package com.datastax.driver.core 不存在

Question

I'm begginner in cassandra, I'm trying to connect to cassandra database and insert some rows in netbeans but I have error under the import: package com.datastax.driver.core does not exist any solutions?

import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
import com.datastax.driver.core.Session;

public class CassandraConnection {
    public static void main(String args[])
    {
        System.out.println("Cassandra Java Connection");
        Cluster cluster;
        Session session;
        //Connect to the cluster and Keyspace ecommerce
        cluster=Cluster.builder().addContactPoint("localhost").build();
        session=cluster.connect("ecommerce");
        System.out.println("Inserting Data in Cassandra");
        session.execute("INSERT INTO products (pdt_id, cat_id, pdt_name, pdt_desc, price, shipping) VALUES (001,104, 'Danby 0.7 cu. ft. Microwave Oven', 'Capacity of 0.7 cu. ft.10 different power levels', 54.00, 'Expedited')");
        String pdtid = null, pdtname = null, pdtdesc = null;
        float price = 0;
        ResultSet resultset=session.execute("select * from products where pdt_id=005");
        for(Row row :resultset){
            pdtid = Integer.toString(row.getInt("pdt_id"));
            pdtname = row.getString("pdt_name");
            pdtdesc = row.getString("pdt_desc");
            price = row.getFloat("price");
            
            
        System.out.println("Product ID: " + pdtid);
        System.out.println("Name: " + pdtname);
        System.out.println("Description: " + pdtdesc);
        System.out.println("Price: "+ price);


        }
        cluster.close();
        }

}```

Answer 1

看起来您没有正确配置依赖项，因此找不到 Java 驱动程序 package。 正如 Andreas 还指出的那样，您似乎正在使用已在 Java 驱动程序 v4.x 中重构的旧代码。

由于您是 Cassandra 的新手，我建议您查看https://www.datastax.com/dev ，我们有免费的代码示例和使用 Katacoda 的交互式教程。

For example, learn CRUD operations on Cassandra with the Java driver in this hands-on tutorial which launches a Cassandra cluster + a dev environment where you can code -- all in a single browser window: https://www.datastax.com/开发/场景/datastax-java-driver-apache-cassandratm-quickstart 。 全部免费，无需登录。

You can also have a look at the code samples on Astra and learn how to develop apps using REST API, GraphQL API or Document API without any Cassandra knowledge. 干杯!

Answer 2

尝试将 maven 依赖项（或 jar 文件添加到您的项目中）

<!-- https://mvnrepository.com/artifact/com.datastax.cassandra/cassandra-driver-mapping -->
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-mapping</artifactId>
            <version>3.11.0</version>
        </dependency>