Java Spring引导在几分钟后停止解析视图

我有一个SpringBoot应用程序，它突然停止解析视图，而是向我抛出404个错误

这些是我的依赖项：

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
    </dependency>

    <!-- Jasper -->

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>

    <!-- Hibernate validator -->

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
    </dependency>

    <!-- BoneCP -->

    <dependency>
        <groupId>com.jolbox</groupId>
        <artifactId>bonecp</artifactId>
        <version>${bonecp.version}</version>
    </dependency>

    <!-- MySql Java Connector -->

    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc14</artifactId>
        <version>10.2.0.4.0</version>
        <scope>system</scope>
        <systemPath>${basedir}/src/main/resources/lib/ojdbc14-10.2.0.4.0.jar</systemPath>
    </dependency>

    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>${guava.version}</version>
    </dependency>

    <dependency>
        <groupId>javax.inject</groupId>
        <artifactId>javax.inject</artifactId>
        <version>1</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-hibernate4</artifactId>
        <version>2.5.3</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

主控制器（尽管每个返回视图的控制器都失败）：

控制器被称为fine，它通过查看日志来完成其工作（例如从数据库中获取记录以填充ModelMap（变量

appVersion

和

projects

，在返回它之前，我已将其编辑为“（…）”）

---

我试图加载的页面在应用程序刚刚启动时工作正常，因此控制器本身也可以工作（它一直工作正常，但我一定是引入了一个改变，导致了这一切的发生）。在嵌入式Tomcat中停止并重新启动应用程序解决了这个问题，在将WAR部署到独立的Linux Tomcat服务器上时，该应用程序似乎运行良好（运行半小时，没有404s）。

我认为关于最初的问题没有足够的信息，但当我面临完全相同的问题时，这是我的解决方案：

@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（新字符串[]{“*.html”，“*.xhtml”}）修复了该问题

一旦我将日志记录级别设置为trace，我就能够看到问题：
Resource“类路径：/templates/home.html.html未找到”
模板中添加了两个后缀。至于为什么它在失败前几分钟起作用，对我来说仍然是个谜

希望这对某人有所帮助。
我只是想知道，为什么要使用“ProjectOutputService”的final关键字？嗯，问得好。不知道为什么，我可能是复制并粘贴了一些东西，但我忘了删除它。我会处理掉的，谢谢！你检查过tomcat home中的工作文件夹了吗？@lenicliu我正在通过Maven运行它，所以我不知道工作文件夹在哪里。它在项目文件夹的/target下吗？@fernandopg你有没有让它工作过？我对spring boot+嵌入式下拖/tomcat+thymeleaf也有同样的问题。奇怪的是，只有html解析器在几分钟后停止工作，json视图解析器出于某种原因继续工作。
@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<ProjectOutput> projectOutputs = projectOutputService.getProjects();

        map.addAttribute("projects", projectOutputs);
        map.addAttribute("appVersion", appVersion);
        return new ModelAndView("home",map);
    }

@RequestMapping(method=RequestMethod.GET, value={"/overview/{projectId}"}, produces = "application/json")
@ResponseBody
public ResponseEntity<ProjectOverview> 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);
    }
}

}

2016-03-18 12:49:26 TRACE o.s.w.s.v.InternalResourceViewResolver:164 - Cached view [home]
2016-03-18 12:49:26 DEBUG o.s.w.s.v.ContentNegotiatingViewResolver: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 o.s.w.s.DispatcherServlet: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 o.s.w.s.v.JstlView:261 - Rendering view with name 'home' with model {projects=[ (...) ], appVersion=1.1} and static attributes {}
2016-03-18 12:49:26 DEBUG o.s.w.s.v.JstlView:377 - Added model object 'projects' of type [java.util.ArrayList] to request in view with name 'home'
2016-03-18 12:49:26 DEBUG o.s.w.s.v.JstlView:377 - Added model object 'appVersion' of type [java.lang.String] to request in view with name 'home'
2016-03-18 12:49:26 DEBUG o.s.w.s.v.JstlView:207 - Forwarding to resource [/WEB-INF/jsp/home.jsp] in InternalResourceView 'home'
2016-03-18 12:49:26 TRACE o.s.t.s.TransactionSynchronizationManager: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 o.s.o.j.s.OpenEntityManagerInViewInterceptor:112 - Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
2016-03-18 12:49:26 DEBUG o.s.o.j.EntityManagerFactoryUtils:435 - Closing JPA EntityManager
2016-03-18 12:49:26 TRACE o.h.i.SessionImpl:353 - Closing session
2016-03-18 12:49:26 TRACE o.h.e.j.i.JdbcCoordinatorImpl:190 - Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@d45342]
2016-03-18 12:49:26 TRACE o.h.e.j.i.LogicalConnectionImpl:178 - Closing logical connection
2016-03-18 12:49:26 DEBUG o.h.e.j.i.LogicalConnectionImpl:246 - Releasing JDBC connection
2016-03-18 12:49:26 DEBUG o.h.e.j.i.LogicalConnectionImpl:264 - Released JDBC connection
2016-03-18 12:49:26 TRACE o.h.e.j.i.LogicalConnectionImpl:190 - Logical connection closed
2016-03-18 12:49:26 TRACE o.s.w.s.DispatcherServlet:1053 - Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1b8ac37
2016-03-18 12:49:26 DEBUG o.s.w.s.DispatcherServlet:991 - Successfully completed request
2016-03-18 12:49:26 TRACE o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext: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]

@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;
}