java.lang.ClassNotFoundException: com.fasterxml.jackson.core.JsonProcessingException

严重: Servlet [SpringMVC] in web application [/storm] threw load() exceptionjava.lang.ClassNotFoundException: com.fasterxml.jackson.core.JsonProcessingException    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)    at java.lang.Class.getDeclaredMethods0(Native Method)    at java.lang.Class.privateGetDeclaredMethods(Class.java:2531)    at java.lang.Class.getDeclaredMethods(Class.java:1855)    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:571)    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:490)    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:474)    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:241)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1057)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1030)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:299)    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:122)    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:382)    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:157)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1469)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:663)    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:629)    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:677)    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:548)    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:489)    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)    at javax.servlet.GenericServlet.init(GenericServlet.java:158)    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4909)    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196)    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1069)    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1719)    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)    at java.util.concurrent.FutureTask.run(FutureTask.java:262)    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)    at java.lang.Thread.run(Thread.j

1.使用spring4时需要使用jackson2.X的，在maven中的依赖为

        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-core</artifactId>            <version>2.5.1</version>            <type>bundle</type>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-annotations</artifactId>            <version>2.5.0</version>            <type>bundle</type>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-databind</artifactId>            <version>2.4.0</version>            <type>bundle</type>        </dependency>

2.spring mvc的配置如下

  <mvc:annotation-driven>    <mvc:message-converters>        <bean class="org.springframework.http.converter.ResourceHttpMessageConverter" >        </bean>        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" >         <property name="supportedMediaTypes">            <list>              <value>text/html;charset=UTF-8</value>              <value>application/json;charset=UTF-8</value>            </list>          </property>        </bean>    </mvc:message-converters></mvc:annotation-driven>

3.如果上面的jar包都有了还是报相同的错误，那就去你的本地库去把你所有相关的jar包删除重新使用maven下载，我之前用过1.X版本的jackson，全部删除后再构建就可以运行了