我有一个csv文件..我使用sql上下文将其加载到程序中，并将其上载到Dataframe中。现在我想将此csv文件存储到mongodbcollection中。但我无法将其转换为javapairedrdd。请帮助。。。
我的密码是。。。

import org.apache.hadoop.conf.Configuration;    
import org.apache.spark.SparkConf;    
import org.apache.spark.api.java.JavaPairRDD;    
import org.apache.spark.api.java.JavaRDD;    
import org.apache.spark.api.java.JavaSparkContext;    
import org.apache.spark.sql.DataFrame;    
import org.apache.spark.sql.Row;    
import org.apache.spark.sql.SQLContext;    
import org.apache.spark.sql.types.DataTypes;    
import org.apache.spark.sql.types.Metadata;    
import org.apache.spark.sql.types.StructField;    
import org.apache.spark.sql.types.StructType;    
import org.bson.BSONObject;    
import org.apache.spark.api.java.JavaPairRDD;    
import com.mongodb.hadoop.MongoOutputFormat;

public class CSVReader {

    public static void main(String args[]){

        SparkConf conf = new SparkConf().setAppName("sparkConnection").setMaster("local");

        JavaSparkContext sc = new JavaSparkContext(conf);

        SQLContext sqlContext = new SQLContext(sc);

        /* To load a csv file frol given location*/

        DataFrame df = sqlContext.read()

                .format("com.databricks.spark.csv")

                .option("inferSchema", "true")//Automaticaaly infers the data 

                .option("header", "true")//To include the headers in dataframe

                .load("D:/SparkFiles/abc.csv");

        }
}