java - 将 Spring 3.1 与 RequestMappingHandlerAdapter 一起使用时出现默认构造函数错误

Question

我有一个自定义参数解析器SecurityRequestParametersArgumentResolver，它可以与 Spring 3.0.7 一起使用，但在 Spring 3.1.2 中失败。堆栈跟踪和测试驱动程序代码显示在下面。
当我查看堆栈跟踪时，似乎没有调用 SecurityRequestParametersArgumentResolver.resolve( ) 。相反，我在堆栈跟踪中看到 HandlerMethodArgumentResolverComposite.resolve。

建议？

我已经更新了 java 代码以使用 HandlerMethodArgumentResolver(它是 3.0.7 中的 AnnotationMethodHandlerAdapter)，但是在进行运行时集成测试时会出现此堆栈跟踪:

 Caused by: java.lang.NoSuchMethodException: xyz.security.web.SecurityRequestParameters.<init>()
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.getDeclaredConstructor(Unknown Source)
    at org.springframework.beans.BeanUtils.BeanUtils.BeanUtils.instantiateClass(Class<T>) line: 104     
                 ServletModelAttributeMethodProcessor(ModelAttributeMethodProcessor).createAttribute(String, MethodParameter, WebDataBinderFactory, NativeWebRequest) line: 132          
                 ServletModelAttributeMethodProcessor.createAttribute(String, MethodParameter, WebDataBinderFactory, NativeWebRequest) line: 81       
                ServletModelAttributeMethodProcessor(ModelAttributeMethodProcessor).resolveArgument(MethodParameter, ModelAndViewContainer, NativeWebRequest, WebDataBinderFactory) line: 103             
                HandlerMethodArgumentResolverComposite.resolveArgument(MethodParameter, ModelAndViewContainer, NativeWebRequest, WebDataBinderFactory) line: 75     
                ServletInvocableHandlerMethod(InvocableHandlerMethod).getMethodArgumentValues(NativeWebRequest, ModelAndViewContainer, Object...) line: 156     
                ServletInvocableHandlerMethod(InvocableHandlerMethod).invokeForRequest(NativeWebRequest, ModelAndViewContainer, Object...) line: 117     
                ServletInvocableHandlerMethod.invokeAndHandle(NativeWebRequest, ModelAndViewContainer, Object...) line: 96           
                RequestMappingHandlerAdapter.invokeHandlerMethod(HttpServletRequest, HttpServletResponse, HandlerMethod) line: 617            
                RequestMappingHandlerAdapter.handleInternal(HttpServletRequest, HttpServletResponse, HandlerMethod) line: 578         
                RequestMappingHandlerAdapter(AbstractHandlerMethodAdapter).handle(HttpServletRequest, HttpServletResponse, Object) line: 80    
                SecuritySystemTestStartUp$1(DispatcherServlet).doDispatch(HttpServletRequest, HttpServletResponse) line: 923                
                SecuritySystemTestStartUp$1(DispatcherServlet).doService(HttpServletRequest, HttpServletResponse) line: 852                
                SecuritySystemTestStartUp$1(FrameworkServlet).processRequest(HttpServletRequest, HttpServletResponse) line: 882               
                SecuritySystemTestStartUp$1(FrameworkServlet).doPost(HttpServletRequest, HttpServletResponse) line: 789                
                SecuritySystemTestStartUp$1(HttpServlet).service(HttpServletRequest, HttpServletResponse) line: 637              
                SecuritySystemTestStartUp$1(HttpServlet).service(ServletRequest, ServletResponse) line: 717                
                SecurityExternalAPISystemTest.testEncrypt() line: 86     
                 NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]        
                 NativeMethodAccessorImpl.invoke(Object, Object[]) line: not available               
                 DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: not available       
                 Method.invoke(Object, Object...) line: not available       
                 FrameworkMethod$1.runReflectiveCall() line: 44             
                 FrameworkMethod$1(ReflectiveCallable).run() line: 15 
                 FrameworkMethod.invokeExplosively(Object, Object...) line: 41              
                 InvokeMethod.evaluate() line: 20            
                 RunBeforeTestMethodCallbacks.evaluate() line: 74         
                 RunAfterTestMethodCallbacks.evaluate() line: 83            
                 SpringRepeat.evaluate() line: 72               
                 SecuritySpringJUnitRunner(SpringJUnit4ClassRunner).runChild(FrameworkMethod, RunNotifier) line: 231           
                 SecuritySpringJUnitRunner(BlockJUnit4ClassRunner).runChild(Object, RunNotifier) line: 49         
                 ParentRunner$3.run() line: 193 
                 ParentRunner$1.schedule(Runnable) line: 52     
                 SecuritySpringJUnitRunner(ParentRunner<T>).runChildren(RunNotifier) line: 191            
                 ParentRunner<T>.access$000(ParentRunner, RunNotifier) line: 42           
                 ParentRunner$2.evaluate() line: 184       
                 RunBefores.evaluate() line: 28  
                 RunBeforeTestClassCallbacks.evaluate() line: 61               
                 RunAfterTestClassCallbacks.evaluate() line: 71   
                 SecuritySpringJUnitRunner(ParentRunner<T>).run(RunNotifier) line: 236             
                 SecuritySpringJUnitRunner(SpringJUnit4ClassRunner).run(RunNotifier) line: 174               
                 JUnit4TestClassReference(JUnit4TestReference).run(TestExecution) line: 50      
                 TestExecution.run(ITestReference[]) line: 38      
                 RemoteTestRunner.runTests(String[], String, TestExecution) line: 467    
                 RemoteTestRunner.runTests(TestExecution) line: 683   
                 RemoteTestRunner.run() line: 390           
                 RemoteTestRunner.main(String[]) line: 197

SecuritySystemTestStartUp 中的测试驱动程序代码使用 @ContextConfiguration 进行注释:

 @RunWith(SecuritySpringJUnitRunner.class)
 @ContextConfiguration(loader = MockServletContextWebContextLoader.class,
         locations = { "classpath:/spring-system-test.xml" })
 public abstract class SecuritySystemTestStartUp
 {
     private static DispatcherServlet dispatcherServlet;

     ...     
     public static DispatcherServlet getDispatcherServlet()
     {
         try
         {
             if (dispatcherServlet == null)
             {
                 final GenericWebApplicationContext context = new GenericWebApplicationContext();

                 context.setParent(MockServletContextWebContextLoader.getInstance());
                 context.refresh();

                 dispatcherServlet = new DispatcherServlet(context);
                 dispatcherServlet.init(new MockServletConfig());
             }
         }
         catch (final Exception ex)
         ...
         return dispatcherServlet;
     }
 }

参数解析器(与 Spring 3.0.7 兼容)用于 postProcessAfterInitialization 中。下面是参数解析器的代码摘录。

public class AnnotationMethodHandlerBeanPostProcessor extends InstantiationAwareBeanPostProcessorAdapter {

@Autowired
public AnnotationMethodHandlerBeanPostProcessor(final SecurityRequestParametersArgumentResolver resolver)
{
    super();
    _resolver = resolver;
}

@Override
public Object postProcessAfterInitialization(final Object bean, final String beanName)
{
     if (bean instanceof RequestMappingHandlerAdapter)
    {
        final RequestMappingHandlerAdapter adapter = (RequestMappingHandlerAdapter) bean;
        final List<HttpMessageConverter<?>> converters =
            adapter.getMessageConverters();

        converters.add(new BinaryMessageConverter());
        List<HandlerMethodArgumentResolver> customArgumentResolvers = new ArrayList<HandlerMethodArgumentResolver>();
        customArgumentResolvers.add(_resolver);

        adapter.setCustomArgumentResolvers(customArgumentResolvers);
        adapter.setMessageConverters(adapter.getMessageConverters());
    }

    return super.postProcessAfterInitialization(bean, beanName);
}

...

}

并在 Spring 配置中指定为 ...

<bean id="SecurityRequestParametersArgumentResolver"
    class="xyz.security.web.SecurityRequestParametersArgumentResolver">
    <constructor-arg ref="CredentialsManager" />
    <constructor-arg ref="TokenService" />
</bean>

<!-- A bean post-processor that registers the SecurityRequestParametersArgumentResolver. -->
<bean class="xyz.security.web.AnnotationMethodHandlerBeanPostProcessor">
    <constructor-arg index="0" ref="SecurityRequestParametersArgumentResolver" />
</bean>

参数解析器的流程如下:

@Component public class SecurityRequestParametersArgumentResolver implements HandlerMethodArgumentResolver { @Autowired // implicitly autowired (not in xml) private RequestMappingHandlerAdapter requestMappingHandlerAdapter;

private final CredentialsManager _credentialsManager;
private final TokenService _tokenService;

private RequestResponseBodyMethodProcessor requestResponseBodyMethodProcessor = null;

/* For the component scan... */
SecurityRequestParametersArgumentResolver()
{
    this(null, null);
}

public SecurityRequestParametersArgumentResolver(final CredentialsManager credentialsManager,
        final TokenService tokenService)
{
    super();
    _credentialsManager = credentialsManager;
    _tokenService = tokenService;
}

public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
        NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception
{

    if (parameter != null && SecurityRequestParameters.class.equals(parameter.getParameterType()))
    {
        String productName = webRequest.getHeader(HttpHeader.PRODUCT_CONTAINER_HEADER.value());

        ...

        return new SecurityRequestParameters(credentials, contentType, acceptType, dataEncoding,
                sessionIdentifier, remoteIpAddress, securityProductName);
    }
    return new Object();
}

public boolean supportsParameter(MethodParameter parameter)
{
    return getRequestResponseBodyMethodProcessor().supportsParameter(parameter);
}

private RequestResponseBodyMethodProcessor getRequestResponseBodyMethodProcessor()
{
    if (requestResponseBodyMethodProcessor == null)
    {
        List<HttpMessageConverter<?>> messageConverters =
                requestMappingHandlerAdapter.getMessageConverters();
        requestResponseBodyMethodProcessor = new RequestResponseBodyMethodProcessor(messageConverters);
    }
    return requestResponseBodyMethodProcessor;
}

}

最后...这是 Spring 配置中的注释驱动标签

  <mvc:annotation-driven>
    <mvc:argument-resolvers>
      <bean class="com.trgr.cobalt.security.web.SecurityRequestParametersArgumentResolver" />
    </mvc:argument-resolvers>
 </mvc:annotation-driven>

Answer 1

鉴于您的评论，我认为您必须将 supportsParameter 更改为以下内容:

public boolean supportsParameter(MethodParameter parameter)
{
    return parameter.getParameterAnnotation(ParamResolver.class)!=null
}