在java中，使用withColumn在映射中查找字段值将列添加到数据帧中

import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
import import static org.apache.spark.sql.functions.*;

SparkSession spark = SparkSession.builder()
        .appName("Java withColumn Example")
        .master("local")
        .getOrCreate();

Dataset<Row> df = spark.read().format("csv")
        .option("header", "true")
        .load("path/to/input.csv");

Dataset<Row> newDf = df.withColumn("newColumn", col("existingColumn").plus(1));

newDf.show();