为什么响应实体正文返回空值？

Question

我是Java和创建API的新手。我试图简单地发出一个后请求，并得到一个具体的值。以下是我的代码:

@Service
@AllArgsConstructor
public class WebService {

    private RestTemplate restTemplate;
    private static final String PROJECT_URL = "http://localhost:8080/project";

    public ResponseEntity<ProjectResponse> createProject(Project project) {
        ResponseEntity<ProjectResponse> completeProject = restTemplate.postForEntity(PROJECT_URL, project, ProjectResponse.class);
        System.out.println("Response body " + completeProject.getBody());
        return completeProject;
    }

}

ProjectResponse类简单地包含:

@Data
@NoArgsConstructor
public class ProjectResponse {
    private String id;
}

问题是，id aøwaus 被返回为 （id=空）。即使当我使用“字符串”而不是项目响应时，一切正常，我看到ID已创建。因此，由于某种原因，将响应映射到项目响应类存在问题。

有人知道可能出了什么问题吗？

Answer 1

尝试这样做并处理这里的异常，使类ResponseErrorHandler并实现ResponseErrorHandler(i)

@Component
public class WebService {

private RestTemplate restTemplate;
private static final String PROJECT_URL = "http://localhost:8080/project";

public ProjectResponse createProject(Project project) {

ProjectResponseErrorHandler errorHandler = new ProjectResponseErrorHandler(
project.getId());
    restTemplate.setErrorHandler(errorHandler);
    ResponseEntity<ProjectResponse> completeProject = restTemplate.postForEntity(PROJECT_URL, project, ProjectResponse.class);
  log("Response body " + completeProject.getBody());
    return completeProject.getBody();
}
}

Answer 2

试试这个，使你的项目彭斯类与项目相同。

@Service
@AllArgsConstructor
public class WebService {

    private RestTemplate restTemplate;
    private static final String PROJECT_URL = "http://localhost:8080/project";

    public ResponseEntity<Project> createProject(Project newProject) {
        Project completeProject = restTemplate.postForObject(PROJECT_URL, newProject, Project.class);
        log("Response body " + completeProject.getBody());//Log this instead
         return ResponseEntity.ok(completeProject);
    }

}