如何在另一个服务中创建依赖HttpService的类的实例?

服务-1

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class HttpService {
  constructor(
      private http: HttpClient
  ) {
     // do something with http
  }
}

服务2

import { Injectable } from '@angular/core';
import{ HttpService } from './user-account/http.service'

@Injectable({
  providedIn: 'root'
})
export class ServiceTwo{
  http: HttpService;
  constructor() {
     this.http = new HttpService() ;
  }
}

这不管用,因为 this.httpService = new HttpService()

所以我尝试了另一种方法:

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class HttpService {
  http: HttpClient;
  constructor() {
     this.http = new HttpClient();
  }
}

服务2

import { Injectable } from '@angular/core';
import{ HttpService } from './user-account/http.service'

@Injectable({
  providedIn: 'root'
})
export class ServiceTwo{
  http: HttpService;
  constructor() {
     this.http = new HttpService() ;
     // do something with http
  }
}

这不起作用,因为 HttpService 需要一些论证。我不知道这场争论的细节。