如何摆脱spring Boot的默认异常？

Question

我是spring boot的新手，我正在通过ControllerAdvisor向控制器添加自定义异常。在MyController.class中，我正在执行三个操作

null

@RestController
public class MyController {
    @Autowired
    private TicketServiceImpl ticketService;

    @GetMapping(/ticket)
    public ResponseEntity<?> getAllTickets() {

        List<Ticket> list=(List<Ticket>)ticketService.findAll();
        return new ResponseEntity<>(list, HttpStatus.OK);
    }

    @GetMapping(Constant.BASE_URL+"/{id}")
    public ResponseEntity<Ticket> getTicketById(@PathVariable("id") long id) {
        Optional<Ticket> ticketData = Optional.ofNullable(ticketService.get(id));

         if(!ticketData.isPresent()){
             throw new RecordNotFoundException("id-" + id);
         }
           return new ResponseEntity<>(ticketData.get(), HttpStatus.OK);
       
    }

    @PostMapping(/ticket)
    public ResponseEntity<Ticket> createTicket(@RequestBody Ticket ticket) {
          
            ticketService.save(ticket);
            return new ResponseEntity<>(ticket, HttpStatus.CREATED);
     }

}

@SuppressWarnings({"unchecked","rawtypes"})
@ControllerAdvice
public class CustomExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(Exception.class)
    public final ResponseEntity<Object> handleAllExceptions(Exception ex, WebRequest request) {
        List<String> details = new ArrayList<>();
        details.add(ex.getLocalizedMessage());
        ErrorResponse error = new ErrorResponse("Server Error", details);
        return new ResponseEntity(error, HttpStatus.INTERNAL_SERVER_ERROR);
    }

    @ExceptionHandler(RecordNotFoundException.class)
    public final ResponseEntity<Object> handleUserNotFoundException(RecordNotFoundException ex, WebRequest request) {
        List<String> details = new ArrayList<>();
        details.add(ex.getLocalizedMessage());
        ErrorResponse error = new ErrorResponse("Record Not Found", details);
        return new ResponseEntity(error, HttpStatus.NOT_FOUND);
    }

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
        List<String> details = new ArrayList<>();
        for(ObjectError error : ex.getBindingResult().getAllErrors()) {
            details.add(error.getDefaultMessage());
        }
        ErrorResponse error = new ErrorResponse("Validation Failed", details);
        return new ResponseEntity(error, HttpStatus.BAD_REQUEST);
    }

}

下面的类是特定于未找到的异常的。

@ResponseStatus(HttpStatus.NOT_FOUND)
public class RecordNotFoundException extends RuntimeException {
    public RecordNotFoundException(String exception) {
        super(exception);
    }
}

在application.properties中，我添加了以下三个条件

server.error.whitelabel.enabled=false
spring.mvc.throw-exception-if-no-handler-found=true
spring.resources.add-mappings=false

当我使用GET API http://localhost:8080/ticke访问我的服务器时，它应该抛出bad request异常，但它的抛出没有找到“404”异常，当我使用GET API http://localhost:8080/ticket/24时，在此中没有创建我的id。因此，它应该返回resource not found Exception.But,它返回的500内部服务器错误。

Answer 1

您得到的错误是因为Spring无法找到您要查找的endpoint。因此，它不对其应用任何控制器建议，因为它没有找到映射到所请求URL的控制器。

这里有一篇小文章更详细地解释它。