Issue parsing JSON with Lift JSON

Question

I am trying to parse JSON using the Lift JSON library. I have imported the library using SBT by adding the following statement to my build.sbt file:

libraryDependencies +="net.liftweb" % "lift-json" % "2.0"

I start SBT and run the Scala interpreter using the "console" command.

I then run the following two statements:

import net.liftweb.json._
parse(""" { "numbers" : [1, 2, 3, 4] } """)

After the second statement I get the following error:

<console>:11: error: not found: value parse
       parse(""" { "numbers" : [1, 2, 3, 4] } """)

To make sure it is not a problem with my project I have started a clean project and only imported the Lift JSON library. With the same result. I have even tried an alternative JSON library (json4s), but it gives exactly the same problem when it gets to the parse statement :-(

I am running the following versions: Scala 2.11.2 SBT 0.13.6 Lift JSON 2.0

Any suggestions?

score 2 · Answer 1 · answered Oct 10 '14 at 16:14

2

Lift 2.0 is pretty old. Just use 2.5 instead. Afaict 2.0 doesn't actually have a parse method in the json package object.

answered Oct 10 '14 at 16:14

Dylan

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Since you're using Scala 2.11, you'll want Lift 3.0-M2. – joescii Oct 10 '14 at 20:01
1

2.6 is also just fine. – Erik Kaplun Oct 11 '14 at 07:43

score 1 · Answer 2 · edited Nov 01 '17 at 22:20

From the 'scala repl' with scala version 2.11.6 and one of the later versions of lift-json (http://mvnrepository.com/artifact/net.liftweb/lift-json_2.11)

Running the example from the lift-json README.md file https://github.com/lift/lift/tree/master/framework/lift-base/lift-json/

You can also add the paranamer.jar file to classpath using the ":require" (shown below) as suggested in the lift-json README.md

$ scala

Welcome to Scala version 2.11.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_45).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :require lift-json_2.11-3.0-M5-1.jar

Added '<absolute path to>/lift-json/lift-json_2.11-3.0-M5-1.jar' to classpath.

scala> import net.liftweb.json._

import net.liftweb.json._

scala> parse(""" { "numbers" : [1, 2, 3, 4] } """)

res0: net.liftweb.json.JValue = JObject(List(JField(numbers,JArray(List(JInt(1), JInt(2), JInt(3), JInt(4))))))

Issue parsing JSON with Lift JSON

2 Answers2