Question

我正在与客户端一起设置Rest Server，并且已经面临几个小时的问题。当我调用getPoints（）方法时，一切正常，但是当我调用getPoint（Long id），deletePoint（Long id）和postPoint（）时，我得到：线程“ main”中的异常org.springframework.web.client.HttpClientErrorException ：404空。

客户端：

public List<Point> getPoints()
{
    RestTemplate restTemplate = new RestTemplate();
    ResponseEntity<List<Point>> pointResponse = restTemplate.exchange("http://localhost:5000/points", HttpMethod.GET, null,
            new ParameterizedTypeReference<List<Point>>()
            {});
    List<Point> points = pointResponse.getBody();
    return (points);
}

public Point getPoint(long id)
{
    RestTemplate restTemplate = new RestTemplate();
    Point point = restTemplate.getForObject("http://localhost:5000/points" + id, Point.class);
    return point;
}

public void postPoint()
{
    RestTemplate restTemplate = new RestTemplate();
    restTemplate.postForObject("http://localhost:5000/points", this, this.getClass());
}

public void deletePoint(Long id)
{
    RestTemplate restTemplate = new RestTemplate();
    restTemplate.delete("http://localhost:5000/points" + id);
}

服务器端：

public class PointsController {

private final PointsRepository repository;

PointsController(PointsRepository repository){
    this.repository=repository;
}

@GetMapping("/points/")
List<Points> all() {
    return repository.findAll();
}

@PostMapping("/points/")
Points newPoints(@RequestBody Points newPoints){
    return repository.save(newPoints);
}

@GetMapping(value = "/points/{id}/", produces = "application/json; charset=UTF-8")
Resource<Points> one(@PathVariable Long id) {
    Points point = repository.findById(id).orElseThrow(() -> new PointsNotFoundException(id));

    return new Resource<>(point,
            linkTo(methodOn(PointsController.class).one(id)).withSelfRel(),
            linkTo(methodOn(PointsController.class).all()).withRel("points"));
}

@DeleteMapping("/points/{id}/")
void deletePoints(@PathVariable Long id) {
    repository.deleteById(id);
}

}

什么会引起问题？当我放置浏览器地址：http://localhost:5000/points/1时，我通常会得到ID为1的点。

Answer 1

您在getPost()方法中要包含的字符串将是：http://localhost:5000/points1而不是http://localhost:5000/points/1。

只需添加/，您就可以开始使用

Answer 2

我不确定，但您可以尝试以下操作：

public void postPoint()
{
  RestTemplate restTemplate = new RestTemplate();
  restTemplate.postForObject("http://localhost:5000/points/", this, this.getClass());
}

因为我在服务器端看到了帖子映射：@PostMapping("/points/")

Spring MVC Rest Client获得HttpClientErrorException：404 null

2 个答案: