import { HttpClient, HttpHeaders } from '@angular/common/http';
// ...
const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
const data = {"key": "value"};
this.http.post('http://example.com/api', data, httpOptions) .subscribe(response => { console.log(response); }, error => { console.error(error); });
在上面的示例中,'http://example.com/api”是API的URL,data是请求参数,httpOptions是请求头。确保这些参数都按照正确的方式设置。