Kotlin Gson解析泛型对象

API：API说明文档：www.juhe.cn/docs/api/id…
接口地址：v.juhe.cn/wepiao/quer…
API返回的json：

{"reason":"请求成功","result":{"h5url":"http:\/\/v.juhe.cn\/wepiao\/go?key=xxxxxxxxx","h5weixin":"http:\/\/v.juhe.cn\/wepiao\/go?key=xxxxxxxxxx&s=weixin"},"error_code":0}

{
    "reason": "请求成功",
    "result": {
        "h5url": "http://v.juhe.cn/wepiao/go?key=xxxxxxxxxxxxx",
        "h5weixin": "http://v.juhe.cn/wepiao/go?key=xxxxxxxxxx&s=weixin"
    },
    "error_code": 0
}

实体类

• H5TicketUrl

  data class H5TicketUrl(val h5url: String, val h5weixin: String)

• H5TicketResult

  data class H5TicketResult(val error_code: Int, val reason: String, val result: H5TicketUrl)

• ProjectBaseResult

  data class ProjectBaseResult<out M>(val reason: String, val error_code: Int, val result: M)

  请求

  val url = freeApi.reqUrl + "?key=" + APP_KEY // 请求url
  val resultJson = URL(url).readText()  // 发送请求，resultJson为返回的json

  解析Json-method 1

  val result = Gson().fromJson<H5TicketResult>(resultJson, H5TicketResult::class.java)

  解析Json-method 2

  val type = object : TypeToken<ProjectBaseResult<H5TicketUrl>>() {}.type
  val result = Gson().fromJson<ProjectBaseResult<H5TicketUrl>>(resultJson, type)

  解析Json-method 3

  val result = object : BaseResult<H5TicketUrl>() {}.fromJson(resultJson)

abstract class BaseResult<out M> : ParameterizedType {

    override fun getRawType(): Type {
        return ProjectBaseResult::class.java
    }

    override fun getOwnerType(): Type? {
        return null
    }

    override fun getActualTypeArguments(): Array<Type> {
        val superclass = this.javaClass.genericSuperclass
        if (superclass is Class<*>) {
            throw RuntimeException("Missing type parameter.")
        }
        return (superclass as ParameterizedType).actualTypeArguments
    }

    fun fromJson(json: String): ProjectBaseResult<M> {
        return Gson().fromJson<ProjectBaseResult<M>>(json, this)
    }

}