首先在你的pom中添加如下依赖

<dependency>
  <groupId>com.oracle</groupId>
  <artifactId>ojdbc6</artifactId>
  <version>11.2.0.3</version>
</dependency>

之后准备sparksql容器对象

val spark = SparkSession
      .builder()
      .master("local[*]")
      .appName("ReadOracle")
      .config("spark.driver.cores","1")
      .getOrCreate()

拉取是调用read方法

val oracleDF = spark.read
      .format("jdbc")
      .option("url","jdbc:oracle:thin:@192.168.65.123:1521:数据库名字")
      .option("dbtable", "ds.task_db")
      .option("user", "root")
      .option("password", "root")
      .option("driver", "oracle.jdbc.driver.OracleDriver")
      .load();

注意在拉取之后如果使用DF时报错无法装换DataSet，那就手动导入如下类

import org.apache.spark.sql.Dataset
或者全导进来
import org.apache.spark.sql._