The case class reports an error when running in the notebook

[齐木木]

As shown in the figure, the case class and the json string are converted through fasterxml.jackson, but an unexpected error occurred during the running of the code. I think this problem may be related to the loading principle of the notebook. Because of the same code, I get the correct result when I run it on my local computer

[齐木木 · Accepted solution]

code：

var str="{\"app_type\":\"installed-app\"}"
    import com.fasterxml.jackson.databind.ObjectMapper
    import com.fasterxml.jackson.module.scala.DefaultScalaModule
    val mapper = new ObjectMapper()
    mapper.registerModule(DefaultScalaModule)
    val rmodel=mapper.readValue(str, classOf[appDeeplink])
    println(rmodel)

import com.fasterxml.jackson.annotation._
 
 
@JsonIgnoreProperties(ignoreUnknown = true)
case class appDeeplink(
                        @JsonProperty("app_type") app_type: String
                      )