我是 spring boot 的新手,我非常有兴趣学习这项技术。这是问题所在,我得到了一个带有@configuration 标签的配置文件。所以当我尝试添加 @enablemvc 注释或者如果我在 spring boot 应用程序中添加带有 @enablemvc annoation 的新文件时,我无法运行该应用程序。如果有人能帮我解决这个问题,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
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/");
}
};
}
}
AppConfig.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;
}
}
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);
}
}
ClientMain.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);
}
}
JspClientMain.java
@ComponentScan("com.boot")
@SpringBootApplication
public class JspClientMain {
public static void main(String[] args) {
SpringApplication.run(JspClientMain.class, args);
}
}
最佳答案
通常,@EnableWebMvc
不应在 Spring boot 应用程序中使用。我引用 article by Boz Hogan :
It turns out that Spring Boot doesn’t mix well with the standard Spring MVC
@EnableWebMvc
. What happens when you add the annotation is that Spring Boot's autoconfiguration is disabled.The bad part (that wasted me a few hours) is that in no guide you can find that explicitly stated. (...)
这是来自 Spring Boot documentation 的引述:
If you want to keep Spring Boot MVC features and you want to add additional MVC configuration (interceptors, formatters, view controllers, and other features), you can add your own
@Configuration
class of typeWebMvcConfigurer
but without@EnableWebMvc
. (...)If you want to take complete control of Spring MVC, you can add your own
@Configuration
annotated with@EnableWebMvc
.
因此,要在 Spring Boot 应用程序中使用 @EnableWebMvc
,您需要完全控制 Spring MVC——我读到的是您需要Spring wiz。
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,该共享库包含一个用 @EnableWebMvc
注释的类。删除注释解决了问题。
关于java - 无法使用@EnableWebMvc 配置运行 SPRING BOOT 应用程序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48721984/