Spring Boot + Spring Security + Tomcat = 在应用程序上下文中找不到可见的 WebSecurityExpressionHandler 实例答案

【问题标题】：Spring Boot + Spring Security + Tomcat = No visible WebSecurityExpressionHandler instance could be found in the application contextSpring Boot + Spring Security + Tomcat = 在应用程序上下文中找不到可见的 WebSecurityExpressionHandler 实例
【发布时间】：2015-06-24 17:44:03
【问题描述】：

我在将 war 应用程序部署到 Tomcat 时经常收到此错误：

在应用程序上下文。

在 tomcat 管理器应用程序中停止并重新加载应用程序有帮助（一次、两次，有时更多，但在某些时候重新加载总是有帮助的）。

然而，当我将应用程序作为 jar 运行时，这从未发生过。

我应该怎么做才能有一个可靠的tomcat部署过程？现在就像：上传，开始，检查，不工作所以停止，开始，检查不工作所以停止，开始，好的工作。

编辑：

Spring Boot 1.2.3 发布
Thymeleaf 2.1.4-发布
雄猫 7
Java 8

42095 [http-bio-80-exec-1] INFO  o.a.c.c.C.[.[.pl].[/##1.0.3] - Initializing Spring FrameworkServlet 'dispatcherServlet' 
42095 [http-bio-80-exec-1] INFO  o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization started 
42183 [http-bio-80-exec-1] INFO  o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization completed in 88 ms 
43463 [http-bio-80-exec-1] ERROR org.thymeleaf.TemplateEngine - [THYMELEAF][http-bio-80-exec-1] Exception processing template "index": No visible WebSecurityExpressionHandler instance could be found in the application context. There must be at least one in order to support expressions in Spring Security authorization queries. (fragments/page_elements) 
43483 [http-bio-80-exec-1] ERROR o.s.b.context.web.ErrorPageFilter - Forwarding to error page from request [/] due to exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: No visible WebSecurityExpressionHandler instance could be found in the application context. There must be at least one in order to support expressions in Spring Security authorization queries. (fragments/page_elements)] 
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: No visible WebSecurityExpressionHandler instance could be found in the application context. There must be at least one in order to support expressions in Spring Security authorization queries. (fragments/page_elements)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) ~[tomcat-servlet-api-3.0.jar:na]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) ~[tomcat-servlet-api-3.0.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) ~[spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:139) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:85) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) ~[spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85) ~[spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:113) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
    at org.springframework.boot.context.web.ErrorPageFilter.access$000(ErrorPageFilter.java:59) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
    at org.springframework.boot.context.web.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:88) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:106) [spring-boot-1.2.3.RELEASE.jar:1.2.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) [tomcat-coyote-7.0.52.jar:7.0.52]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_40]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_40]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_40]
Caused by: org.thymeleaf.exceptions.TemplateProcessingException: No visible WebSecurityExpressionHandler instance could be found in the application context. There must be at least one in order to support expressions in Spring Security authorization queries. (fragments/page_elements)
    at org.thymeleaf.extras.springsecurity3.auth.AuthUtils.getExpressionHandler(AuthUtils.java:267) ~[thymeleaf-extras-springsecurity3-2.1.1.RELEASE.jar:na]
    at org.thymeleaf.extras.springsecurity3.auth.AuthUtils.authorizeUsingAccessExpression(AuthUtils.java:182) ~[thymeleaf-extras-springsecurity3-2.1.1.RELEASE.jar:na]
    at org.thymeleaf.extras.springsecurity3.dialect.processor.AuthorizeAttrProcessor.isVisible(AuthorizeAttrProcessor.java:100) ~[thymeleaf-extras-springsecurity3-2.1.1.RELEASE.jar:na]
    at org.thymeleaf.processor.attr.AbstractConditionalVisibilityAttrProcessor.processAttribute(AbstractConditionalVisibilityAttrProcessor.java:59) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.applyNextProcessor(Node.java:1017) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:972) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Node.processNode(Node.java:990) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.dom.Document.process(Document.java:93) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1155) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335) ~[thymeleaf-spring4-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:190) ~[thymeleaf-spring4-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    ... 69 common frames omitted

【问题讨论】：

你能提供一个完整的堆栈跟踪吗？您使用的是什么版本的 Spring Boot、Spring Security 和 Thymeleaf？
我正在使用 Spring Boot 1.2.3 Release 和 Spring Security（和 Thymeleaf）版本由 spring boot starter pom 管理（我没有在我的 pom.xml 中覆盖 spring security 版本）跨度>

标签： spring tomcat spring-security spring-boot thymeleaf

【解决方案1】：

我确实有同样的错误

Spring Boot 1.3.x、1.4.x -> 创建战争文件
Thymeleaf 2.1.5（+ thymeleaf-extras-springsecurity4-2.1.2.RELEASE）
Tomcat 8（测试到 8.0.36）
Java 8

原因： Spring Boot 正在创建两个应用程序上下文，一个带有 Tomcat 侦听器等的 WebApplicationContext，另一个带有所有 bean 的 WebApplicationContext。此外，第二个上下文被设置为第一个上下文的父级。不幸的是，Thymeleaf AuthUtils 将获得第一个上下文，在那里他们尝试解析 WebSecurityExpressionHandler bean，但 bean 解析没有检查父上下文。（不知道这是Thymeleaf的AuthUtils中bean解析的bug还是Spring中的Bug……）

尽管如此，我现在还没有正确的解决方案 - 只是一种解决方法。

解决方法： 我可以通过删除文件夹内容来解决这个问题：

/tomcat/work//*
/tomcat/temp/*

但我发现这种解决方法不适用于

Tomcat 8.0.41
Tomcat 8.5.11

编辑： 我可以解决问题，但对我来说这是某种错误配置。

首先你应该阅读这个：http://docs.spring.io/spring-boot/docs/current/reference/html/howto-traditional-deployment.html

还有人提到：

如果您现有的应用程序有多个 ApplicationContext（例如，如果它使用 AbstractDispatcherServletInitializer），那么您可以将所有上下文源压缩到一个 SpringApplication 中

但在我的例子中，我有一个扩展 SpringBootServletInitializer 的第二个类，其中包含用于 servlet 注册的 bean。覆盖“配置”方法加剧了问题。从这个类中删除这个扩展解决了这个问题。

【讨论】：

我接受了你的回答，因为你给出了原因，但我通过在控制器中计算用户的安全属性并将它们作为标志传递给 thymeleaf 解决了我的问题。

【解决方案2】：

从 org.springframework.security.web.access.expression.DefaultWebSecurityExpressionHandler 类中添加一个 bean 将解决您的问题

但是当你使用Spring-boot

请检查您是否已将以下库添加到您的 gradle 或 maven。 (以下格式为gradle)

org.springframework.boot:spring-boot-starter-thymeleaf
org.springframework.boot:spring-boot-starter-web
org.springframework.boot:spring-boot-starter-security
org.thymeleaf.extras:thymeleaf-extras-springsecurity3:2.1.1.RELEASE

【讨论】：