Spring Boot会在几分钟后停止解析视图
我有一个Spring Boot应用程序，突然停止解析视图，而是向我抛出404错误。
这些是我的依赖：
org.springframework.boot spring-boot-starter org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-data-jpa org.springframework spring-context org.apache.tomcat.embed tomcat-embed-jasper provided org.hibernate hibernate-validator com.jolbox bonecp ${bonecp.version} com.oracle ojdbc14 10.2.0.4.0 system ${basedir}/src/main/resources/lib/ojdbc14-10.2.0.4.0.jar com.google.guava guava ${guava.version} javax.inject javax.inject 1 javax.servlet jstl com.fasterxml.jackson.datatype jackson-datatype-hibernate4 2.5.3 org.springframework.boot spring-boot-starter-web 该应用程序启动正常，让我浏览没有任何问题。 但是，如果我停止查看并继续执行操作，当我刷新Web浏览器时，我会看到Tomcat 404页面：
HTTP Status 404 - /WEB-INF/jsp/home.jsp type: Status report message: /WEB-INF/jsp/home.jsp description: The requested resource is not available. Apache Tomcat/7.0.52
家庭控制器（虽然每个返回视图的控制器都会失败）：
@Controller public class ProjectOutputController { private static final Logger LOGGER = LoggerFactory.getLogger(ProjectOutputController.class); private final ProjectOutputService projectOutputService; @Value("${app.version}") private String appVersion; @Inject public ProjectOutputController(final ProjectOutputService projectOutputService) { this.projectOutputService = projectOutputService; } @RequestMapping(value={"/", "/home", "/results"}) public ModelAndView getHomeView(){ LOGGER.trace("Returning main view"); ModelMap map = new ModelMap(); List projectOutputs = projectOutputService.getProjects(); map.addAttribute("projects", projectOutputs); map.addAttribute("appVersion", appVersion); return new ModelAndView("home",map); }
但是，这个可以工作，因为它不会返回视图，而是返回原始JSON作为字符串
@RequestMapping(method=RequestMethod.GET, value={"/overview/{projectId}"}, produces = "application/json") @ResponseBody public ResponseEntity showProjectJson(@PathVariable String projectId) { LOGGER.trace("Returning JSON for project ID " + projectId + " view"); try { return new ResponseEntity (projectOverviewService.getProjectbyId(projectId), HttpStatus.OK); } catch (ProjectOverviewNotFoundException e) { LOGGER.error("Project not found - " + e); return new ResponseEntity (HttpStatus.NOT_FOUND); } } }
Spring Boot的跟踪日志：
2016-03-18 12:49:26 TRACE oswsvInternalResourceViewResolver:164 - Cached view [home] 2016-03-18 12:49:26 DEBUG oswsvContentNegotiatingViewResolver:402 - Returning [org.springframework.web.servlet.view.JstlView: name 'home'; URL [/WEB-INF/jsp/home.jsp]] based on requested media type 'text/html' 2016-03-18 12:49:26 DEBUG oswsDispatcherServlet:1214 - Rendering view [org.springframework.web.servlet.view.JstlView: name 'home'; URL [/WEB-INF/jsp/home.jsp]] in DispatcherServlet with name 'dispatcherServlet' 2016-03-18 12:49:26 TRACE oswsvJstlView:261 - Rendering view with name 'home' with model {projects=[ (...) ], appVersion=1.1} and static attributes {} 2016-03-18 12:49:26 DEBUG oswsvJstlView:377 - Added model object 'projects' of type [java.util.ArrayList] to request in view with name 'home' 2016-03-18 12:49:26 DEBUG oswsvJstlView:377 - Added model object 'appVersion' of type [java.lang.String] to request in view with name 'home' 2016-03-18 12:49:26 DEBUG oswsvJstlView:207 - Forwarding to resource [/WEB-INF/jsp/home.jsp] in InternalResourceView 'home' 2016-03-18 12:49:26 TRACE ostsTransactionSynchronizationManager:243 - Removed value [org.springframework.orm.jpa.EntityManagerHolder@1b217c9] for key [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@17b412f] from thread [http-nio-8080-exec-1] 2016-03-18 12:49:26 DEBUG osojsOpenEntityManagerInViewInterceptor:112 - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor 2016-03-18 12:49:26 DEBUG osojEntityManagerFactoryUtils:435 - Closing JPA EntityManager 2016-03-18 12:49:26 TRACE ohiSessionImpl:353 - Closing session 2016-03-18 12:49:26 TRACE ohejiJdbcCoordinatorImpl:190 - Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@d45342] 2016-03-18 12:49:26 TRACE ohejiLogicalConnectionImpl:178 - Closing logical connection 2016-03-18 12:49:26 DEBUG ohejiLogicalConnectionImpl:246 - Releasing JDBC connection 2016-03-18 12:49:26 DEBUG ohejiLogicalConnectionImpl:264 - Released JDBC connection 2016-03-18 12:49:26 TRACE ohejiLogicalConnectionImpl:190 - Logical connection closed 2016-03-18 12:49:26 TRACE oswsDispatcherServlet:1053 - Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1b8ac37 2016-03-18 12:49:26 DEBUG oswsDispatcherServlet:991 - Successfully completed request 2016-03-18 12:49:26 TRACE osbceAnnotationConfigEmbeddedWebApplicationContext:331 - Publishing event in org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@121bfd2: ServletRequestHandledEvent: url=[/]; client=[0:0:0:0:0:0:0:1]; method=[GET]; servlet=[dispatcherServlet]; session=[null]; user=[null]; time=[390ms]; status=[OK]
控制器被称为正常，它完成它的工作（例如从数据库获取记录以填充ModelMap（变量appVersion和projects ，我已经编辑到“（…）”），然后返回它）通过查找在日志。
我正在尝试加载的页面在应用程序刚启动时工作正常，因此控制器本身可以工作（它一直运行良好，但我必须引入一个导致所有这一切发生的变化）。 在嵌入式Tomcat中停止并重新启动应用程序可以解决问题，并且在将WAR部署到独立的Linux Tomcat服务器时，应用程序似乎运行良好（半小时内没有404）。
我不认为原始问题上有足够的信息，但是当我面对同样的问题时，这对我来说是解决方案：
@Bean public ITemplateResolver templateResolver() { SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver(); templateResolver.setPrefix("classpath:/templates/"); templateResolver.setSuffix(".html"); templateResolver.setTemplateMode("HTML5"); templateResolver.setCacheable(true); return templateResolver; } @Bean public SpringTemplateEngine templateEngine() { SpringTemplateEngine templateEngine = new SpringTemplateEngine(); templateEngine.addDialect(new LayoutDialect()); templateEngine.addDialect(new SpringSecurityDialect()); templateEngine.setTemplateResolver(templateResolver()); return templateEngine; } @Bean public ViewResolver viewResolver() { ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); viewResolver.setTemplateEngine(templateEngine()); viewResolver.setOrder(0); // viewResolver.setViewNames(new String[] { "*.html", "*.xhtml" }); return viewResolver; }
删除viewResolver.setViewNames(new String[] { "*.html", "*.xhtml" }); 解决了这个问题。
一旦我将日志记录级别设置为跟踪，我就能看到问题： Resource "classpath:/templates/home.html.html was not found"模板中添加了两个后缀。 至于为什么它在失败之前工作了几分钟对我来说仍然是一个谜。
希望这有助于某人。