grails - 由于缺少默认 c'tor，bean 的实例化失败

问题描述

在 Grails 3.3.6 插件中，我们添加了从 RestfulController 派生的 CrudController。这会导致使用包含 CrudController 的插件的其他插件中的集成测试不再起作用。抛出以下异常：

Error creating bean with name 'com.ic.crud.CrudController': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.ic.crud.CrudController]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.ic.crud.CrudController.<init>()
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.ic.crud.CrudController': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.ic.crud.CrudController]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.ic.crud.CrudController.<init>()
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1163)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1107)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1080)
    at org.spockframework.spring.SpringMockTestExecutionListener.beforeTestMethod(SpringMockTestExecutionListener.java:54)
    at org.spockframework.spring.AbstractSpringTestExecutionListener.beforeTestMethod(AbstractSpringTestExecutionListener.java:23)
    at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:269)
    at org.spockframework.spring.SpringTestContextManager.beforeTestMethod(SpringTestContextManager.java:54)
    at org.spockframework.spring.SpringInterceptor.interceptSetupMethod(SpringInterceptor.java:45)
    at org.spockframework.runtime.extension.AbstractMethodInterceptor.intercept(AbstractMethodInterceptor.java:28)
    at org.spockframework.runtime.extension.MethodInvocation.proceed(MethodInvocation.java:87)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:147)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:129)
    at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.ic.crud.CrudController]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.ic.crud.CrudController.<init>()
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1155)
    ... 34 more
Caused by: java.lang.NoSuchMethodException: com.ic.crud.CrudController.<init>()
    at java.lang.Class.getConstructor0(Class.java:3082)
    at java.lang.Class.getDeclaredConstructor(Class.java:2178)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
    ... 35 more

这个异常被嵌套了好几次。如果任何域类使用 @Resource(superClass=CrudController) 注释或存在其他扩展 CrudController 的控制器类，则会发生异常。

在 CrudController 中添加默认 c'tor 是不可能的，因为 RestfulController 中不存在。

标签： grailsgrails-controller

grails - 由于缺少默认 c'tor，bean 的实例化失败

问题描述

解决方案

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