擅长:python、mysql、java
<p>从<a href="https://angular.io/api/common/http/HttpClient#get" rel="nofollow noreferrer">document of angular's http client</a>开始,返回值的类型<code>http.get()</code>是<code>Observable</code></p>
<p>因此,如果要获取服务器响应的数据,必须按以下方式订阅:</p>
<pre><code>data = {};
getAnnounce() {
this.http.get('http://127.0.0.1:5000/retrieve_data')
.subscribe(result => this.data = result);
}
</code></pre>