我有一个示例代码如下。
import play.api.libs.json._
import play.api.libs.functional.syntax._
import play.api.data.validation.ValidationError
import play.api.libs.json.Reads._
case class Retailer(firstName:String,lastName:String,email:String,mobileNo:String,password:String)
case class Business(name:String,preferredUrl:String,businessPhone:String,retailer:Retailer)
object JsonTest {
val jsonValue = """
{
"business":
{
"name":"Some Business Name",
"preferredUrl":"someurl",
"businessPhone":"somenumber",
"retailer":
{
"firstName":"Some",
"lastName":"One",
"email":"someone@somewhere.com",
"mobileNo":"someothernumber",
"password":"$^^HFKH*"
}
}
}
"""
def printJson ={
implicit val rltRds = (
(__ \ "firstName").read[String] ~
(__ \ "lastName").read[String] ~
(__ \ "email").read[String] ~
(__ \ "mobileNo").read[String] ~
(__ \ "password").read[String]
)(Retailer)
implicit val bsnsRds = (
(__ \ "name").read[String] ~
(__ \ "preferredUrl").read[String] ~
(__ \ "businessPhone").read[String] ~
(__ \ "retailer").read[Retailer](rltRds)
)(Business)
val buisness = Json.parse(jsonValue).validate[Business](bsnsRds)
val bus = new Business("Some Business","somebusinessurl","somenumber", new Retailer("Some","One","someone@somewhere.com","someothernumber","$^^HFKH*"))
//val json = Json.toJson(bus)
println(buisness)
}
def main(args: Array[String]): Unit = {
printJson
}
}
当我尝试将 json 解析为 Scala 对象（在本例中为业务类）时，出现 Json 验证错误。错误是
JsError(List((/retailer,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/preferredUrl,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/name,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/businessPhone,List(ValidationError(validate.error.missing-path,WrappedArray())))))
但是，如果我的 json 像
val jsonValue = """
{
"name":"Some Business Name",
"preferredUrl":"someurl",
"businessPhone":"somenumber",
"retailer":
{
"firstName":"Some",
"lastName":"One",
"email":"someone@somewhere.com",
"mobileNo":"someothernumber",
"password":"$^^HFKH*"
}
}
"""
请注意，外括号“{”和“business:”键已被删除。我得到了一个 JsSuccess。在第一种情况下，我如何为 Json 编写读取？另外，我怎样才能以通用的方式做到这一点？
请帮忙。