找不到名字'myobject'Angular2

Question

我遇到了angular2 v.2.4.0的问题，当我尝试导入类时，它叫我TS2304：找不到名称'HTTPTestService'（类的名称）代码component.ts

import { Component } from '@angular/core';
import { PictureRegister } from '../student.data';
import { HTTPTestService } from 'json.service';
@Component({
moduleId: module.id.toString(),
    selector: 'student-register',
    templateUrl: 'student-register.component.html',
    providers: [
        PictureRegister,
        HTTPTestService
    ]
})
export class StudentRegisterComponent {
    constructor( 
                 pictureRegister: PictureRegister,
                 httpJSON: HTTPTestService //Here is error
)

和service.ts

import {Injectable} from '@angular/core';
@Injectable()
export class HTTPTestService{
    constructor (_http: Http)
    {
        this.httpJSON = _http;
    }
//etc
}

我也有第二类文件，效果很好，但我不想把所有课程都放进去，你能帮助我吗？

Answer 1

import { HTTPTestService } from './json.service';