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Spring 4和Rest WS集成

本文介绍了Spring 4和Rest WS集成的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我一直在为Spring4和RestWS集成做一个poc。我是新手，只有几周的曝光。我正在按照博客的说明进行操作。据我所知，在Spring 4和restWS设置中，jackson-core / anotation / databind 2用于正确的JSON< - > Java对象的消息转换。另外 org.springframework.http.converter.json.MappingJackson2HttpMessageConverter 将用于邮件转换。
我满足了所有这些要求。但是，当我尝试启动应用程序时，我得到bean创建异常。
stack 

 
 SEVERE：将上下文初始化事件发送到类org.springframework.web.context.ContextLoaderListener $ b的侦听器实例的异常$ b org.springframework.beans.factory.BeanCreationException：创建名为'regionController'的bean时出错：注入自动连接的依赖项失败;嵌套异常是org.springframework.beans.factory.BeanCreationException：无法自动装配字段：private org.springframework.web.servlet.View com.leggmason.lmpamfs.controllers.RegionController.jsonView_i;嵌套异常是org.springframework.beans.factory.BeanCreationException：在ServletContext资源[/WEB-INF/applicationContext.xml]中定义的名称为'org.springframework.web.servlet.view.json.MappingJacksonJsonView＃0'的bean创建错误： bean的实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化bean类[org.springframework.web.servlet.view.json.MappingJacksonJsonView]：构造函数抛出异常;嵌套异常是java.lang.NoClassDefFoundError：org / codehaus / jackson / map / ObjectMapper 
 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:292）
 at org。 springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1185）
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）
 at org。 springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）
 at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:304）
 at org .springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）
 at org.springframework.beans.factory.suppor t.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:300）
 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:195）
 at org.springframework.beans.factory。 support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:703）
 at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:760）
 at org.springframework.context.support.AbstractApplicationContext。刷新（AbstractApplicationContext.java:482）
 at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:403）
 at org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader。 java：306）
 at org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:106）
 at org.apache.catalina.core.StandardContext.listenerStart（Stan dardContext.java:4961）
 at org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5455）
 at org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java： 150）
 at org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1559）
 at org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java： 1549）
 at java.util.concurrent.FutureTask.run（Unknown Source）
 at java.util.concurrent.ThreadPoolExecutor.runWorker（Unknown Source）
 at java.util.concurrent.ThreadPoolExecutor $ Worker.run（未知来源）
 at java.lang.Thread.run（未知来源）
引起：org.springframework.beans.factory.BeanCreationException：无法自动装配字段：private org.springframework .web.servlet.View com.leggmason.lmpamfs.controllers.RegionController.jsonView_i;嵌套异常是org.springframework.beans.factory.BeanCreationException：在ServletContext资源[/WEB-INF/applicationContext.xml]中定义的名称为'org.springframework.web.servlet.view.json.MappingJacksonJsonView＃0'的bean创建错误： bean的实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化bean类[org.springframework.web.servlet.view.json.MappingJacksonJsonView]：构造函数抛出异常;嵌套异常是java.lang.NoClassDefFoundError：org / codehaus / jackson / map / ObjectMapper 
 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:508) 
 at org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:87）
 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:289) 
。 ..更多
引起：org.springframework.beans.factory.BeanCreationException：创建名为'org.springframework.web.servlet.view.json.MappingJacksonJsonView＃0'的bean在ServletContext资源中定义错误[/ WEB -INF / applicationContext.xml]：bean的实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException：无法实例化bean类[org.springframework.web.servlet.view.json.MappingJacksonJsonView]：构造函数抛出异常;嵌套异常是java.lang.NoClassDefFoundError：org / codehaus / jackson / map / ObjectMapper 
 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean（AbstractAutowireCapableBeanFactory.java:1076）
 at org。 springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1021）
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:504）
 at org。 springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）
 at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:304）
 at org .springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）
 at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean（AbstractBeanFactory.java:300）
 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:195）
 at org.springframework.beans.factory.support。 DefaultListableBeanFactory.findAutowireCandidates（DefaultListableBeanFactory.java:1017）
 at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:960）
 at org.springframework.beans.factory.support。 DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:858）
 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:480）
 ... 24 more 
引起：org.springframework.beans.BeanInstantiationException：无法实例化bean类[org.springframework.web.servlet.view.json.MappingJacksonJsonView]：构造函数抛出异常;嵌套异常是java.lang.NoClassDefFoundError：org / codehaus / jackson / map / ObjectMapper 
 org.springframework.beans.BeanUtils.instantiateClass（BeanUtils.java:164）
 at org.springframework.beans。 factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:89）
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean（AbstractAutowireCapableBeanFactory.java:1069)
 ... 35 more 
引起：java.lang.NoClassDefFoundError：org / codehaus / jackson / map / ObjectMapper 
 org.springframework.web.servlet.view.json.MappingJacksonJsonView。（MappingJacksonJsonView.java:65）
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method）
 at sun.reflect.NativeConstructorAccessorImpl.newInstance（Unknown Source）
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（Unknown Source）
 at java .lang.reflect.Constructor.newInstance（未知来源）
在org.springframework.beans.BeanUtils.instantiateClass（BeanUtils.java:148）
 ... 37更多
引起：java.lang.ClassNotFoundException：org.codehaus.jackson.map.ObjectMapper 
 at org.apache.catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1702）
 at org.apache.catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1547) 
 .. .43更多

似乎 MappingJacksonJsonView 类出了问题。
可以从工厂文件中删除是造成问题的原因吗？

 < bean class =org.springframework.web .servlet.view.json.MappingJacksonJsonView> 
< property name =contentTypevalue =text / plain/> 
< / bean>

我是否应该更换此课程？
我会帮助解决此问题。



谢谢，
Suvojit

解决方案

您目前正在使用 MappingJacksonJsonView ，它旨在与。



你提到以下内容：

这意味着您在类路径上有。 Jackson1和Jackson2不兼容（不同的包，不同的类等）。



您有2种可能的解决方案


  1. 不要使用并将您的依赖关系切换为

  2. 用 MappingJackson2JsonView

    3. MappingJacksonJsonView >

    I have been doing a poc on Spring4 and RestWS integration. I am new to both with barely a weeks exposure. I am following instructions from blogs. I understand that in Spring 4 and restWS setup jackson-core/anotation/databind 2 is to be used for correct message converstion of JSON <-> Java object to happen. Also org.springframework.http.converter.json.MappingJackson2HttpMessageConverter is to be used for message conversion.I satisfied all these requirements. However when I try to start application, I get bean create exception.stack

    SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'regionController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.web.servlet.View com.leggmason.lmpamfs.controllers.RegionController.jsonView_i; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.json.MappingJacksonJsonView#0' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.servlet.view.json.MappingJacksonJsonView]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4961)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5455)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.web.servlet.View com.leggmason.lmpamfs.controllers.RegionController.jsonView_i; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.json.MappingJacksonJsonView#0' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.servlet.view.json.MappingJacksonJsonView]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 22 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.view.json.MappingJacksonJsonView#0' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.servlet.view.json.MappingJacksonJsonView]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1076)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1021)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
    ... 24 more
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.servlet.view.json.MappingJacksonJsonView]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:164)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1069)
    ... 35 more
Caused by: java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
    at org.springframework.web.servlet.view.json.MappingJacksonJsonView.(MappingJacksonJsonView.java:65)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148)
    ... 37 more
Caused by: java.lang.ClassNotFoundException: org.codehaus.jackson.map.ObjectMapper
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
    ... 43 more

    It seems that something is wrong with MappingJacksonJsonView class.Could following from factory file be the cause of trouble ?

     <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView">
       <property name="contentType" value="text/plain"/>
  </bean>

    Am I supposed to replace this class as well?I will help assistance to fix this.

    Thanks,Suvojit

    解决方案

    You are currently using the MappingJacksonJsonView which is designed to work with Jackson1 .

    You mention the following:

    Which means you have Jackson2 on your classpath. Jackson1 and Jackson2 aren't compatible (different packages, different classes etc.).

    You have 2 possible solutions

    1. Don't use Jackson2 and switch your dependencies to Jackson1
    2. Replace the MappingJacksonJsonView with the MappingJackson2JsonView

    这篇关于Spring 4和Rest WS集成的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

07-26 05:56
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