曖昧@ExceptionHandler方法映射

我面臨着一個奇怪的問題，以下是我的UserController類曖昧@ExceptionHandler方法映射

@RequestMapping(value = "/list", method = RequestMethod.GET) 
    @ExceptionHandler(GenericException.class) 
    public ModelAndView list(@ModelAttribute(Constants.KEY_USER_RIGHTS) Map<String, Rights> rights,@ModelAttribute(Constants.KEY_LOGGED_IN_USER) User user, HttpServletRequest request) {//details omitted} 
@RequestMapping(value = "/invite", method = RequestMethod.POST) 
    @ExceptionHandler(GenericException.class) 
    public ModelAndView create(@ModelAttribute(value = "preRegister") PreRegister preRegister,Model model,HttpServletRequest request){//details omitted}

兩種方法當請求到達該控制器它拋出一個異常堆棧跟蹤如下：

java.lang.IllegalStateException: Ambiguous @ExceptionHandler method mapped for [class com.hcdc.coedp.safe.exception.GenericException]: {public org.springframework.web.servlet.ModelAndView com.hcdc.coedp.safe.controller.UserController.list(java.util.Map,com.hcdc.coedp.safe.domain.User,javax.servlet.http.HttpServletRequest), public org.springframework.web.servlet.ModelAndView com.hcdc.coedp.safe.controller.UserController.create(com.hcdc.coedp.safe.domain.PreRegister,org.springframework.ui.Model,javax.servlet.http.HttpServletRequest)}. 
    at org.springframework.web.method.annotation.ExceptionHandlerMethodResolver.addExceptionMapping(ExceptionHandlerMethodResolver.java:93) 
    at org.springframework.web.method.annotation.ExceptionHandlerMethodResolver.<init>(ExceptionHandlerMethodResolver.java:61) 
    at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.getExceptionHandlerMethod(ExceptionHandlerExceptionResolver.java:356) 
    at org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.doResolveHandlerMethodException(ExceptionHandlerExceptionResolver.java:306) 
    at org.springframework.web.servlet.handler.AbstractHandlerMethodExceptionResolver.doResolveException(AbstractHandlerMethodExceptionResolver.java:60) 
    at org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:136) 
    at org.springframework.web.servlet.DispatcherServlet.processHandlerException(DispatcherServlet.java:1148) 
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:985) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:368) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:97) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:100) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:78) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:35) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:177) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:187) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:79) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:380) 
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:169) 
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) 
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:233) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228) 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
    at java.lang.Thread.run(Thread.java:722)

以下是我GenericException類：

public class GenericException extends RuntimeException { 

    private String exceptionMsg; 

    public GenericException(String exceptionMsg) { 
     this.exceptionMsg = exceptionMsg; 
    } 

    public String getExceptionMsg() { 
     return exceptionMsg; 
    } 

    public void setExceptionMsg(String exceptionMsg) { 
     this.exceptionMsg = exceptionMsg; 
    } 
}

我不知道什麼是錯的。所以如果有人能解釋我，我會很感激。

來源

2012-12-31 Dangling Piyush

我認爲錯誤信息非常清楚 - 對於此異常，您應該只有一種方法註釋爲ExceptionHanlder。順便說一句，我認爲這兩種方法都不是一個好的選擇。

而另一個注意事項 - 您不應該在GenericException中使用字段exceptionMsg - 而是使用繼承的message字段。

來源

2012-12-31 08:50:37

「你應該只有一個註解爲ExceptionHandler的方法來處理這個異常。」那麼我怎麼能把自定義的異常消息扔到視圖層？或者這不是在春天做的方式。你可以給我提供一些細節。 –

看看https://github.com/isopov/haf/blob/master/src/main/java/com/sopovs/moradanen/haf/controller/department/AbstractDepartmentController.java - Exceptionhandler註釋的意思是，如果在任何控制器方法引發異常 - 比拋棄該方法（與任何java代碼一樣），並且此方法處理此異常。 –

謝謝你解釋我將學習這個註解用法。 –

曖昧@ExceptionHandler方法映射

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