.findChildrenByParentId(dataId,count);
         }
         for (MetaData metaData : metaDataList) {
             Node node = new Node();

src/main/java/com/keymobile/metadata/metadataRelation/respository/MetadataRepository.java

@@ -32,9 +32,9 @@ public interface MetadataRepository extends Neo4jRepository<MetaData, Long> {
     List<MetaData> findMetaData(@Param("dataName") String dataName, @Param("n") int n);
 
 
-    @Query("match (data:MetaData{system:{parentName}}) return data")
-    List<MetaData> findMetaDataByParentName(@Param("parentName") String parentName);
+    @Query("match (data:MetaData{system:{parentName}}) return data limit {limit} ")
+    List<MetaData> findMetaDataByParentName(@Param("parentName") String parentName, @Param("limit")  Integer count );
 
-    @Query("MATCH p=(n:MetaData {metadataId:{parentId}})-[r:Composition]->(m) RETURN m")
-    List<MetaData> findMetaDataByParentId(@Param("parentId") String parentId);
+    @Query("MATCH p=(n:MetaData {metadataId:{parentId}})-[r:Composition]->(m) RETURN m limit {limit} ")
+    List<MetaData> findMetaDataByParentId(@Param("parentId") String parentId, @Param("limit") Integer count );
 }

src/main/java/com/keymobile/metadata/metadataRelation/service/IMetadataService.java

@@ -17,9 +17,9 @@ public interface IMetadataService {
 
     ReturnReslult getSystemGraph();
 
-    List<MetaData> findChildrenByParentId(String parentId);
+    List<MetaData> findChildrenByParentId(String parentId,Integer count);
 
-    List<MetaData> findChildrenByParentName(String parentName);
+    List<MetaData> findChildrenByParentName(String parentName,Integer count);
 
     List<MetaData> finAllMetaData();
 

src/main/java/com/keymobile/metadata/metadataRelation/service/impl/MetadataServiceImpl.java

@@ -478,14 +478,14 @@ public class MetadataServiceImpl implements IMetadataService {
     }
 
     @Override
-    public List<MetaData> findChildrenByParentId(String parentId) {
+    public List<MetaData> findChildrenByParentId(String parentId,Integer count) {
 
-        return metadataRepository.findMetaDataByParentId(parentId);
+        return metadataRepository.findMetaDataByParentId(parentId ,count);
     }
 
     @Override
-    public List<MetaData> findChildrenByParentName(String parentName) {
-        return metadataRepository.findMetaDataByParentName(parentName);
+    public List<MetaData> findChildrenByParentName(String parentName,Integer count) {
+        return metadataRepository.findMetaDataByParentName(parentName,count );
     }
 
     @Override