那些遇到过的问题

无法使用 @EnableWebMvc 配置运行 SPRING BOOT 应用程序

Bat*_*man 0 java spring-mvc gradle spring-boot

我是 Spring Boot 的新手，我非常有兴趣学习这项技术。问题是，我得到了一个带有 @configuration 标记的配置文件。因此，当我尝试添加 @enablemvc 注释或者在 Spring Boot 应用程序中添加带有 @enablemvc 注释的新文件时，我无法运行该应用程序。如果有人能帮助我解决这个问题，我真的很感激。

日志

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resourceHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'resourceHandlerMapping' threw exception; nested exception is org.springframework.beans.factory.BeanInitializationException: Failed to init ResourceHttpRequestHandler; nested exception is java.lang.IllegalStateException: WebApplicationObjectSupport instance [ResourceHttpRequestHandler [locations=[class path resource [resources/], class path resource [images/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@39e6b948]]] does not run in a WebApplicationContext but in: org.springframework.context.annotation.AnnotationConfigApplicationContext@19b44076: startup date [Sat Feb 10 09:34:19 EST 2018]; root of context hierarchy
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:134) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.builder.SpringApplicationBuilder.configureAsChildIfNecessary(SpringApplicationBuilder.java:147) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:130) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at com.boot.main.ClientMain.main(ClientMain.java:31) [bin/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_131]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.9.RELEASE.jar:1.5.9.RELEASE]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'resourceHandlerMapping' threw exception; nested exception is org.springframework.beans.factory.BeanInitializationException: Failed to init ResourceHttpRequestHandler; nested exception is java.lang.IllegalStateException: WebApplicationObjectSupport instance [ResourceHttpRequestHandler [locations=[class path resource [resources/], class path resource [images/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@39e6b948]]] does not run in a WebApplicationContext but in: org.springframework.context.annotation.AnnotationConfigApplicationContext@19b44076: startup date [Sat Feb 10 09:34:19 EST 2018]; root of context hierarchy
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    ... 23 common frames omitted
Caused by: org.springframework.beans.factory.BeanInitializationException: Failed to init ResourceHttpRequestHandler; nested exception is java.lang.IllegalStateException: WebApplicationObjectSupport instance [ResourceHttpRequestHandler [locations=[class path resource [resources/], class path resource [images/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@39e6b948]]] does not run in a WebApplicationContext but in: org.springframework.context.annotation.AnnotationConfigApplicationContext@19b44076: startup date [Sat Feb 10 09:34:19 EST 2018]; root of context hierarchy
    at org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry.getHandlerMapping(ResourceHandlerRegistry.java:150) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.resourceHandlerMapping(WebMvcConfigurationSupport.java:446) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$7c7bc0fe.CGLIB$resourceHandlerMapping$28(<generated>) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$7c7bc0fe$$FastClassBySpringCGLIB$$d042f6eb.invoke(<generated>) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$7c7bc0fe.resourceHandlerMapping(<generated>) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_131]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    ... 24 common frames omitted
Caused by: java.lang.IllegalStateException: WebApplicationObjectSupport instance [ResourceHttpRequestHandler [locations=[class path resource [resources/], class path resource [images/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@39e6b948]]] does not run in a WebApplicationContext but in: org.springframework.context.annotation.AnnotationConfigApplicationContext@19b44076: startup date [Sat Feb 10 09:34:19 EST 2018]; root of context hierarchy
    at org.springframework.web.context.support.WebApplicationObjectSupport.getWebApplicationContext(WebApplicationObjectSupport.java:112) ~[spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.context.support.WebApplicationObjectSupport.getServletContext(WebApplicationObjectSupport.java:128) ~[spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.resource.ResourceHttpRequestHandler.initContentNegotiationStrategy(ResourceHttpRequestHandler.java:306) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.resource.ResourceHttpRequestHandler.afterPropertiesSet(ResourceHttpRequestHandler.java:268) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry.getHandlerMapping(ResourceHandlerRegistry.java:147) ~[spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    ... 35 common frames omitted
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自动配置.java

@Configuration
//@EnableAutoConfiguration
@ConditionalOnClass(MyClass.class)
@EnableConfigurationProperties(MyProperties.class)
@ComponentScan({ "com.boot", "com.jspClient" })
@SpringBootApplication
public class AutoConfiguration {

    private static Log log = LogFactory.getLog(AutoConfiguration.class);




    @Bean
    public ViewResolver getViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        return resolver;
    }

    /*@Bean  
    public UrlBasedViewResolver urlBasedViewResolver() {  
      UrlBasedViewResolver resolver = new UrlBasedViewResolver();  
      resolver.setPrefix("/WEB-INF/jsp/");  
      resolver.setSuffix(".jsp");
      resolver.setViewClass(JstlView.class);  
      return resolver;  
    }*/


    //http://www.logicbig.com/tutorials/spring-framework/spring-web-mvc/simple-mapping-exception-resolver/
    //https://github.com/paulc4/mvc-exceptions/blob/master/src/main/java/demo/config/ExceptionConfiguration.java
    @Bean
    public SimpleMappingExceptionResolver createSimpleMappingExceptionResolver() {
      SimpleMappingExceptionResolver resolver = new SimpleMappingExceptionResolver();
      Properties errorMaps = new Properties();
      errorMaps.setProperty(UserNotFoundException.class.getName(), "myError");
      errorMaps.setProperty("Exception", "generic_error");
      resolver.setExceptionMappings(errorMaps);
      resolver.setDefaultErrorView("generic_error");
      resolver.setExceptionAttribute("exc");
      return resolver;
   }

    @Bean
    WebMvcConfigurer configurer () {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addResourceHandlers (ResourceHandlerRegistry registry) {
                ResourceHandlerRegistration resourceRegistration  = registry
                        .addResourceHandler("/pages/**")
                        .addResourceLocations("/resources/","classpath:/images/")  //Configuring Multiple Locations for a Resource
                        .setCachePeriod(3600);            //The resources served will be cached in the browser for 3600 seconds
                registry.addResourceHandler("resources/**").addResourceLocations("/resources/");
                //registry.addResourceHandler("/css/**").addResourceLocations("/css/");
                //registry.addResourceHandler("/img/**").addResourceLocations("/img/");
                //registry.addResourceHandler("/js/**").addResourceLocations("/js/");
            }
        };
    }
}
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应用程序配置.java

@Configuration 
@ComponentScan("com.boot.controllers") 
@EnableWebMvc
public class AppConfig extends WebMvcConfigurerAdapter {  

    @Bean
    public SimpleMappingExceptionResolver createSimpleMappingExceptionResolver() {
      SimpleMappingExceptionResolver resolver = new SimpleMappingExceptionResolver();
      Properties errorMaps = new Properties();
      errorMaps.setProperty("ElectricityNotFoundException", "error");
      errorMaps.setProperty("NullPointerException", "error");
      resolver.setExceptionMappings(errorMaps);
      resolver.setDefaultErrorView("globalerror");
      resolver.setExceptionAttribute("exc");
      return resolver;
   }
}
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WebAppInitializer.java

public class WebAppInitializer implements WebApplicationInitializer {
    public void onStartup(ServletContext servletContext) throws ServletException {  
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();  
        ctx.register(AppConfig.class);  
        ctx.setServletContext(servletContext);    
        Dynamic dynamic = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));  
        dynamic.addMapping("/");  
        dynamic.setLoadOnStartup(1);  
   }  
}
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客户端Main.java

@ComponentScan("com.boot") // to scan controller under com.boot -> com.boot.controllers
@SpringBootApplication
public class ClientMain {

    private static SpringApplicationBuilder start(Class<?>... sources) {
        return new SpringApplicationBuilder(ClientMain.class)
            .child(sources);
    }

    public static void main(String[] args) throws Exception {

        // using just Spring alone
        /*ApplicationContext context = new AnnotationConfigApplicationContext(AutoConfiguration.class);

    }

}
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JspClientMain.java

@ComponentScan("com.boot") 
@SpringBootApplication
public class JspClientMain {

    public static void main(String[] args) {
        SpringApplication.run(JspClientMain.class, args);
    }
}
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Pau*_*son 5

一般来说，@EnableWebMvc不应该在 Spring boot 应用程序中使用。我引用博兹霍根的一篇文章：

\n
\n

事实证明，Spring Boot 不能与标准 Spring MVC 很好地混合@EnableWebMvc。添加注释时会发生的情况是 Spring Boot 的自动配置被禁用。

\n

不好的部分（浪费了我几个小时）是，在任何指南中你都找不到明确说明的内容。（...）

\n
\n

这是Spring Boot 文档中的引用：

\n
\n

如果您想保留 Spring Boot MVC 功能并添加额外的 MVC 配置（拦截器、格式化程序、视图控制器和其他功能），您可以添加自己的@Configuration类型类，WebMvcConfigurer但不带 @EnableWebMvc. （...）

\n

如果你想完全控制Spring MVC，你可以添加你自己的@Configuration注释@EnableWebMvc。

\n
\n

因此，要@EnableWebMvc在 Spring Boot 应用程序中使用，您需要完全控制Spring MVC\xe2\x80\x94 我读到了这一点，因为您需要成为 Spring wiz。

\n

我们遇到了一个 Spring boot 1.5.9 应用程序的问题，该应用程序依赖于一个共享库，该库包含一个用@EnableWebMvc. 删除注释解决了问题。

\n

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