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我想创建一个函数来分析我的记录,我得到两个不同的行为时,我调用一个函数VS硬编码是:斯卡拉解析JSON在功能表现不同
我使用:
import org.json4s.JsonAST.{JString, JField, JObject, JArray}
import org.json4s.jackson.JsonMethods._
val parsed = parse("""{"timestamp":"2016-06-02 13:40:16,772","tableName":"stg_mde_campaign_master","dbName":"stg_bankrtl_mde","owner":"hive","location":"null"}""")
val output = for {
JObject(child) <- parsed
JField("timestamp", JString(subject1)) <- child
JField("tableName", JString(obj1)) <- child
} yield (subject1,obj1)
将输出(我想要什么):
output: List[(String, String)] = List((2016-06-02 13:40:16,772,stg_mde_campaign_master)
,但是当我把它转移到一个功能我得到:
def getSubOb(record: String, subject:String, obj:String): List[(String, String)] = {
val parsed = parse(record)
val output: List[(String, String)] = for {
JObject(child) <- parsed
JField(subject, JString(subject1)) <- child
JField(obj, JString(obj1)) <- child
} yield (subject1, obj1)
output
}
val something = getSubOb("""{"timestamp":"2016-06-02 13:40:16,772","tableName":"stg_mde_campaign_master","dbName":"stg_bankrtl_mde","owner":"hive","location":"null"}""", "timestamp", "tableName")
输出行为很怪:
something: List[(String, String)] = List((2016-06-02 13:40:16,772,2016-06-02 13:40:16,772), (2016-06-02 13:40:16,772,stg_mde_campaign_master), (2016-06-02 13:40:16,772,stg_bankrtl_mde), (2016-06-02 13:40:16,772,hive), (2016-06-02 13:40:16,772,null), (stg_mde_campaign_master,2016-06-02 13:40:16,772), (stg_mde_campaign_master,stg_mde_campaign_master), (stg_mde_campaign_master,stg_bankrtl_mde), (stg_mde_campaign_master,hive), (stg_mde_campaign_master,null), (stg_bankrtl_mde,2016-06-02 13:40:16,772), (stg_bankrtl_mde,stg_mde_campaign_master), (stg_bankrtl_mde,stg_bankrtl_mde), (stg_bankrtl_mde,hive), (stg_bankrtl_mde,null), (hive,2016-06-02 13:40:16,772), (hive,stg_mde_campaign_master), (hive,stg_bankrtl_mde), (hive,hive), (hive,null), (null,2016-06-02 13:40:16,772), (null,stg_mde_campaign_...
张贴一些可运行的代码。 – Falmarri
添加了导入语句,但其他所有内容都可以运行 – theMadKing