Scala 中把 样例类转换成为JSON字符串

fastjson无法转换 case class 为json

<dependency>
    <groupId>org.json4s</groupId>
    <artifactId>json4s-native_2.11</artifactId>
    <version>3.5.4</version>
</dependency>

import org.json4s.native.Serialization
implicit val formats=org.json4s.DefaultFormats
val orderInfoJson: String = Serialization.write(orderInfo)