如何从JSON中选择Angular 2 Array对象

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

@Injectable({
  providedIn: 'root'
})
export class DataService {
  constructor(private http: HttpClient) { }

  getJSONData() {
    return this.http.get('your_json_url');
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from 'path_to_your_service';

@Component({
  selector: 'app-your-component',
  templateUrl: './your-component.component.html',
  styleUrls: ['./your-component.component.css']
})
export class YourComponent implements OnInit {
  jsonData: any[];

  constructor(private dataService: DataService) { }

  ngOnInit() {
    this.dataService.getJSONData().subscribe((data: any[]) => {
      this.jsonData = data;
      // 在这里对JSON数据进行处理，选择Array对象
      // 例如，选择name属性为'John'的对象
      const selectedObjects = this.jsonData.filter(obj => obj.name === 'John');
      console.log(selectedObjects);
    });
  }
}