ExceptionHandlerExceptionResolver在Spring 5中始终返回200个响应代码

Question

我已经从Spring 4.2升级到Spring 5.0.5。 升级后，我的Junits失败，并出现以下错误。

java.lang.AssertionError: Testing return value. expected:<405> but was:<200>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:834)
at org.junit.Assert.assertEquals(Assert.java:645)
at 

下面是我的代码：

`package com.hp.ci.mgmt.controllers;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.springframework.beans.TypeMismatchException;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotReadableException;
import 
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartException;
import 

org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver;

import com.fasterxml.jackson.core.JsonLocation;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException;


public class AbstractBaseControllerTest extends AbstractBaseController
{
ExceptionHandlerExceptionResolver resolver = new ExceptionHandlerExceptionResolver();
ObjectMapper mapper = new ObjectMapper();

private MockHttpServletRequest request;
private MockHttpServletResponse response;

@Mock
CiException cie;

@SuppressWarnings("rawtypes")
@Before
public void setup()
{
    final List<HttpMessageConverter<?>> messageConvertersList = new ArrayList<HttpMessageConverter<?>>();
    messageConvertersList.add(new MappingJackson2HttpMessageConverter());
    resolver.setMessageConverters(messageConvertersList);
    request = new MockHttpServletRequest();
    response = new MockHttpServletResponse();

    MockitoAnnotations.initMocks(this);
    Mockito.when(cie.getErrorSource()).thenReturn("test");
}

@Test
public void testUnsupportedOperationException()
        throws Exception
{
    validateException(HttpStatus.METHOD_NOT_ALLOWED, new RequestNotAllowedException());
}

private void validateException(final HttpStatus expectedStatus, final 
Exception e)
        throws Exception
{
    validateExceptionStatus(expectedStatus, e);        
}

 private void validateExceptionStatus(final HttpStatus expectedStatus, final Exception e)
        throws Exception
{
    resolver.resolveException(request, response, this, e);
    if (expectedStatus == null)
    {
        assertEquals("Testing return value.", HttpStatus.BAD_REQUEST.value(), response.getStatus());
    }
    else
    {
        assertEquals("Testing return value.", expectedStatus.value(), response.getStatus());
    }

}

问题是以下代码始终返回200状态代码，因此我的所有测试均失败。

resolver.resolveException（request，response，this，e）;

有谁知道如何解决这个问题？

Answer 1

我找到了导致问题的原因。 看起来像下面一行中的“ this”没有扩展HandlerMethod，所以resolveException不做任何事情就返回null。

resolver.resolveException（request，response，this，e）;

@Override
protected boolean shouldApplyTo(HttpServletRequest request, @Nullable Object 
handler) {
    if (handler == null) {
        return super.shouldApplyTo(request, null);
    }
    else if (handler instanceof HandlerMethod) {
        HandlerMethod handlerMethod = (HandlerMethod) handler;
        handler = handlerMethod.getBean();
        return super.shouldApplyTo(request, handler);
    }
    else {
        return false;
    }
}

有人可以帮助我配置处理程序。 如何实现HandlerMethod？