springMVC中的reponseEntity是干什么用的？

Question

看公司的项目 controller层里方法的返回值全都是ReponseEntity
这是干什么用的？

  @RequestMapping(value = "/getLeaderPosts", method = RequestMethod.POST)
    @ResponseBody
    public ResponseEntity<List<PostsDTO>> getLeaderPosts(@CurrentUserState UserState userState,@RequestBody PageInfo pageInfo, @RequestBody(required = false) PostsDTO dto) {
        ResponseEntity<List<PostsDTO>> retRes = new ResponseEntity<List<PostsDTO>>();
        PageBounds pageBounds = new PageBounds(pageInfo.getPage(), pageInfo.getPageSize());
        dto.setCreateUserId(userState.getUserId());
        retRes.setEntity(postsService.getLeaderPosts(dto, pageBounds));

        return retRes;
    }

Answer 1

响应实体类，自己定义的