java控制neo4j

要在Java中控制Neo4j数据库，你需要使用Neo4j提供的Java API。这个API允许你编写Java代码来连接到Neo4j数据库并执行各种数据库操作，如创建节点，添加关系，查询数据等。以下是使用Neo4j Java API执行一些基本操作的示例代码：

1. 连接到Neo4j数据库

GraphDatabaseFactory dbFactory = new GraphDatabaseFactory();
GraphDatabaseService dbService = dbFactory.newEmbeddedDatabase(new File("path/to/neo4j/db"));

2. 创建一个节点

try (Transaction tx = dbService.beginTx()) {
    Node node = dbService.createNode();
    node.setProperty("name", "John");
    tx.success();
}

3. 添加关系

try (Transaction tx = dbService.beginTx()) {
    Node john = dbService.findNode(Label.label("Person"), "name", "John");
    Node jane = dbService.findNode(Label.label("Person"), "name", "Jane");
    john.createRelationshipTo(jane, RelationshipType.withName("FRIENDS"));
    tx.success();
}

4. 执行查询

try (Transaction tx = dbService.beginTx()) {
    Node john = dbService.findNode(Label.label("Person"), "name", "John");
    for (Relationship relationship : john.getRelationships(Direction.OUTGOING, RelationshipType.withName("FRIENDS"))) {
        Node friend = relationship.getEndNode();
        System.out.println(friend.getProperty("name"));
    }
    tx.success();
}

以上代码只是Neo4j Java API的一部分，你可以在Neo4j官方文档中查找更多信息和示例。