调试MVC自定义消息转换器时出现如下错误，一直找不到原因，有知道的不
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2023-03-09 15:26:00.163 ERROR 1152 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'routerFunctionMapping' defined in class path resource [g/uo/enjoy/conf/WebMvcConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.function.support.RouterFunctionMapping]: Factory method 'routerFunctionMapping' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/cbor/CBORFactory
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.6.jar:5.3.6]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.6.jar:5.3.6]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:782) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:774) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1340) ~[spring-boot-2.4.5.jar:2.4.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329) ~[spring-boot-2.4.5.jar:2.4.5]
at g.uo.enjoy.EnjoyApplication.main(EnjoyApplication.java:17) ~[classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.function.support.RouterFunctionMapping]: Factory method 'routerFunctionMapping' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/cbor/CBORFactory
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.6.jar:5.3.6]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.6.jar:5.3.6]
... 20 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/cbor/CBORFactory
at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder$CborFactoryInitializer.create(Jackson2ObjectMapperBuilder.java:948) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.cbor(Jackson2ObjectMapperBuilder.java:909) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter.(MappingJackson2CborHttpMessageConverter.java:52) ~[spring-web-5.3.6.jar:5.3.6]
at g.uo.enjoy.conf.WebMvcConfig.extendMessageConverters(WebMvcConfig.java:39) ~[classes/:na]
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.getMessageConverters(WebMvcConfigurationSupport.java:867) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.routerFunctionMapping(WebMvcConfigurationSupport.java:566) ~[spring-webmvc-5.3.6.jar:5.3.6]
at g.uo.enjoy.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$718aa754.CGLIB$routerFunctionMapping$36(<generated>) ~[classes/:na]
at g.uo.enjoy.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$718aa754$$FastClassBySpringCGLIB$$11c4f02f.invoke() ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.3.6.jar:5.3.6]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-5.3.6.jar:5.3.6]
at g.uo.enjoy.conf.WebMvcConfig$$EnhancerBySpringCGLIB$$718aa754.routerFunctionMapping(<generated>) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.6.jar:5.3.6]
... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.dataformat.cbor.CBORFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
... 37 common frames omitted
您的 Spring 应用程序似乎存在问题。错误消息表明应用程序未能创建在您的“WebMvcConfig”类中定义的 bean“routerFunctionMapping”。根本原因似乎是缺少类“com.fasterxml.jackson.dataformat.cbor.CBORFactory”，在类路径中找不到。
要解决此问题，您可以尝试将必要的 jackson-databind 库添加到类路径中。您还可以按照错误消息中的建议尝试在启用调试模式的情况下重新运行应用程序，以获得有关该问题的更详细报告。
提示是类没有定义,看下是不是名字写错还是忘记写了
java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/cbor/CBORFactory
少依赖jar包