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1、确保导入了jackson-core-asl-1.9.13.jar和jackson-mapper-asl-1.9.13.jar包2、在spring的配置文件中加入&mvc:annotation-driven /&这句，它提供了读取jason的支持3、使用springMVC的@ResponseBody注解@responsebody表示该方法的返回结果直接写入HTTP response body中一般在异步获取数据时使用，在使用@RequestMapping后，返回值通常解析为跳转路径，加上@responsebody后返回结果不会被解析为跳转路径，而是直接写入HTTP response body中。比如异步获取json数据，加上@responsebody后，会直接返回json数据。4、在以上配置都正确的情况下，我的项目还是不能返回json串。报错：The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ()。今天终于在一个外文网站找到答案，是由于spring版本的问题引起的。我之前一直用的是3.0.0的版本。就是因为这个版本的问题。于是果断去官网下载3.2版本的，一切正常运行，成功返回json数据。
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&re: Spring MVC使用HttpClient返回json报406错误解决办法& 10:23&13:17 提问
SpringMVC报错，求大神给我看看。我已经自己下载包了，导入还是没用
严重: StandardWrapper.Throwable
java.lang.NoClassDefFoundError: javax/portlet/PortletException
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:3114)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:1342)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1823)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1703)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2625)
at java.lang.Class.getDeclaredMethods(Class.java:1868)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:609)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:521)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:507)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:241)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1069)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1042)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:838)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5253)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5543)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1978)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: javax.portlet.PortletException
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1854)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1703)
... 48 more
十二月 23, :05 上午 org.apache.catalina.core.StandardContext loadOnStartup
严重: Servlet [SpringMVC05] in web application [/SpringMVC04] threw load() exception
java.lang.ClassNotFoundException: javax.portlet.PortletException
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1854)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1703)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:3114)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:1342)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1823)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1703)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2625)
at java.lang.Class.getDeclaredMethods(Class.java:1868)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:609)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:521)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:507)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:241)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1069)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1042)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:838)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5253)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5543)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1978)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
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javax这个包你导了吗？，，
javax不是自带的吗？那我要下载哪个?javax.jar?
你的包没导对，加载异常
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其他相似问题
相关参考资料springmvc 请求无法到达controller，出现404错误的原因
springmvc 请求无法到达controller，出现404错误的原因
最近做springmvc+mybatis+maven项目集成的时候遇到一个问题，项目搭起来以后，http请求怎么都进不到controller中，耗费
了一天多时间弄这个问题，最后发现还是自己对spring的配置文件和各种注解不熟。其实这个问题就是由于注解没配好的缘故
首先，从配置文件讲起
&!-- 加载Spring配置文件 --&
&context-param&
¶m-name&contextConfigLocation&/param-name&
¶m-value&
classpath:spring-context*.xml
&/param-value&
&/context-param&
&listener&
&listener-class&org.springframework.web.context.ContextLoaderListener&/listener-class&
&/listener&
&!-- 加载spring mvc --&
&servlet-name&spring3mvc&/servlet-name&
&servlet-class&org.springframework.web.servlet.DispatcherServlet&/servlet-class&
&init-param&
¶m-name&contextConfigLocation&/param-name&
¶m-value&
classpath:spring-mvc*.xml
&/param-value&
&/init-param&
&load-on-startup&1&/load-on-startup&
&/servlet&
&servlet-mapping&
&servlet-name&spring3mvc&/servlet-name&
&url-pattern&/&/url-pattern&
&/servlet-mapping&
在上面的web.xml中，我们看到基于ContextLoaderListener和DispatcherServlet都可以配置spring相关的XML，两类XML的前缀分别以spring和springmvc开头，说明，基于ContextLoaderListener加载的XML配置，原则上是与spring容器相关的(也可以说是父容器)；而基于DispatcherServlet加载的XML配置，原则上是与springmvc容器相关的(相当于子容器)。
父容器加载的配置文件默认地址为：/WEB-INF/applicationContext.xml，它默认以applicationContext命名，说明它是spring的全局的配置，如果你项目中此文件名和地址都没有改，那么在web.xml中可以不用配置，spring容器会自动到默认地址下去加载。
& & 子容器的配置文件命名默认为[servlet-name]-servlet.xml方式，也就是说servlet-name中如果没有指定init-param属性，系统自动寻找的配置文件为[servlet-name]-servlet.xml，默认路径也是WEB-INF下。
所以个人建议，基于mvc相关的spring配置由DispatcherServlet加载，而其余的JavaBean都交给ContextLoaderListener加载。
值得说明的是这两种方式加载spring的ApplicationContext上下文对象不是合并存储的。mvc
context可以引用applicationContext的bean，而applicationContext无法引用到mvc的bean，spring查找bean，会先在当前context中查找，如果没有满足的，再到父容器查找。而且两个context中可以存在相同的bean定义的，只不过优先查找当前context。并且各context上下文中的声明式标签相互不起作用。也就是说，如果你在applicationContext.xml中声明的&mvc:annotation-driven
/& ，在mvc的context中是不起作用的。
& 说了这么多，其实我项目中的错误原因也就找到了，我的问题在于，我将&mvc:annotation-driven
/&声明在了application上下文的配置中，从而导致mvc的context 中声明的&context:component-scan base-package=&com.hq51.business.controller& /& 不起作用，项目也就无法识别和加载controller了，所以会出现需要controller处理的http请求，最后都是莫名其妙的404错误。
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