即使在用@CrossOrigin(origins="* ")注释控制器之后，跨原点请求仍然被阻止？

Question

我有一个Spring靴控制器，如下所示

@CrossOrigin(origins="*")
public class FormController {
      @PostMapping(path="/basicForm")
 public String postResponseController(
              @RequestBody FormDomain loginForm) {
        System.err.println("basic form method called");
         return "file transfer completed successfully";
     }
}

我用@CrossOrigin（origins=“*”）注释了控制器以启用CORS。这是我的表单域类

public class FormDomain {
     private MultipartFile fileInput;

    public MultipartFile getFileInput() {
        return fileInput;
    }

    public void setFileInput(MultipartFile fileInput) {
        this.fileInput = fileInput;
    }
    }

和调用控制器方法的角度脚本

 onClickSubmit(data) {
        this.http.post("http://localhost:8080/basicForm", data).subscribe( (ob)=>(console.log(ob)));
      }

尽管我已经注释了控制器以启用CORS，但我在浏览器控制台中得到了以下错误：

Access to XMLHttpRequest at 'http://localhost:8080/basicForm' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

如何解决这个问题？

Answer 1

您必须在< code>FormController中添加< code>@RestController

@Controller是@Component类的特殊化，允许通过类路径扫描自动检测实现类。而@RestController是@Controller的特殊化，它消除了对@Adapsebody的需要。您可以参考@Controller， RestController