手动创建 JSON

你可以手动构建 JSON 对象树（JsValue）

import play.api.libs.json._

val json = JsObject(Map(
  "name" -> JsString("Jsony McJsonface"),
  "age" -> JsNumber(18),
  "hobbies" -> JsArray(Seq(
    JsString("Fishing"),
    JsString("Hunting"),
    JsString("Camping")
  ))
))

或者使用较短的等效语法，基于一些隐式转换：

import play.api.libs.json._

val json = Json.obj(
  "name" -> "Jsony McJsonface",
  "age" -> 18,
  "hobbies" -> Seq(
    "Fishing",
    "Hunting",
    "Camping"
  )
)

要获取 JSON 字符串：

json.toString
// {"name":"Jsony McJsonface","age":18,"hobbies":["Fishing","Hunting","Camping"]}
Json.prettyPrint(json)  
//  {
//    "name" : "Jsony McJsonface",
//    "age" : 18,
//    "hobbies" : [ "Fishing", "Hunting", "Camping" ]
//  }