使用angular从后台检索所有数据

ng add @angular/common@latest

import { HttpClientModule } from '@angular/common/http';

@NgModule({
  imports: [
    // other imports
    HttpClientModule
  ],
  // other module properties
})
export class AppModule { }

ng generate service data

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

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private apiUrl = 'https://api.example.com/data'; // 替换为你的API URL

  constructor(private http: HttpClient) {}

  getAllData(): Observable<any> {
    return this.http.get(this.apiUrl);
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-root',
  template: `
    <div *ngFor="let item of data">
      {{ item | json }}
    </div>
  `
})
export class AppComponent implements OnInit {
  data: any[] = [];

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getAllData().subscribe(
      (response) => {
        this.data = response;
      },
      (error) => {
        console.error('Error fetching data', error);
      }
    );
  }
}