如何使用Annotation链接自定义拦截器

我手头有一个自定义拦截器，我希望它与使用注释的Action类相关联。 我使用struts.xml中声明的那个添加了interceptor-ref但是得到了exception，

"SEVERE: Exception starting filter Struts2 Unable to load configuration. - [unknown location]" 

我的Action类如下，

 @Action(value = "/login", results = { @Result(name = "success", location = "/Welcome.jsp"), @Result(name = "error", location = "/Login.jsp") }, interceptorRefs = { @InterceptorRef("defaultStack"), @InterceptorRef("myLogging")} ) public String validateCredentials() { if (this.userName.equals("Raj") && this.password.equals("aspire")) { return "success"; } else { // addActionError(getText("error.login")); return "error"; } } 

我的struts.xml如下，

错误堆栈：

 SEVERE: Exception starting filter Struts2 Unable to load configuration. - [unknown location] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403) at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: Unable to find interceptor class referenced by ref-name loggingStack - [unknown location] at com.opensymphony.xwork2.config.providers.InterceptorBuilder.constructInterceptorReference(InterceptorBuilder.java:52) at org.apache.struts2.convention.DefaultInterceptorMapBuilder.buildInterceptorList(DefaultInterceptorMapBuilder.java:99) at org.apache.struts2.convention.DefaultInterceptorMapBuilder.build(DefaultInterceptorMapBuilder.java:90) at org.apache.struts2.convention.DefaultInterceptorMapBuilder.build(DefaultInterceptorMapBuilder.java:74) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.createActionConfig(PackageBasedActionConfigBuilder.java:676) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildConfiguration(PackageBasedActionConfigBuilder.java:493) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:278) at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:52) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:200) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55) ... 21 more Dec 22, 2011 3:30:22 PM org.apache.catalina.core.StandardContext start SEVERE: Error filterStart Dec 22, 2011 3:30:22 PM org.apache.catalina.core.StandardContext start SEVERE: Context [/StrutsAnnotation] startup failed due to previous errors 

Answer 1

我没有使用带有或不带struts2的注释的exp，但我相信你正在使用convention-plugin 。这是他们对你的问题所说的快速镜头。

如果您收到“无法找到引用名称XYZ引用的拦截器类”之类的错误。 这意味着公约放置您的操作的包不会扩展定义拦截器的包。 要解决这个问题

1. 使用@ParentPackage注释（或struts.convention.default.parent.package）传递定义拦截器的包的名称。
2. 用XML创建一个扩展定义拦截器的包的包，并使用@ParentPackage（或Struts.convention.default.parent.package）指向它。

有关详细信息，请参阅文档

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