java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest

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java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest	at java.lang.Class.getDeclaredMethods0(Native Method)[na:1.8.0_73]	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)[na:1.8.0_73]	at java.lang.Class.getDeclaredMethods(Class.java:1975)[na:1.8.0_73]	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:612)[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)[spring-core-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:241)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1069)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1042)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]	at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]	at io.swagger.Swagger2SpringBoot.main(Swagger2SpringBoot.java:24)[classes/:na]	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_73]	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_73]	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_73]	at java.lang.reflect.Method.invoke(Method.java:497)[na:1.8.0_73]	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)[idea_rt.jar:na]Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)[na:1.8.0_73]	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[na:1.8.0_73]	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)[na:1.8.0_73]	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[na:1.8.0_73]	... 27 more