如何在Angular 2中获取JSON文件

小编典典

如何在Angular 2中获取JSON文件

json

因为我是Angular的新手，所以有人可以提供一个简单的解决方案来使用angular 2加载JSON文件数据。

我的代码如下

Index.html

<html>

  <head>

    <title>Angular 2 QuickStart</title>

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="stylesheet" href="css/styles.css">

    <!-- 1. Load libraries -->

     <!-- Polyfill(s) for older browsers -->

    <script src="node_modules/core-js/client/shim.min.js"></script>

    <script src="node_modules/zone.js/dist/zone.js"></script>

    <script src="node_modules/reflect-metadata/Reflect.js"></script>

    <script src="node_modules/systemjs/dist/system.src.js"></script>

    <!-- 2. Configure SystemJS -->

    <script src="systemjs.config.js"></script>

    <script>

      System.import('app').catch(function(err){ console.error(err); });

    </script>

  </head>

  <!-- 3. Display the application -->

  <body>

    <my-app>Loading...</my-app>

  </body>

</html>

app.component.ts

import {Component} from '@angular/core';



@Component({

  selector: 'my-app',

  template: `

          <div id="main">

            Main Div

               <div id = "header"></div>

               <div id = "content">

                  <ul class="games">

                      <li>



                      </li>

                  </ul>

               </div>

          </div>

         `

})

export class AppComponent {

 }

games.json

{

    "games":[

        {

            "title":"Primary Operations",

            "enabled":true

        },

        {

            "title":"Curated Games",

            "enabled":false

        }

    ]

}

我想将所有游戏从games.json提取到app.component.ts的li中，请详细告知。

阅读 188

2020-07-27

共1个答案

小编典典

这是我解析JSON的代码的一部分，可能对您有帮助：

import { Component, Input } from '@angular/core';
import { Injectable }     from '@angular/core';
import { Http, Response, Headers, RequestOptions } from '@angular/http';
import {Observable} from 'rxjs/Rx';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';

@Injectable()
export class AppServices{

    constructor(private http: Http) {
         var obj;
         this.getJSON().subscribe(data => obj=data, error => console.log(error));
    }

    public getJSON(): Observable<any> {
         return this.http.get("./file.json")
                         .map((res:any) => res.json())
                         .catch((error:any) => console.log(error));

     }
}

2020-07-27