Spring Boot viewControllerHandlerMapping 配置

这是我的 Application.java 的示例要点

@Configuration
@EnableAutoConfiguration
@ComponentScan(basePackages = "org.com.app.client.controller")
@EnableJpaRepositories(basePackages = "org.com.app")
@EntityScan(basePackages = "org.com.app.model")
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) {
        ApplicationContext ctx = SpringApplication.run(Application.class, args);
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }


    /**
     * Spring Web MVC Confugrations
     *
     **/
    @Bean
    public ExceptionHandlerExceptionResolver exceptionHandlerExceptionResolver(){
        ExceptionHandlerExceptionResolver exceptionHandlerExceptionResolver = new ExceptionHandlerExceptionResolver();
        return  exceptionHandlerExceptionResolver;
    }
    @Bean
    public ViewResolver internalResourceViewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/jsp/");
        viewResolver.setSuffix(".jsp");
        return  viewResolver;
    }

但是，当我尝试运行 mvn spring-boot:run 时，总是会发生此异常。我缺少什么？

12:30:22.670 [org.brightworks.genesis.client.Application.main()] WARN  o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'viewControllerHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'viewControllerHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: The resources may
     not be accessed if they are not currently started
            at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]

            at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.SpringApplication.run(SpringApplication.java:320) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.SpringApplication.run(SpringApplication.java:957) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.SpringApplication.run(SpringApplication.java:946) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.brightworks.genesis.client.Application.main(Application.java:38) [classes/:na]
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_67]
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_67]
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_67]
            at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_67]
            at org.springframework.boot.maven.RunMojo$LaunchRunner.run(RunMojo.java:418) [spring-boot-maven-plugin-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
    Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'viewControllerHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: The resources may not be accessed if they are not currently started
            at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            ... 23 common frames omitted
    Caused by: java.lang.IllegalStateException: The resources may not be accessed if they are not currently started
            at org.apache.catalina.webresources.StandardRoot.validate(StandardRoot.java:232) ~[tomcat-embed-core-8.0.3.jar:8.0.3]
            at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:199) ~[tomcat-embed-core-8.0.3.jar:8.0.3]
            at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:193) ~[tomcat-embed-core-8.0.3.jar:8.0.3]
            at org.apache.catalina.core.ApplicationContext.getResource(ApplicationContext.java:533) ~[tomcat-embed-core-8.0.3.jar:8.0.3]
            at org.apache.catalina.core.ApplicationContextFacade.getResource(ApplicationContextFacade.java:198) ~[tomcat-embed-core-8.0.3.jar:8.0.3]
            at org.springframework.web.context.support.ServletContextResource.exists(ServletContextResource.java:102) ~[spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.addStaticIndexHtmlViewControllers(WebMvcAutoConfiguration.java:275) ~[spring-boot-autoconfigure-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.addViewControllers(WebMvcAutoConfiguration.java:270) ~[spring-boot-autoconfigure-1.2.3.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.web.servlet.config.annotation.WebMvcConfigurerComposite.addViewControllers(WebMvcConfigurerComposite.java:119) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.addViewControllers(DelegatingWebMvcConfiguration.java:77) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.viewControllerHandlerMapping(WebMvcConfigurationSupport.java:346) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$76267062.CGLIB$viewControllerHandlerMapping$20(<generated>) ~[spring-core-4.1.6.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$76267062$$FastClassBySpringCGLIB$$259225cd.invoke(<generated>) ~[spring-core-4.1.6.RELEASE.jar:1.2.3.RELEASE]
            at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$76267062.viewControllerHandlerMapping(<generated>) ~[spring-core-4.1.6.RELEASE.jar:1.2.3.RELEASE]
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_67]
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_67]
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_67]
            at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_67]
            at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
            ... 24 common frames omitted

我找到了解决方案。我使用的 servlet 版本不正确。我使用的是 Servlet 版本 3.0.1，我已经覆盖了 Spring Boot 的默认 Servlet 版本，因此出现了错误。