Java 如何删除额外字段'；装饰类'；在Spring数据投影的JSON响应中？

您好，我正在使用简化原始对象“公告”。我为我需要的字段创建了带有get方法的接口：

    public interface SimplifiedAnnouncement{

    String getTitle();

    Integer getPrice();

    String getPlace();
}

然后我就在存储库中使用它了：

public interface AnnouncementRepository extends JpaRepository<Announcement,Long> {

     @Query("SELECT a.id AS id, a.title AS title, a.price AS price, a.place AS place FROM Announcement a")
        Page<SimplifiedAnnouncement> getAllSimplifiedAnnouncements(Pageable pageable);
}

@RequestMapping(value = "/announcements",
        method = RequestMethod.GET,
        params = "places",
        produces = MediaType.APPLICATION_JSON_VALUE)
    @Timed
    public ResponseEntity<List<SimplifiedAnnouncement>> getAllAnnouncements()
        throws URISyntaxException {
        log.debug("REST request to get a page of Announcements");
        Page<SimplifiedAnnouncement> page = announcementRepository.getAllSimplifiedAnnouncements(new PageRequest(0, 100000));
        HttpHeaders headers = PaginationUtil.generatePaginationHttpHeaders(page, "/api/announcements");
        return new ResponseEntity<>(page.getContent(), headers, HttpStatus.OK);
    }

---

感谢您的关注，亲爱的开发人员。

问题可能源于将

页面

响应包装在一个ResponseEntity中

您是否尝试只输出响应，以检查序列化中的错误

@RequestMapping(value = "/announcements",
    method = RequestMethod.GET,
    params = "places",
    produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody // <- this makes sure to return the return object
@Timed
public Page<SimplifiedAnnouncement> getAllAnnouncements()
    throws URISyntaxException {
    log.debug("REST request to get a page of Announcements");
    Page<SimplifiedAnnouncement> page = announcementRepository.getAllSimplifiedAnnouncements(new PageRequest(0, 100000));
    return page;
}

@RequestMapping（value=“/announcements”，
method=RequestMethod.GET，
params=“places”，
products=MediaType.APPLICATION\u JSON\u值）
@ResponseBody/这是Spring 4.3中代理行为稍有改变的副作用。即将发布的bugfix版本也将发布

同时，您可以在投影界面上重新声明
类getDecoratedClass（）
，并使用
@JsonIgnore
对其进行注释，因为您没有使用分页。您是否尝试将存储库中的响应类型从
页面
更改为
列表
，如Joey中所定义，我正在使用REST服务中的分页。你可以在上面看到。我得到了这个错误<代码>无法在此ManagedType上找到具有给定名称[decoratedClass]的属性

。只要在投影界面上声明就足够了吗？

@RequestMapping(value = "/announcements",
    method = RequestMethod.GET,
    params = "places",
    produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody // <- this makes sure to return the return object
@Timed
public Page<SimplifiedAnnouncement> getAllAnnouncements()
    throws URISyntaxException {
    log.debug("REST request to get a page of Announcements");
    Page<SimplifiedAnnouncement> page = announcementRepository.getAllSimplifiedAnnouncements(new PageRequest(0, 100000));
    return page;
}