Question

我正在尝试这里的spark-cassandra-connector-japi示例：

https://github.com/datastax/spark-cassandra-connector/blob/master/doc/7_java_api.md

maven构建失败，出现以下错误：

SimpleApp.java：[24,9]找不到符号[ERROR]符号：class CassandraRow [ERROR]位置：类SimpleApp

我的pom.xml如下所示

<project>
  <groupId>com.example</groupId>
  <artifactId>simple-project</artifactId>
  <modelVersion>4.0.0</modelVersion>
  <name>Simple Project</name>
  <packaging>jar</packaging>
  <version>1.0</version>
  <dependencies>
    <dependency> <!-- Spark dependency -->
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-core_2.10</artifactId>
      <version>1.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.datastax.spark</groupId>
        <artifactId>spark-cassandra-connector_2.10</artifactId>
        <version>1.5.0-M3</version>
    </dependency>
    <dependency>
        <groupId>com.datastax.spark</groupId>
        <artifactId>spark-cassandra-connector-java_2.10</artifactId>
        <version>1.5.0-M3</version>
    </dependency>
    <dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-core</artifactId>
        <version>2.1.9</version>
    </dependency>
    <dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-mapping</artifactId>
        <version>2.1.9</version>
    </dependency>
  </dependencies>
</project>

CassandraRow定义的类在哪里？我已经浏览了com.datastax.spark.connector.japi.CassandraJavaUtil包中的代码，并且没有在那里定义它。该示例要求仅静态导入com.datastax.spark.connector.japi以使示例正常工作。

任何指针都会非常感激。

Answer 1

你可以通过import com.datastax.spark.connector.CassandraRow;

让它发挥作用

我使用的是与您相同的依赖项（无论版本如何）

<dependency>
  <groupId>com.datastax.spark</groupId>
  <artifactId>spark-cassandra-connector-java_2.10</artifactId>
  <version>1.5.0-M2</version>
</dependency>

Spark cassandra连接器Java API，找不到符号CassandraRow

1 个答案: