模块未找到:错误:无法解析“D：\ask\src\app\service”中的“@角/http”

Question

我想做插入使用laravel和角，我想设置标题，但它给我这个错误。

模块未找到:错误:无法解析“D：\ask\src\app\service”中的“@角/http”

laravel

public/index.php

<?php
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, PATCH, PUT, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: Origin, Content-Type, X-Auth-Token');

/**
 * Laravel - A PHP Framework For Web Artisans
 *
 * @package  Laravel
 * @author   Taylor Otwell <taylor@laravel.com>
 */

角

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { RouterModule , Routes} from '@angular/router';
import { RoutingModuleModule } from './routing-module.module';
import { FormsModule } from '@angular/forms'; 
import { HttpClientModule } from '@angular/common/http' ;


import { AppComponent } from './app.component';
import { HeaderComponent } from './components/header/header.component';
import { FooterComponent } from './components/footer/footer.component';
import { TaskManagerComponent } from './components/task-manager/task-manager.component';
import { TaskFormComponent } from './components/task-manager/task-form/task-form.component';
import { TaskListComponent } from './components/task-manager/task-list/task-list.component';
import { TaskDetailComponent } from './components/task-manager/task-detail/task-detail.component';
import { TaskItemComponent } from './components/task-manager/task-list/task-item/task-item.component';
import { from } from 'rxjs';

@NgModule({
  declarations: [
    AppComponent,
    HeaderComponent,
    FooterComponent,
    TaskManagerComponent,
    TaskFormComponent,
    TaskListComponent,
    TaskDetailComponent,
    TaskItemComponent,
  ],
  imports: [
    BrowserModule,
    RoutingModuleModule,
    FormsModule,
    HttpClientModule

  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

task.service.ts

import { Injectable } from '@angular/core';
import { Task } from '../Task';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { Headers , RequestOptions } from '@angular/http';

@Injectable({
  providedIn: 'root'
})
export class TaskService {

  Headers:Headers = new Headers();
  Options:any;

  serveur : string='http://127.0.0.1:8000/';

  constructor(public http:HttpClient) {
    this.Headers.append('enctype','multipart/form-data');
    this.Headers.append('Content-Type','application/json');
    this.Headers.append('X-Requested-with','XMLHttpRequest');
    this.Options = new RequestOptions({Headers:this.Headers});
   }

  addTask(title):Observable<Task>{
    const newTask=new Task(title);
    //console.log(newTask);
    return this.http.post<Task>(this.serveur+'add',newTask);
  }  
}

Answer 1

您似乎在使用不推荐的API和特性。

请阅读https://angular.io/guide/deprecations并检查您使用的模块。

导入

import { HttpClient, HttpHeaders } from '@angular/common/http';

使用实例

const httpOptions = {
  headers: new HttpHeaders({ 'Content-Type': 'application/json' })
};
.
.
.
this.http.put<any>(url, o, httpOptions);
.
.
.

Answer 2

在task.service.ts中，而不是下面的代码

import { Headers , RequestOptions } from '@angular/http';

用这个：

import { HttpClient, HttpHeaders } from '@angular/common/http';

并设置如下选项：

 const httpOptions = {
      headers: new HttpHeaders({ 
        'enctype':'multipart/form-data',
        'Content-Type': 'application/json',
        'X-Requested-with':'XMLHttpRequest'
     })
};

addTask(title):Observable<Task>{
    const newTask=new Task(title);
    //console.log(newTask);
    return this.http.post<Task>(this.serveur+'add',newTask, httpOptions);
  } 

注意:通过拦截器服务添加标头的最佳方法。要添加拦截器，请参考：在角度上添加拦截器的最佳方法

Answer 3

在您的servie import { HttpHeaders, HttpRequest } from '@angular/common/http'中，而不是Headers和RequestOptions，因为它们被废弃了。