java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

java开发过程中，由于升级jar包，导致回顾老项目时发现私服中的jar更新后，本地maven后各种报错，其中代表性的时下图错误及下面的错误日志；

解决方法:代码版本冲突，根据报错的信息，确定哪些jar冲突(要求java基本功扎实)，确定好后，对pom,xml文件jar进行去重，在你确定冲突的位置，写下如下jar去除脚本，重新maven过，重新启动，一切就ok了。切记时代码冲突的一种解决方式，不是唯一方式。

 

 

 

 

 

 

 

 

 

 

 

1:08:29.571 WARN  org.springframework.context.support.AbstractApplicationContext 557 refresh - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException 21:08:29.582 DEBUG com.mongodb.diagnostics.logging.SLF4JLogger 56 debug - Closing connection connectionId{localValue:1, serverValue:15} 21:08:29.594 ERROR org.springframework.web.context.ContextLoader 316 initWebApplicationContext - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1232) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1131) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:409) ~[spring-web-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291) [spring-web-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103) [spring-web-5.0.4.RELEASE.jar:5.0.4.RELEASE]     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4745) [catalina.jar:8.5.24]