使用body作为参数Kotlin的Retrofit2 POST请求

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

data class User(
    val name: String,
    val email: String,
    val age: Int
)

import retrofit2.Call
import retrofit2.http.Body
import retrofit2.http.POST

interface ApiService {
    @POST("users/create")
    fun createUser(@Body user: User): Call<UserResponse>
}

import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory

object RetrofitClient {
    private const val BASE_URL = "https://yourapi.com/api/"

    val instance: ApiService by lazy {
        Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(ApiService::class.java)
    }
}

val user = User(name = "John Doe", email = "john@example.com", age = 30)

RetrofitClient.instance.createUser(user).enqueue(object : Callback<UserResponse> {
    override fun onResponse(call: Call<UserResponse>, response: Response<UserResponse>) {
        if (response.isSuccessful) {
            println("Response: ${response.body()}")
        } else {
            println("Error: ${response.errorBody()?.string()}")
        }
    }

    override fun onFailure(call: Call<UserResponse>, t: Throwable) {
        println("Failure: ${t.message}")
    }
})