How To save DataFrame Into Cassandra table using Spark Java API - apache-spark

Question

I want to save data frame into cassandra table using sparkJava API
I want to add the part of saving in the following code
I want to save people dataframe into cassandra table and make queries on that cassandra table
import org.apache.spark.api.java.*;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.Function;
import org.apache.spark.sql.types.DataTypes;
import org.apache.spark.sql.types.StructType;
import org.apache.spark.sql.types.StructField;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.RowFactory;
import org.apache.spark.sql.SQLContext;
import com.datastax.spark.connector.cql.CassandraConnector;
import com.datastax.spark.connector.japi.CassandraRow;
import org.apache.spark.sql.SQLContext;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.sql.DataFrame;
public class SimpleApp {
public static void main(String[] args) {
SparkConf conf = new SparkConf().setAppName("Simple Application");
conf.setMaster("local");
conf.set("spark.cassandra.connection.host", "localhost");
JavaSparkContext sc = new JavaSparkContext(conf);
SQLContext sqlContext = new org.apache.spark.sql.SQLContext(sc);
DataFrame people = sqlContext.read().json("/root/people.json");
people.printSchema();
people.registerTempTable("people");
**//I want to save this TempTable or people dataframe into cassandra table and make teenagers SQL query on that cassandra table**
DataFrame teenagers = sqlContext.sql("SELECT name FROM people WHERE age >= 13 AND age <= 19");
teenagers.show();
}
}