SpringMVC @ResponseBody MappingJackson2HttpMessageConverter 配置出错。

vip3652204732 2018-06-06 09:58:59
Spring-mvc.xml 配置


<!--避免IE执行AJAX时，返回JSON出现下载文件 -->

	<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">

		<property name="supportedMediaTypes">

			<list>

				<value>text/html;charset=UTF-8</value>

			</list>

		</property>

	</bean>

	<!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->

	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">

		<property name="messageConverters">

			<list>

				<ref bean="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />	<!-- JSON转换器 -->

			</list>

		</property>

	</bean>


错误信息


[org.springframework.web.context.support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#0': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [WebappClassLoader

  context: tlProject

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@3930015a

]

[org.springframework.web.servlet.DispatcherServlet] - Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#0': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [WebappClassLoader

  context: tlProject

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@3930015a

]

	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:262)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1202)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)

	

	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:638)

	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:686)

	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:554)

	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)

	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)

	at javax.servlet.GenericServlet.init(GenericServlet.java:158)

	

Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [WebappClassLoader

  context: tlProject

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@3930015a

]

	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659)

	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556)

	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541)

	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:245)

	... 30 more

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

	at java.lang.Class.getDeclaredMethods0(Native Method)

	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)

	at java.lang.Class.getDeclaredMethods(Class.java:1975)

	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641)

	... 33 more

Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1352)

	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1180)

	... 37 more

六月 06, 2018 9:46:03 上午 org.apache.catalina.core.ApplicationContext log

严重: StandardWrapper.Throwable

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#0': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [WebappClassLoader

  context: tlProject

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@3930015a

]

	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:262)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1202)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541)

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)

	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)

	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)

	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)

	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)

	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)

	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)

	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)

	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:672)

	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:638)

	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:686)

	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:554)

	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)

	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)

	at javax.servlet.GenericServlet.init(GenericServlet.java:158)

	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1188)

	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1132)

	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1021)

	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5069)

	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)

	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)

	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1410)

	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1400)

	at java.util.concurrent.FutureTask.run(FutureTask.java:266)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

	at java.lang.Thread.run(Thread.java:748)

Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [WebappClassLoader

  context: tlProject

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@3930015a

]

	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659)

	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556)

	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541)

	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:245)

	... 30 more

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

	at java.lang.Class.getDeclaredMethods0(Native Method)

	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)

	at java.lang.Class.getDeclaredMethods(Class.java:1975)

	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641)

	... 33 more

Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1352)

	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1180)

	... 37 more


我的Spring版本是 5.0.6 求大神看一下！
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竹子_bamboo 2018-06-06
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希望这个对你有帮助 https://www.cnblogs.com/shihaiming/p/6702572.html
Mosthandsomeykh 2018-06-06
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是不是jackson的jre包没对
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