处理程序处理失败；嵌套异常是 java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext答案

【问题标题】：Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext处理程序处理失败；嵌套异常是 java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
【发布时间】：2014-02-11 09:55:44
【问题描述】：

我在访问 spring-social 和 facebook 时遇到了 NoClassDefFound 异常。奇怪的是我有一个项目使用相同的代码进行连接，而另一个项目则使用 nt.我已经了解了他们两个之间的差异，但没有发现任何对我有意义的地方。

这是我得到的完整跟踪。欢迎任何提示或搜索方向。

    type Exception report
    message Handler processing failed; nested exception is java.lang.NoClassDefFoundError:     org/apache/http/client/protocol/HttpClientContext

    description The server encountered an internal error that prevented it from fulfilling this request.exception

org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
    org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1259)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
    org.springframework.social.support.ClientHttpRequestFactorySelector$HttpComponentsClientRequestFactoryCreator$1.createHttpContext(ClientHttpRequestFactorySelector.java:80)
    org.springframework.http.client.HttpComponentsClientHttpRequestFactory.createRequest(HttpComponentsClientHttpRequestFactory.java:134)
    org.springframework.http.client.support.HttpAccessor.createRequest(HttpAccessor.java:76)
    org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
    org.springframework.web.client.RestTemplate.execute(RestTemplate.java:452)
    org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:302)
    org.springframework.social.oauth2.OAuth2Template.postForAccessGrant(OAuth2Template.java:232)
    org.springframework.social.oauth2.OAuth2Template.exchangeForAccess(OAuth2Template.java:142)
    org.springframework.social.connect.web.ConnectSupport.completeConnection(ConnectSupport.java:151)
    org.springframework.social.connect.web.ConnectController.oauth2Callback(ConnectController.java:250)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.37 logs.

【问题讨论】：

标签： spring-social spring-social-facebook spring-social-linkedin

【解决方案1】：

org/apache/http/client/protocol/HttpClientContext 是自 4.3 (https://hc.apache.org/httpcomponents-client-4.3.x/httpclient/apidocs/org/apache/http/client/protocol/HttpClientContext.html) 以来封装在 httpcomponents-client 中的一个类。我认为您根本没有正确的版本或项目。

尝试添加这个：

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.3.2</version>
</dependency>

【讨论】：

如果您使用 pom 层次结构，请不要忘记添加子项的依赖项（但没有版本）。