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java - Spring MVC Rest Client 获取 HttpClientErrorException: 404 null

问题描述

我正在与客户端一起设置休息服务器，我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);
}

}

什么会导致问题？当我输入浏览器地址时：http://localhost:5000/points/1我通常会得到 id 1 的点。

标签： javaspringmodel-view-controllerhttp-status-code-404

解决方案

您在getPost()方法中合并的字符串将是：http://localhost:5000/points1而不是http://localhost:5000/points/1.

只需添加 就/可以了

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