尝试使用Spring MVC 6.0.6编写一个简单的文件上传处理程序。使用POST上传文件，编码为multipart/form-data。在服务器端，处理程序是

import jakarta.servlet.annotation.MultipartConfig;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
@MultipartConfig
public class SimpleUpload {
    @PostMapping(path = "/upload")
    public ResponseEntity<String> uploadFile(@RequestParam("File") MultipartFile file) {
        return file.isEmpty() ?
                new ResponseEntity<String>(HttpStatus.NOT_FOUND) : new ResponseEntity<String>(HttpStatus.OK);
    }

}

获取此错误：Unable to process parts as no multi-part configuration has been provided。
我已经阅读了关于此错误的其他答案，因此我添加了多部分配置，如下所示：

@EnableWebMvc
@Configuration
@Import({ApplicationConfig.class})
public class MvcConfig implements WebMvcConfigurer {

    @Bean(name = "multipartResolver")
    public MultipartResolver getMultipartResolver() {
        return new StandardServletMultipartResolver();
    }
    @Bean(name = "filterMultipartResolver") // alternate name suggested by some people
    public MultipartResolver getFilterMultipartResolver() {
        return new StandardServletMultipartResolver();
    }
}

它似乎不起作用，因为错误总是一样的。
应用程序中的单元测试成功：

@WebAppConfiguration
@ContextConfiguration(classes = { MvcConfig.class, SimpleUpload.class })
@RunWith(SpringJUnit4ClassRunner.class)
public class MultipartPostRequestControllerUnitTest {
    @Autowired
    private WebApplicationContext webApplicationContext;

    @Test
    public void whenFileUploaded_thenVerifyStatus() throws Exception {
        MockMultipartFile file = new MockMultipartFile("File",
                "hello.txt",
                MediaType.TEXT_PLAIN_VALUE,
                "Hello, World!".getBytes());

        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
                .build();
        mockMvc.perform(multipart("/upload")
                .file(file))
                .andExpect(status().isOk());
    }
}

但是通过Postman向http://127.0.0.1:8080/upload发送文件会返回HTTP状态500，根本原因是Unable to process parts as no multi-part configuration has been provided。
我该怎么解决这个问题？
使用Tomcat 10.1.7运行应用程序。