在Angular前端代码中添加HttpHeaders以发送请求，同时向后端请求添加注解以解决CORS问题。

Angular示例代码：

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

const httpOptions = {
  headers: new HttpHeaders({
    'Content-Type': 'application/json', // 定义请求的数据格式
    'Access-Control-Allow-Origin': '*', // 允许所有源访问接口
    'Access-Control-Allow-Methods': 'POST', // 允许POST请求
    'Access-Control-Allow-Headers': 'Origin, Content-Type, X-Auth-Token, Authorization, accept, client-security-token' // 允许请求头携带的参数
  })
};

this.http.post(url, data, httpOptions).subscribe( res => {
  console.log(res);
});

Spring后端示例代码：

@CrossOrigin(origins = "*", allowedHeaders = "*", methods = {RequestMethod.POST})
@RestController
public class Controller {
  @PostMapping("/api")
  public ResponseEntity apiCall(@RequestBody Object obj) {
    // 处理请求
    return ResponseEntity.ok().build();
  }
}