java.lang.ClassNotFoundException：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter

我在我的项目中使用spring-integration。 当我在jetty容器中部署我的应用程序时，我收到以下exception：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'integrationRequestMappingHandlerMapping': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inboundhttpJobRequestGateway': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) at com.dsths.spring.web.DsthsContextLoaderListener.configureAndRefreshWebApplicationContext(DsthsContextLoaderListener.java:97) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111) at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:771) at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:411) at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:763) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:247) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1238) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:706) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:480) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at com.dsths.common.container.core.deploy.DeploymentManager.deploy(DeploymentManager.java:54) at com.dsths.common.container.core.deploy.DeploymentManager$$FastClassByCGLIB$$f5bc43eb.invoke() at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:95) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inboundhttpJobRequestGateway': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1035) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:939) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1093) at org.springframework.integration.http.inbound.IntegrationRequestMappingHandlerMapping.detectHandlerMethods(IntegrationRequestMappingHandlerMapping.java:103) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:109) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initApplicationContext(AbstractHandlerMethodMapping.java:89) at org.springframework.context.support.ApplicationObjectSupport.initApplicationContext(ApplicationObjectSupport.java:119) at org.springframework.web.context.support.WebApplicationObjectSupport.initApplicationContext(WebApplicationObjectSupport.java:72) at org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:73) at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:117) at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:92) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1448) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) ... 29 more Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:110) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280) ... 49 more Caused by: java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter at org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.(HttpRequestHandlingEndpointSupport.java:166) at org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.(HttpRequestHandlingMessagingGateway.java:72) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147) ... 51 more Caused by: java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJackson2HttpMessageConverter at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at com.dsths.common.container.ContainerClassLoader.loadClass(ContainerClassLoader.java:136) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:429) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:382) ... 58 more 

我在类路径中同时拥有jars jackson-core-asl-1.8.3和jackson-core-2.3.1 。 我仍然得到错误。 如何解决问题？

Answer 1

有趣的是com.dsths.common.container.ContainerClassLoader …

看起来像spring-integration-http由这个ClassLoader ，但是MappingJackson2HttpMessageConverter和所有其他spring-web类ClassLoader了另一个ClassLoader 。

如果将所有弹簧jar放在同一个类装载器中，那就太棒了。

该应用程序无法在类路径中找到MappingJackson2HttpMessageConverter。 问题是一个类加载器正在选择一个版本而另一个类加载器正在选择另一个版本。

Answer 2

我也有这个奇怪的错误。 我在我的jar子里搜索了Web服务器（tomcat）webapps / myapp / WEB-INF / lib，并且课程就在那里 – 只有一次。

当我在工作中看到另一个项目并使用相同的jacksonjar时，它就消失了。

最初，我有以下几点：

 jackson-core-2.4.3.jar jackson-databind-2.4.3.jar 

我删除了这些并添加了以下内容（打包到我的WEB-INF / lib中）：

 jackson-mapper-asl-1.9.13.jar jackson-datatype-jsr310-2.5.0.jar jackson-datatype-joda-2.5.0.jar jackson-databind-2.5.0.jar jackson-core-2.5.0.jar jackson-annotations-2.5.0.jar 

我在Windows上的Tomcat 7上运行它; 使用Java 1.6（用于Tomcat中的编译和运行时）

servlet.xml中：

如果它有帮助，我从cygwin运行以下shell来搜索jats

 JAR="C:/java/Java/jdk1.7.0_71/bin/jar.exe" srchdir="c:/appservers/apache-tomcat-7.0.57/webapps/my-web/WEB-INF/lib" echo "SEARCH FOLDER: $srchdir" find $srchdir -print | grep '\.jar$' | while read f do $JAR tf $f | grep 'MappingJackson2HttpMessageConverter\.class' >/dev/null 2>&1 [ $? -eq 0 ] && echo "==> $f" && $JAR tf $f | grep MappingJackson2HttpMessageConverter\.class done 

Answer 3

通常，类MappingJackson2HttpMessageConverter存在于spring-web.jar （或spring-web-xyz-RELEASE.jar ）中，您应该将它添加到类路径中，或者如果使用maven添加以下依赖项：

  org.springframework spring-web xyzRELEASE  

根据Artem Bilan编辑评论：

通常，如果你使用maven，它应该作为spring-integration-http的依赖项存在，只要你有这个。