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我正在使用 Spring Boot 2 开发 Rest API，我正在尝试创建一个 ExceptionHandler 但它似乎不起作用。

我有以下@GetMapping 方法：

@GetMapping("/customers/{customerId}")
public Customer getCustomerById(@PathVariable Long customerId) {
    log.debug("### Enter: getCustomerById() for id: " + customerId);
    Optional<Customer> customer = customerRepository.findById(customerId);

    if (!customer.isPresent()) {
        throw new CustomerNotFoundException("The customer with id: " + customerId + " was not found!");
    }

    return customer.get();
}

customerRepository 它是一个扩展 CrudRepository 接口的接口。

customerNotFoundException 的 @ExceptionHandler 如下：

@ExceptionHandler(CustomerNotFoundException.class)
public final ResponseEntity handleCustomerNotFoundException
        (CustomerNotFoundException customerNotFoundException, WebRequest webRequest) {
    log.error("### Oups! We have a CustomerNotFoundException!!!");
    ExceptionResponse exceptionResponse = new ExceptionResponse(
            new Date(),
            customerNotFoundException.getMessage(),
            webRequest.getDescription(false));

    return new ResponseEntity(customerNotFoundException, HttpStatus.NOT_FOUND);
}

我还将 ResponseEntityExceptionHandler 扩展类注释如下：

@Slf4j
@RestController
@ControllerAdvice
public class CustomResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {

问题是，当我调用数据库中不存在的 customerId 的请求时，我不仅收到 CustomerNotFoundException 消息，而且收到很长的堆栈跟踪，例如：

{"cause":null,"stackTrace":[{"methodName":"getCustomerById","fileName":"CustomerResource.java","lineNumber":37,"className":"org.pdm.ib.pmt.router.controls.CustomerResource","nativeMethod":false},{"methodName":"invoke0","fileName":"NativeMethodAccessorImpl.java","lineNumber":-2,"className":"sun.reflect.NativeMethodAccessorImpl","nativeMethod":true},{"methodName":"invoke","fileName":"NativeMethodAccessorImpl.java","lineNumber":62,"className":"sun.reflect.NativeMethodAccessorImpl","nativeMethod":false},{"methodName":"invoke","fileName":"DelegatingMethodAccessorImpl.java","lineNumber":43,"className":"sun.reflect.DelegatingMethodAccessorImpl","nativeMethod":false},{"methodName":"invoke","fileName":"Method.java","lineNumber":498,"className":"java.lang.reflect.Method","nativeMethod":false},

等等...

问题是什么？

谢谢！

4

1 回答 1

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感谢@bestwilles，我找到了解决方案。这是返回

new ResponseEntity(exceptionResponse, HttpStatus.NOT_FOUND)

而是返回

new ResponseEntity(customerNotFoundException, HttpStatus.NOT_FOUND)

在 CustomResponseEntityExceptionHandler 类的 handleCustomerNotFoundException 方法中。

于 2018-03-17T16:07:05.783 回答