scala的json项目

发布时间 2023-03-26 23:15:08作者: 欧阳维斯诺夫斯基

有下面的scala代码

package jobs

import org.json4s._
import org.json4s.jackson.JsonMethods._

object Test {

  def main(args: Array[String]): Unit = {
    case class Person(name: String, age: Int, city: String)

    // Parse JSON string to a Person object
    val jsonStr = """{"name":"John Smith", "age":30, "city":"New York"}"""
    implicit val formats = DefaultFormats
    val person = parse(jsonStr).extract[Person]

    print(person.age)

  }
}

需要在pom里面加入

    <dependency>
      <groupId>org.json4s</groupId>
      <artifactId>json4s-jackson_2.11</artifactId>
      <version>3.5.3</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>org.json4s</groupId>
      <artifactId>json4s-core_2.11</artifactId>
      <version>3.5.3</version>
      <scope>compile</scope>
    </dependency>

然后用 java -cp target/cgame-emotion-1.0.0-jar-with-dependencies.jar jobs.Test 才能跑成功。用下面的两个方式跑都失败:

java -cp ~/.m2/repository/\*:target/cgame-emotion-1.0.0.jar jobs.Test 


export CLASSPATH=~/./m2/repository/* 
java -cp target/cgame-emotion-1.0.0.jar jobs.Test

其中第二个方式里面,无论是细化到org.json4s还是更深入都会失败