如何在Playframework-2.5.x的akka​​ actor中使用/注入WSClient？

Question

我必须按需输入API。
为此，我有
1.创建一个演员，调度程序
2.在模块
中绑定actor和Scheduler 3.在application.conf文件

中启用了该模块

调度工作正常，但是现在我想将WSClient注入Actor，使用ws发送请求，将响应记录到数据库中。
在将WSClient注入Actor时出现问题。 {3}}

我所做的是：-

package controllers;

import akka.actor.UntypedActor;
import play.Logger;
import javax.inject.Inject;

import play.mvc.*;
import play.libs.ws.*;
import java.util.concurrent.CompletionStage;

public class CronActor extends UntypedActor{

    @Override
    public void onReceive(final Object message) throws Throwable {
        Logger.info("Write your crone task or simply call your method here that perform your task"+message);

        @Inject WSClient ws;

        WSRequest request = ws.url("https://api.exchangeratesapi.io/latest?base=USD&symbols=SGD,INR");

        WSRequest complexRequest = request.setHeader("Accept", "Application/json");
        CompletionStage<WSResponse> responsePromise = complexRequest.get();
        //WSRequest complexRequest = request.setQueryParameter("base", "paramValue");
        Logger.info("response is"+responsePromise)

    }

}

我正在关注错误：-

 error: annotation type not applicable to this kind of declaration
[error]         @Inject WSClient ws;
[error]         ^
[error] (compile:compileIncremental) javac returned nonzero exit code

那么，如何在Playframework-2.5.x中将WSClient注入Actor中？