scala json4s删除json里面的key

如题，采用json4s，scala删除json里面的key？

比如有这么一段json：{\”@type\”:{\”version\”:\”1.0.2\”,\”name\”:\”application-content\”,\”data\”:[]},\”key-to-remove\”:[{\”blah\”:\”more blah\”}],\”@value\”:[]}，要删除key-to-remove这个key，采用removeField即可。上代码：

package dev.jsonimport org.json4s.DefaultFormatsimport org.json4s.JsonDSL._import org.json4s.jackson.JsonMethods._object Course2 {implicit val formats = DefaultFormatsdef main(args: Array[String]): Unit = {val key = \"key-to-remove\"val s =\"\"\"|{\"@type\":{\"version\":\"1.0.2\",\"name\":\"application-content\",\"data\":[]},\"key-to-remove\":[{\"blah\":\"more blah\"}],\"@value\":[]}|\"\"\".stripMarginval obj = parse(s)if (null != obj) {val obj2 = obj.removeField(_._1.equals(key))val out = compact(render(obj2))println(out)}}}