spring 版本升级到4.3.20.RELEASE与jackson的冲突
版本
记录spring 版本升级到4.3.20.RELEASE之后的一个小问题，升级后jackson和spring依赖如下：
-
jackson 依赖
com.fasterxml.jackson.core jackson-databind 2.1.3 -
springmvc 依赖
org.springframework spring-webmvc 4.3.20.RELEASE
启动异常
Exception in thread "main" 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/core/util/DefaultIndenter
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1160)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1104)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:93)
at com.baofoo.cgwfi.pro.start.StartByMain.main(StartByMain.java:18)
Caused by: 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/core/util/DefaultIndenter
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:154)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1152)
... 13 more
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/util/DefaultIndenter
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.init(AbstractJackson2HttpMessageConverter.java:98)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.(AbstractJackson2HttpMessageConverter.java:91)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.(MappingJackson2HttpMessageConverter.java:66)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.(MappingJackson2HttpMessageConverter.java:57)
at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.(AllEncompassingFormHttpMessageConverter.java:66)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.(RequestMappingHandlerAdapter.java:204)
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:142)
... 15 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.util.DefaultIndenter
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 26 more
异常原因
低版本的的jackson-core，比如说2.1.3，缺少com.fasterxml.jackson.core.util.DefaultIndenter类；
解决办法
com.fasterxml.jackson.core
jackson-databind
2.8.3
备注
应用中使用
Responsible for:
- Registering a DefaultAnnotationHandlerMapping bean for mapping HTTP Servlet Requests to @Controller methods using @RequestMapping annotations.
- Registering a AnnotationMethodHandlerAdapter bean for invoking annotated @Controller methods. Will configure the HandlerAdapter’s webBindingInitializer property for centrally configuring @Controller DataBinder instances:
Configures the conversionService if specified, otherwise defaults to a fresh ConversionService instance created by the default FormattingConversionServiceFactoryBean.
Configures the validator if specified, otherwise defaults to a fresh Validator instance created by the default LocalValidatorFactoryBean if the JSR-303 API is present on the classpath.
Configures standard HttpMessageConverters, including the Jaxb2RootElementHttpMessageConverter if JAXB2 is present on the classpath, and the MappingJacksonHttpMessageConverter if Jackson is present on the classpath.
在AnnotationMethodHandlerAdapter Bean中会配置多个messageConverters，如果classpath中有com.fasterxml.jackson.databind.ObjectMapper、com.fasterxml.jackson.dataformat.xml.XmlMapper类，会调用相关类，创建 messageConverters
private static final boolean jackson2Present = ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", AnnotationDrivenBeanDefinitionParser.class.getClassLoader()) && ClassUtils.isPresent("com.fasterxml.jackson.core.JsonGenerator", AnnotationDrivenBeanDefinitionParser.class.getClassLoader());
getMessageConverters中
if (jackson2XmlPresent) {
type = MappingJackson2XmlHttpMessageConverter.class;
jacksonConverterDef = this.createConverterDefinition(type, source);
jacksonFactoryDef = this.createObjectMapperFactoryDefinition(source);
jacksonFactoryDef.getPropertyValues().add("createXmlMapper", true);
jacksonConverterDef.getConstructorArgumentValues().addIndexedArgumentValue(0, jacksonFactoryDef);
messageConverters.add(jacksonConverterDef);
} else if (jaxb2Present) {
messageConverters.add(this.createConverterDefinition(Jaxb2RootElementHttpMessageConverter.class, source));
}
if (jackson2Present) {
type = MappingJackson2HttpMessageConverter.class;
jacksonConverterDef = this.createConverterDefinition(type, source);
jacksonFactoryDef = this.createObjectMapperFactoryDefinition(source);
jacksonConverterDef.getConstructorArgumentValues().addIndexedArgumentValue(0, jacksonFactoryDef);
messageConverters.add(jacksonConverterDef);
} else if (gsonPresent) {
messageConverters.add(this.createConverterDefinition(GsonHttpMessageConverter.class, source));
}
参考
https://blog.csdn.net/fw0124/article/details/48280083