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Grails的3文檔Interceptors vs Filters下稱：如何在Grails 3中使用過濾器而不是攔截器？
In versions of Grails prior to Grails 3.0, Grails supported the notion of filters. These are still supported for backwards compatibility but are considered deprecated.
我有一個大的Grails 2.5應用程序遷移到Grails的3.2和想使用過濾器來保持。
如何讓過濾器在Grails中工作3. *？
按[http://docs.grails.org/latest/guide/upgrading.html]，我加入compile 'org.grails:grails-plugin-filters:3.0.12'和移動從grails-app/conf過濾器類grails-app/controllers，但後來我得到以下異常：
java.lang.NullPointerException: null
at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1337)
at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1197)
at java.beans.Introspector.getBeanInfo(Introspector.java:426)
at java.beans.Introspector.getBeanInfo(Introspector.java:173)
at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:3318)
at java.security.AccessController.doPrivileged(Native Method)
at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:3316)
at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:3293)
at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:260)
at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:302)
at org.grails.plugins.web.filters.FilterToHandlerAdapter.$getStaticMetaClass(FilterToHandlerAdapter.groovy)
at org.grails.plugins.web.filters.FilterToHandlerAdapter.<init>(FilterToHandlerAdapter.groovy:63)
at org.grails.plugins.web.filters.FiltersGrailsPlugin.reloadFilters(FiltersGrailsPlugin.groovy:195)
at org.grails.plugins.web.filters.FiltersGrailsPlugin.doWithApplicationContext(FiltersGrailsPlugin.groovy:72)
at org.grails.plugins.DefaultGrailsPlugin.doWithApplicationContext(DefaultGrailsPlugin.java:523)
at org.grails.plugins.AbstractGrailsPluginManager.doPostProcessing(AbstractGrailsPluginManager.java:224)
at grails.boot.config.GrailsApplicationPostProcessor.onApplicationEvent(GrailsApplicationPostProcessor.groovy:246)
at grails.boot.config.GrailsApplicationPostProcessor.onApplicationEvent(GrailsApplicationPostProcessor.groovy)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:372)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
at grails.boot.GrailsApp.run(GrailsApp.groovy:83)
at grails.boot.GrailsApp.run(GrailsApp.groovy:388)
at grails.boot.GrailsApp.run(GrailsApp.groovy:375)
at grails.boot.GrailsApp$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
at app6.Application.main(Application.groovy:8)
不錯的堆棧跟蹤！你的項目中是否有任何代碼？ –
只是一個新創建的應用程序3.2與此世界你好濾波器： '$貓的grails-app /控制器/ APP6/Filter1Filters.groovy 包APP6 類Filter1Filters { \t DEF濾波器= { F1（控制器：'*'，action：'*'）before = { println「!!」 } } } }' – Ivan
嗨@Ivan，你找到了解決辦法嗎？ – Parth