如何使用Kotlin中的Retrofit访问Json中的嵌套或子数组

implementation 'com.squareup.retrofit2:retrofit:2.x.x'
implementation 'com.squareup.retrofit2:converter-gson:2.x.x'

{
  "name": "John",
  "age": 25,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "hobbies": ["reading", "swimming", "traveling"]
}

data class User(
    val name: String,
    val age: Int,
    val address: Address,
    val hobbies: List<String>
)

data class Address(
    val street: String,
    val city: String
)

interface ApiService {
    @GET("user")
    suspend fun getUser(): User
}

val retrofit = Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .build()

val apiService = retrofit.create(ApiService::class.java)

viewModelScope.launch {
    try {
        val user = apiService.getUser()
        // 处理返回的用户数据
    } catch (e: Exception) {
        // 处理异常
    }
}