使用Groovy JsonSlurper获取随机值

Question

我对Groovy很陌生，并试图了解处理这个问题的最佳方法。为一个基本问题道歉。

给定Json文件vehicles.json为：

{
  "prod": [
    {
      "id": "CAR LARGE",
      "vehicle": "102920",
      "name": "BMW 325"
    },
    {
      "id": "CAR MEDIUM",
      "vehicle": "192039",
      "name": "VOLVO V40"
    },
    {
      "id": "CAR SMALL",
      "vehicle": "29303",
      "name": "SMART 500"
    }
  ], 
  "preprod": [
   {///entries for this environment...

我想为给定的环境选择一辆随机的汽车，然后将它的vehicle和name属性提取到2的列表中供将来使用(实际上这个列表非常长)

这个方法将得到一个随机的车辆号码：

    def getVehicle() {
        def jsonSlurper = new JsonSlurper()
        def envVehiclesList = jsonSlurper.parseText(new File('src/main/resources/data/vehicles.json').text)

        List<String> vehicleList = new ArrayList<>();
        switch (System.getProperty("env")) {
            case "prod":
                vehicleList = (envVehiclesList.prod*.vehicle)
                break;
            case "preprod":
                vehicleList = (envVehiclesList.preprod*.vehicle)
                break;
            case "dev":
                vehicleList = (envVehiclesList.dev*.vehicle)
                break;
            default:
                vehicleList = "18292" as List<String>
        }

        def rand = new Random()
        def randomVehicle = vehicleList.get(rand.nextInt(vehicleList.size()))
        log.info("Random Base Vehicle: {}", randomVehicle)
        return randomVehicle
    }

这给了我一个随机的vehicle，例如192039。我需要能够提取与随机选择的name相关联的vehicle，并将其存储在列表或对象中，这样我就可以提取这两种方法，以便将来使用。例如，randomVehicle存储的是29303, SMART 500，如果存储在对象中，则可以通过索引从列表中获取或使用getter。

任何建议都有助于我的学习。谢谢。

Answer 1

def input = """
{
  "prod": [
    {
      "id": "CAR LARGE",
      "vehicle": "102920",
      "name": "BMW 325"
    },
    {
      "id": "CAR MEDIUM",
      "vehicle": "192039",
      "name": "VOLVO V40"
    },
    {
      "id": "CAR SMALL",
      "vehicle": "29303",
      "name": "SMART 500"
    }
  ]
}
"""

def jsonSlurper = new groovy.json.JsonSlurper()
def envVehiclesList = jsonSlurper.parseText(input)
def env = "prod"
def vehicleList = []
    
switch (env) {
    case "prod":
    vehicleList = (envVehiclesList.prod)
    break;
    case "preprod":
    vehicleList = (envVehiclesList.preprod)
    break;
    case "dev":
    vehicleList = (envVehiclesList.dev)
    break;
    default:
        throw new IllegalArgumentException("Unknown Environment: $env")
}

def rand = new Random()
def randomVehicle = vehicleList.get(rand.nextInt(vehicleList.size()))
println("Random Base Vehicle: $randomVehicle")

只要不选择.vehicle，那么您就有了所有的数据。在Groovy Web控制台中尝试一下