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| import org.json4s._ | |
| import org.json4s.jackson.JsonMethods._ | |
| object ScalaJson { | |
| def main(args: Array[String]): Unit = { | |
| implicit val formats = DefaultFormats | |
| case class Model(hello: String, age: Int) | |
| val rawJson = """{"hello": "world", "age": 42}""" | |
| val m1 = parse(rawJson).extract[Model] | |
| println(m1) | |
| println(m1.hello) | |
| } | |
| } |
scala> import org.json4s._
scala> import org.json4s.jackson.JsonMethods._
scala> implicit val formats: Formats = DefaultFormats // Brings in default date formats etc.
scala> case class Child(name: String, age: Int, birthdate: Option[java.util.Date])
scala> case class Address(street: String, city: String)
scala> case class Person(name: String, address: Address, children: List[Child])
scala> val json = parse("""
{ "name": "joe",
"address": {
"street": "Bulevard",
"city": "Helsinki"
},
"children": [
{
"name": "Mary",
"age": 5,
"birthdate": "2004-09-04T18:06:22Z"
},
{
"name": "Mazy",
"age": 3
}
]
}
""")
scala> json.extract[Person]
res0: Person = Person(joe,Address(Bulevard,Helsinki),List(Child(Mary,5,Some(Sat Sep 04 18:06:22 EEST 2004)), Child(Mazy,3,None)))
scala> val addressJson = json \ "address" // Extract address object
scala> addressJson.extract[Address]
res1: Address = Address(Bulevard,Helsinki)
scala> (json \ "children").extract[List[Child]] // Extract list of objects
res2: List[Child] = List(Child(Mary,5,Some(Sat Sep 04 23:36:22 IST 2004)), Child(Mazy,3,None))
`scala> import org.json4s._
scala> import org.json4s.jackson.JsonMethods._
scala> implicit val formats: Formats = DefaultFormats // Brings in default date formats etc.
scala> case class Child(name: String, age: Int, birthdate: Option[java.util.Date])
scala> case class Address(street: String, city: String)
scala> case class Person(name: String, address: Address, children: List[Child])
scala> val json = parse("""
{ "name": "joe",
"address": {
"street": "Bulevard",
"city": "Helsinki"
},
"children": [
{
"name": "Mary",
"age": 5,
"birthdate": "2004-09-04T18:06:22Z"
},
{
"name": "Mazy",
"age": 3
}
]
}
""")
scala> json.extract[Person]
res0: Person = Person(joe,Address(Bulevard,Helsinki),List(Child(Mary,5,Some(Sat Sep 04 18:06:22 EEST 2004)), Child(Mazy,3,None)))
scala> val addressJson = json \ "address" // Extract address object
scala> addressJson.extract[Address]
res1: Address = Address(Bulevard,Helsinki)
scala> (json \ "children").extract[List[Child]] // Extract list of objects
res2: List[Child] = List(Child(Mary,5,Some(Sat Sep 04 23:36:22 IST 2004)), Child(Mazy,3,None))`
https://manuel.bernhardt.io/2015/11/06/a-quick-tour-of-json-libraries-in-scala/
https://github.com/json4s/json4s