如何在finatra中使用camelCase设置响应

Question

我需要用finatra在camelCase中返回一个json响应，但默认情况下它是在snake_case中。到目前为止，我发现我需要使用ObjectMapper，但是我不能理解一旦我创建了它，我应该把它传递到哪里。举个例子会很有帮助。这就是我所拥有的：

import com.twitter.finagle.http.Request
import com.twitter.finatra.http.Controller

class myTargetingController extends Controller {
    val endpoint = "http://....."

    get(s"$endpoint/?") { request: Request =>
        // what do I do with it?
        // val objectMapper = ScalaObjectMapper.builder.camelCaseObjectMapper 
        response.ok.json(myObject)
    }
}

=

import com.twitter.finagle.{Service, SimpleFilter}
import com.twitter.finagle.http.{ Request, Response}
import com.twitter.finatra.http.routing.HttpRouter
import com.twitter.finatra.http.{HttpServer}
import com.twitter.finatra.http.filters.CommonFilters
import com.twitter.util.Future

object MyServerApp extends MyServer

class MyServer extends HttpServer {
override protected def configureHttp(router: HttpRouter) {
    router
        .filter[CommonFilters]
        .add[CorsFilter, MyController]
    }
}

附言:我对Scala非常非常陌生

Answer 1

从评论中跟进

定义自定义ObjectMapperModule

class CamelCaseModule extends ScalaObjectMapperModule {

    override val propertyNamingStrategy: PropertyNamingStrategy =
      new PropertyNamingStrategy.UpperCamelCaseStrategy

    override def additionalMapperConfiguration(mapper: ObjectMapper): Unit = {
      mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true)
 }
}

覆盖服务器的默认Jackson模块

override def jacksonModule = new CamelCaseModule

确保你有

"com.twitter" %% "finatra-jackson" % yourFinatraVersion % "test"

在你的build.sbt中

以及您导入的

import com.fasterxml.jackson.databind.{DeserializationFeature, Module, ObjectMapper, PropertyNamingStrategy}
import com.twitter.finatra.jackson.modules.ScalaObjectMapperModule

在本地进行了测试，看起来很有效希望这能有所帮助