使用json时报错：nested exception is java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config

最近在使用maven引入json包时一直报以下错误

HTTP Status 500 - Handler processing failed; nested exception is java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config      type Exception report    message Handler processing failed; nested exception is java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config    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: javax/servlet/jsp/jstl/core/Config      org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1305)      org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:979)      org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)      org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)      org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)      javax.servlet.http.HttpServlet.service(HttpServlet.java:622)      org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)      javax.servlet.http.HttpServlet.service(HttpServlet.java:729)      org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)      root cause  java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config      org.springframework.web.servlet.support.JstlUtils.exposeLocalizationContext(JstlUtils.java:101)      org.springframework.web.servlet.view.JstlView.exposeHelpers(JstlView.java:135)      org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142)      org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)      org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1246)      org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1029)      org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:973)      org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)      org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)      org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)      javax.servlet.http.HttpServlet.service(HttpServlet.java:622)      org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)      javax.servlet.http.HttpServlet.service(HttpServlet.java:729)      org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)      root cause  java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config      org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)      org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)      org.springframework.web.servlet.support.JstlUtils.exposeLocalizationContext(JstlUtils.java:101)      org.springframework.web.servlet.view.JstlView.exposeHelpers(JstlView.java:135)      org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142)      org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)      org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1246)      org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1029)      org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:973)      org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)      org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)      org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)      javax.servlet.http.HttpServlet.service(HttpServlet.java:622)      org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)      javax.servlet.http.HttpServlet.service(HttpServlet.java:729)      org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)      note The full stack trace of the root cause is available in the Apache Tomcat/8.0.33 logs.  

这个问题我在网上找了很多资料，都说是因为没有导包之类的，但明明已经是通过maven已经导了包的，经过反复的测试，最终发现一个解决办法。不通过maven导包，自行使用lib导包。

解决办法：

1.删除pom.xml文件中json导包声明。

2.下载3个json的jar包，json的3个jar包下载

3.把3个jar包复制到项目中的lib文件夹中

4.右键3个jar包选择 Build Path --> Add to Build Path

5.重启服务器

小结：有时在使用maven导入jar包的时候就会报这个错，自己手动导入一下就没问题了。