Spring REST：不支持請求方法“ GET”

Question

我試圖制作一個Spring Rest程序，但是當我嘗試為我的一個元素調用GET方法時遇到以下錯誤

發生意外錯誤（類型=不允許使用方法，狀態= 405）。 請求方法“ GET”不受支持

這是我的控制器代碼：

@RestController
@RequestMapping("/company/flight")
public class FlightController
{
private static final String template = "Hello, %s!";

@Autowired
private FlightRepo repo;

@RequestMapping("/greeting")
public String greeting(@RequestParam(value="name", defaultValue="World") String name) {
    return String.format(template, name);
}

@RequestMapping( method= RequestMethod.GET)
public FlightList getAll(){
    return repo.getAll();
}

@RequestMapping(value = "/flight/{id}", method = RequestMethod.GET)
public ResponseEntity<?> getById(@PathVariable int id){

    Flight fl = repo.findById(id);
    if (fl==null)
        return new ResponseEntity<String>("Flight not found",HttpStatus.NOT_FOUND);
    else
        return new ResponseEntity<Flight>(fl, HttpStatus.OK);
}

@RequestMapping(method = RequestMethod.POST)
public Flight create(@RequestBody Flight fl){
    repo.save(fl);
    return fl;

}

@RequestMapping(value = "/flight/{id}", method = RequestMethod.PUT)
public Flight update(@RequestBody Flight fl) {
    System.out.println("Updating flight ...");
    repo.update(fl.getFlightId(),fl);
    return fl;

}

@RequestMapping(value="/{id}", method= RequestMethod.DELETE)
public ResponseEntity<?> delete(@PathVariable int id){
    System.out.println("Deleting flight ... " + id);
    repo.deleteFlight(id);
    return new ResponseEntity<User>(HttpStatus.OK);

}


@RequestMapping("/{flight}/id")
public String name(@PathVariable int id){
    Flight result=repo.findById(id);
    System.out.println("Result ..." + result);

    return result.getAirport();
}

@ExceptionHandler
@ResponseStatus(HttpStatus.BAD_REQUEST)
public String flightError(Exception e) {
    return e.getMessage();
}
}

我已經嘗試了一些解決方案，但似乎沒有任何效果。 我大多數人看到他們正在處理POST方法，但是我只有一個POST方法，該方法與自定義值無關。

在此方法調用上發生錯誤

@RequestMapping(value = "/flight/{id}", method = RequestMethod.GET)
public ResponseEntity<?> getById(@PathVariable int id)
{

Flight fl = repo.findById(id);
if (fl==null)
    return new ResponseEntity<String>("Flight not found",HttpStatus.NOT_FOUND);
else
    return new ResponseEntity<Flight>(fl, HttpStatus.OK);
}

這就是我所說的方法：

show(()-> System.out.println(flightclient.getById(20)));

這是我稱之為的地方

public class Main {
private final static FlightClient flightclient=new FlightClient();
public static void main(String[] args) {
    RestTemplate restTemplate=new RestTemplate();
    flightclient.delete(20);
    Flight fly=new Flight(20,"Tokyo","Paris",50,"2017-07-01");
    try
    {
        show(()-> System.out.println(flightclient.create(fly)));
        show(()->{
            FlightList res=flightclient.getAll();
            for(Flight u:res){
                System.out.println(u.getFlightId()+" : "+u.getAirport());
            }
        });

        show(()-> System.out.println(flightclient.getById(20)));
    }catch(RestClientException ex){
        System.out.println("Exception ... "+ex.getMessage());
    }
}

其他所有方法都可以使用。如何解決此錯誤？ 謝謝

Answer 1

可能是您正在嘗試向此網址/company/flight/{id}發送請求。 您在類級別具有@RequestMapping ，當您指定類級別注釋時，該URL將是相對的。 因此， getById方法的url是/company/flight/flight/{id} 。

將getById的映射更改為@RequestMapping(value = "/{id}", method = RequestMethod.GET) ，然后可以將請求發送到/company/flight/{id} 。

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public ResponseEntity<?> getById(@PathVariable int id)
{

    Flight fl = repo.findById(id);
    if (fl==null)
        return new ResponseEntity<String>("Flight not found",HttpStatus.NOT_FOUND);
    else
        return new ResponseEntity<Flight>(fl, HttpStatus.OK);
}