如何在Angular中正确使用post请求将字符串发送到json服务器

import { HttpClient, HttpHeaders } from '@angular/common/http';

constructor(private http: HttpClient) { }

sendDataToServer(data: string) {
  const url = '服务器的URL';
  const headers = new HttpHeaders().set('Content-Type', 'application/json');
  const body = JSON.stringify({ data: data });

  return this.http.post(url, body, { headers: headers });
}

this.sendDataToServer('要发送的字符串').subscribe(
  response => {
    console.log('请求成功', response);
  },
  error => {
    console.error('请求失败', error);
  }
);