Impossible de résoudre la vue avec le nom 'forward: /index.html' dans servlet avec le nom 'DispatcherServlet'

Question

J'essaie de mettre en œuvre et application qui utiliserait Spring Boot et React.

Ma structure project ressemble à ce

hero-journey-web\ 
    src\main\java\...\ 
         WebMvcConfig.java 
         HeroJourneyWebApplication.java 
      \resources\public\index.html 
         application.properties 

Ma classe HeroJourneyWebApplication ressemble à ce

@EnableWebMvc 
@SpringBootApplication 
public class HeroJourneyWebApplication { 

    public static void main(String[] args) { 
     SpringApplication.run(HeroJourneyWebApplication.class, args); 
    } 
} 

Ma classe WebMvcConfig ressemble à ce

@Configuration 
public class WebMvcConfig implements WebMvcConfigurer { 
    @Override 
    public void addResourceHandlers(ResourceHandlerRegistry registry) { 
     registry.addResourceHandler("/ui/**").addResourceLocations("classpath:/META-INF/resources/ui/"); 
     registry.addResourceHandler("/**").addResourceLocations("classpath:/public/"); 
    } 

    @Override 
    public void addViewControllers(ViewControllerRegistry registry) { 
     registry.addViewController("/").setViewName("forward:/index.html"); 
    } 
} 

Mais quand je tente d'accéder localhost:8080/ (J'ai fourni login et pa ssword pour la sécurité de printemps) Je reçois cette erreur

javax.servlet.ServletException: Could not resolve view with name 'forward:/index.html' in servlet with name 'dispatcherServlet' 
     at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1305) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) ~[spring-webmvc-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:119) ~[spring-boot-actuator-2.0.0.M5.jar!/:2.0.0.M5] 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter.doFilter(DefaultLoginPageGeneratingFilter.java:188) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) ~[spring-security-web-5.0.0.M5.jar!/:5.0.0.M5] 
     at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.0.RELEASE.jar!/:5.0.0.RELEASE] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:na] 
     at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:na] 
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar!/:8.5.23] 
     at java.base/java.lang.Thread.run(Unknown Source) [na:na] 

Quel est le problème?

Answer 1

Vous avez deux chemins d'accès en conflit enregistrés dans "WebMVCConfig.java".

Ceci indique à votre application que chaque requête doit être transmise au dossier "public" classpath.

registry.addResourceHandler("/**").addResourceLocations("classpath:/public/"); 

Mais à côté on dit que vous avez contrôlé des vues (modèles, etc.) en utilisant le chemin « index.html ». Le contrôleur de vue suppose que vous utilisez un moteur de gabarit, puisque c'est la seule raison d'utiliser un contrôleur de vue. Si tout votre contenu html est statique, gardez-le dans les dossiers de ressources publiques et n'ajoutez pas de contrôleur de vue.

Si vous avez également cette application servant une api reposante, alors assurez-vous que tous les appels api vont à un chemin séparé, comme "/ api/v1" ou similaire. Et enfin, placez l'enregistrement du gestionnaire de ressources "/ ui/**" en dernier pour que le chemin "/ **" ne l'écrase pas ou supprime simplement "/ **".

Exemple:

package com.lapots.breed.hero.journey.web; 

import org.springframework.context.annotation.Configuration; 
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; 
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; 

@Configuration 
public class WebMvcConfig implements WebMvcConfigurer{ 

    @Override 
    public void addResourceHandlers(ResourceHandlerRegistry registry){ 

     registry.addResourceHandler("/ui/**").addResourceLocations("classpath:/META-INF/resources/ui/"); 
    } 
} 

Structure:

/hero-journey-web 
    /src/main 
      /java 
        <!-- lemony snippet --> 
      /resources 
       /public/index.html 
       /application.properties 

Commander cet exemple de contenu statique et une API reposant à partir de la même application.

https://github.com/Pytry/bootiful-war-deployment/tree/master/hello-static