【发布时间】：2014-06-22 04:49:46
【问题描述】：
我遇到了 Spring 和 Jasypt EncryptablePropertyPlaceholderConfigurer 的问题。看来我正在破坏 HandlerStageInterceptor 组件的自动装配。当我删除与占位符相关的配置中的最后三个 bean 时，一切都按预期工作并且拦截器已注册。当我将 bean 留在其中时，通常自动装配的拦截器为空，并且 Spring 抛出了 NullPointerException。
我很难调试这个问题。有问题的自动装配组件不包含 @Value 的任何用法以及需要解析/解密的属性，也不包含任何依赖项。
@Configuration
@ComponentScan({"com.example.package"})
@EnableWebMvc
public class ApplicationConfiguration extends WebMvcConfigurerAdapter {
@Autowired
private HandlerStageInterceptor handlerStageInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
Logger.getAnonymousLogger().info("===== Registry: " + handlerStageInterceptor);
registry.addInterceptor(handlerStageInterceptor);
}
@Bean
public EnvironmentStringPBEConfig setupEnvironmentStringPBEConfig() {
EnvironmentStringPBEConfig config = new EnvironmentStringPBEConfig();
config.setAlgorithm("PBEWithMD5AndDES");
config.setPasswordEnvName("APP_ENCRYPTION_PASSWORD");
return config;
}
@Bean
public StandardPBEStringEncryptor setupStringEncryptor() {
StandardPBEStringEncryptor encryptor = new StandardPBEStringEncryptor();
encryptor.setConfig(setupEnvironmentStringPBEConfig());
return encryptor;
}
@Bean
public PropertyPlaceholderConfigurer setupPropertyPlaceholderConfigurer() {
EncryptablePropertyPlaceholderConfigurer configurer = new EncryptablePropertyPlaceholderConfigurer(setupStringEncryptor());
configurer.setLocation(new DefaultResourceLoader().getResource("classpath:properties/application.${RUN_ENV}.properties"));
configurer.setIgnoreResourceNotFound(false);
configurer.setIgnoreUnresolvablePlaceholders(false);
return configurer;
}
}
堆栈跟踪：
java.lang.IllegalArgumentException: Interceptor is required
org.springframework.util.Assert.notNull(Assert.java:112)
org.springframework.web.servlet.config.annotation.InterceptorRegistration.<init>(InterceptorRegistration.java:49)
org.springframework.web.servlet.config.annotation.InterceptorRegistry.addInterceptor(InterceptorRegistry.java:45)
com.example.package.configuration.ApplicationConfiguration.addInterceptors(ApplicationConfiguration.java:52)
org.springframework.web.servlet.config.annotation.WebMvcConfigurerComposite.addInterceptors(WebMvcConfigurerComposite.java:105)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.addInterceptors(DelegatingWebMvcConfiguration.java:55)
org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.getInterceptors(WebMvcConfigurationSupport.java:226)
org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.requestMappingHandlerMapping(WebMvcConfigurationSupport.java:198)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$8a18d4f1.CGLIB$requestMappingHandlerMapping$15(<generated>)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$8a18d4f1$$FastClassBySpringCGLIB$$c1cb4193.invoke(<generated>)
org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:312)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$8a18d4f1.requestMappingHandlerMapping(<generated>)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:483)
org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:586)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:658)
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:530)
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:484)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
javax.servlet.GenericServlet.init(GenericServlet.java:158)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:74)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1015)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:652)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1575)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1533)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:744)
根据朱卡的要求：
java.lang.RuntimeException: This shit is off-the-chain
com.biblioboard.journal.configuration.ApplicationConfiguration.addInterceptors(ApplicationConfiguration.java:62)
org.springframework.web.servlet.config.annotation.WebMvcConfigurerComposite.addInterceptors(WebMvcConfigurerComposite.java:105)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.addInterceptors(DelegatingWebMvcConfiguration.java:55)
org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.getInterceptors(WebMvcConfigurationSupport.java:226)
org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.requestMappingHandlerMapping(WebMvcConfigurationSupport.java:198)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$53b9af71.CGLIB$requestMappingHandlerMapping$27(<generated>)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$53b9af71$$FastClassBySpringCGLIB$$5c73fc1c.invoke(<generated>)
org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:312)
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$53b9af71.requestMappingHandlerMapping(<generated>)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:483)
org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:586)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:658)
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:530)
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:484)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
javax.servlet.GenericServlet.init(GenericServlet.java:158)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:74)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1015)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:652)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1575)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1533)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:744)
【问题讨论】：
-
HandlerStageInterceptor是否在扫描包com.example.package上（在里面） -
是的，拦截器和配置文件在同一个包里。在这种情况下，扫描的包是项目的基础，因此所有内容都会被扫描。如前所述，如果我删除与 Jasypt 相关的 bean，这 确实 工作。
-
只是出于好奇，去掉三个@Bean注解的方法，然后故意从addInterceptors(..)方法中抛出一个运行时异常。然后，您是否在生成的堆栈跟踪中看到任何 CGLIB 增强类？
-
@Jukka 是的，堆栈跟踪中有 4 个 CGLIB 类实例。我已将其附加到问题中。
-
好的。不太确定问题是什么，但我相当确定您可以通过在配置类中将 HandlerStageInterceptor 设置为另一个 @Bean 并且不对其使用扫描/自动装配来解决这种情况。
标签： java spring spring-mvc jasypt