Spring @ResponseStatus返回空响应

Question

在我的Spring API中,我想用Spring的注释@ResponseStatus处理来自诸如create,put和delete之类的操作的响应 .每个端点都能正常工作,但它们始终返回空响应.

为什么来自带注释的端点的响应是空的？

控制器:

import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.http.HttpStatus;

@RestController
@RequestMapping(value = "/v1/portfolios")
public class PortfolioController {

    @RequestMapping(method = RequestMethod.POST)
    @ResponseStatus(HttpStatus.CREATED)
    public void create(@RequestBody Portfolio resource) {
        repo.save(resource);
    }   

    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    @ResponseStatus(HttpStatus.OK)
    public void delete(@PathVariable("id") String id) {
        repo.removeById(id);
    }

}

Answer 1

为什么来自带注释的端点的响应是空的？

因为你的方法返回void(没有身体的意思).状态代码 - 它不是一个正文.

您可以尝试此操作以返回具有消息明确性的响应:

@RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
public ResponseEntity<String> delete(@PathVariable("id") String id) {
   repo.removeById(id);
return new ResponseEntity<>("Your message here", HttpStatus.OK);
    }

而不是ResponseEntity<String>你可以放ResponseEntity<YourCustomObject>,然后返回new ResponseEntity<>(yourCustomObject instance, HttpStatus.OK);它将在响应期间转换为JSON.

你也可以这样做:

@ResponseStatus(value = HttpStatus.OK, reason = "Some reason")

在这种情况下,您将返回以下内容:

{
    "timestamp": 1504007793776,
    "status": 200,
    "error": "OK",
    "message": "Some reason",
    "path": "/yourPath"
}