lift_parse_json_i.scala

val json = net.liftweb.json.JsonParser.parse("[{\"foo\":1,\"bar\":2},{\"foo\":3,\"bar\":4}]")
implicit val formats = net.liftweb.json.DefaultFormats
case class Info(foo:Int,bar:Int)
val m = json.extract[List[Info]]
m.foreach{x=> println(x.foo+"|"+x.bar)}

lift_parse_json_ii.scala

import net.liftweb.json._
import net.liftweb.json.JsonAST.JObject
import net.liftweb.json.JsonDSL._
implicit val formats = DefaultFormats.lossless
val json = JsonParser.parse("""
{
"name": "joe",
"children":[
    {
        "name": "Mary",
        "age": 5
    },
    {
        "name": "Mazy",
        "age": 3
    }
]
}
""").asInstanceOf[JObject]