neo4j:在neo4j graphDB中为节点和RelationshipTypes添加多个属性

Question

我想在neo4j(java)中根据Facebook数据构建社交网络图.我正在尝试搜索相关的示例来理解这些概念,但仍然无法获得任何这些特定类型.请帮助我知道如何实现它,如果可能的话,提供适当的链接,我可以获得相关的帮助.

我想拥有节点和关系(边缘)属性,如下所示:

Node properties:
   String id, name, town;
   int numOfFriends;
   Double age;
   Date dateOfJoining
   HashSet<String> postIdSet;

Relationship Properties:
   boolean Knows;
   int numOfLikes, numOfComments;
   float wtLikes, wtComments;
   String relationship;

如何创建graphDB具有上述属性的节点和边？

我有一个示例代码结构,用于创建graphDB和添加节点和关系,如下所示:

GraphDatabaseService graphDB = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH);
registerShutdownHook(graphDB);

Transaction tx = graphDB.beginTx();
try {
    /* define relationshipType*/
    RelationshipType rel = DynamicRelationshipType.withName(??);

    /* create new node with given properties*/
    Node node1 = graphDB.createNode();

    /* set node1 properties e.g. node1.id="1234" */

    /* create another new node with given properties */
    Node node2 = graphDB.createNode();

    /* set node2 properties e.g. node1.id="5678" */

    /* search for node with id "1234" */
    Node n1 = getNodeById(graphDB,"1234");

    /* search for node with id "5678" */
    Node n2 = getNodeById(graphDB,"5678");

    /* create relationship between n1 and n2 with above mentioned properties and set their values */
    Relationship relationship = n1.createRelationshipTo(n2, rel);
    relationship.setProperty(??);
    tx.success();
} finally {
    tx.finish();
}

如何将这些不同的属性添加到节点或边缘(关系)？

如何搜索具有给定String "id"属性的节点并更新其他属性,例如numOfFriends？

如果有人试图填充/提供所有/任何查询的示例解决方案代码,那将是最有用的:(1)添加给定的节点属性集,(2)添加给定的边缘属性集,(3)搜索对于节点和其他任何附加..这可以作为访问这个问题的任何人的快速参考..谢谢.

Answer 1

只需使用node.setProperty或relationship.setProperty设置属性即可

搜索:您可以使用Cypher执行查询以获取节点,属性和关系,或者使用索引查找节点然后执行node.getProperty.

全部在手册中:http://docs.neo4j.org/chunked/stable/tutorials-java-embedded.html (假设您根据代码使用嵌入式)

BTW:完成节点/ rel操作后需要调用tx.success().