scala遍歷JSONObject的每一個key

import com.alibaba.fastjson.{JSON, JSONObject}
import scala.collection.JavaConversions._

val jsonStr = """{"a": 1, "b": 2, "c": 3}"""
val jsonObj = JSON.parseObject(jsonStr)
for (entry <- jsonObj.entrySet) {
    println(entry.getKey + ":" + entry.getValue)
}