关于scala的main方法传参和使用的方法

def main(args: Array[String]): Unit = {
  val spark = SparkSession
    .builder()
    //.master("local")
    .appName("name")
    .config("hive.metastore.uris", "****")
    .enableHiveSupport()
    .getOrCreate()
//默认值设置，如果是int就改为int和0
  var user:String = ""
  var password:String = ""
  var url:String = ""

  var hive_table_0:String= ""
  var mysql_table_1:String = ""

//参数顺序从0至4依次排序的五个参数，这样写工具类大大提高了可用性

user = args(0)
password = args(1)
url = args(2)

hive_table_0 = args(3)
mysql_table_1 = args(4)

}

/*

提交命令

spark2-submit --class Zk.xxx\
--master yarn \
--deploy-mode client \
--driver-memory 2G \
--num-executors 3 \
--executor-cores 1 \
--executor-memory 5G \
/opt/zk/xx/xxx.jar \
"参数0" \
"参数1" \
"参数2" \
"参数3" \
"参数4"

*/