如何通过OrientDB中的Graph API向Vertex类添加属性？

import com.orientechnologies.orient.core.db.ODatabaseSession;
import com.orientechnologies.orient.core.db.OrientDB;
import com.orientechnologies.orient.core.record.OVertex;
import com.orientechnologies.orient.core.sql.executor.OResultSet;
import com.orientechnologies.orient.core.sql.executor.OVertexResultSet;

public class OrientDBExample {
    public static void main(String[] args) {
        // 连接到OrientDB数据库
        OrientDB orientDB = new OrientDB("remote:localhost", OrientDBConfig.defaultConfig());
        ODatabaseSession db = orientDB.open("your_database", "your_username", "your_password");

        // 获取OrientGraph对象
        OrientGraph graph = new OrientGraph(db);

        try {
            // 创建一个新的顶点对象
            OVertex vertex = graph.addVertex("class:Vertex");

            // 向顶点添加属性
            vertex.setProperty("name", "John");

            // 提交更改
            graph.commit();
        } finally {
            // 关闭数据库连接
            graph.close();
            orientDB.close();
        }
    }
}